FSG 59 Electrical and Electronic Equipment Components

Electrical and Electronic Equipment Components

Note-Mounting hardware, included in classes of this group, includes such specially designed items as brackets, holders, retainers, etc. Excluded from classes in this group are such hardware items as screws (Class 5305), bolts (Class 5306), studs (Class 5307), washers (Class 5310), rivets (Class 5320), and other common items indexed to specific classes, other than in Group 59. The FSC indexes and structure will govern the classification of items used on or with mounting hardware cited above.

Supply Items Included in Federal Supply Group 59
RESISTOR,ADJUSTABLE

A resistor whose overall ohmic value is fixed; in addition, it has one or more movable terminals which are designed to be set and fixed prior to use, to include any desired value of resistance within the range of the complete resistor. The opposition to the flow of current is an inherent property of the material used and is manifest in the heat dissipated in the item itself.

RESISTOR,FIXED,WIRE WOUND

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of high resistance wire (or ribbon) either wound on an insulated form or constructed so as to be self supporting. Opposition to the flow of current is an inherent property of the resistance wire and is manifest by the heat dissipation in the resistor. Excludes SUPPRESSOR, IGNITION INTERFERENCE.

RESISTOR,FIXED,COMPOSITION

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of a mixture of carbon, an insulating material, and suitable binders, either molded together or applied as a thin layer of conducting material on an insulated form. The opposition to the flow of current is an inherent property of the materials used and is manifest by the heat dissipation in the item itself. See also ATTENUATOR, FIXED; RESISTOR, FIXED, FILM; and RESISTOR, THERMAL. Excludes SUPPRESSOR, IGNITION INTERFERENCE.

DUMMY RESISTOR

RESISTOR,THERMAL

A thermally sensitive resistor whose primary function is to exhibit a change in electrical resistance with a change in body temperature. Item may be mounted in a probe or housing. For ballast tube type resistors, see RESISTOR (1), CURRENT REGULATING. Excludes TRANSMITTER (1), TEMPERATURE, ELECTRICAL RESISTANCE and TEMPERATURE ELEMENT, RESISTANCE METEOROLOGICAL.

RESISTOR ASSEMBLY

Two or more individual fixed, variable, thermal, or adjustable resistors on a common mounting or mounted on each other. The resistors must be separable and each must be capable of functioning in accordance with its applicable item name. For variable resistors mounted in tandem with a common or dual concentric shaft, see RESISTOR, VARIABLE (as modified) and ATTENUATOR, VARIABLE. For inseparable resistors permanently cased, sealed or potted together to form a multisection unit, see RESISTOR ASSORTMENT; RESISTOR SET, MATCHED; and items which have wire leads temporarily twisted together, or are otherwise physically attached solely for convenience in handling or shipping.

RESISTOR SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of a resistor, but which in itself is not a complete functioning item and cannot be assigned a definite item name.

SHIELD,RESISTOR

An item specifically designed to be placed around a resistor for the purpose of shielding against electrical or mechanical interference. May include mounting facilities. See also COVER (as modified); HOUSING (as modified); VISOR (as modified).

RESISTANCE ELEMENT

An item of electrically resistive material in the form of a grid, ribbon, or wire designed to be used singly or built into groups to form a resistance unit. It is usually a maintenance part for a RESISTOR (as modified), a RHEOSTAT, or similar item. Includes items which can be used as "heaters" (heating elements) but which are rated in terms of resistance and resistance tolerance. Excludes ABSORBER, RADIO FREQUENCY RADIATION; HEATER, THERMAL RELEASE; HEATING ELEMENT, ELECTRICAL (as modified); and RESISTOR (as modified).

RESISTOR,FIXED,FILM

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of either a thin layer of conductive material, containing either binders or insulating materials, deposited on an insulated form; or an alloy of metal and ceramic materials, usually fused to an insulated form. Opposition to the flow of current is an inherent property of the materials used and is manifest by the heat dissipation in the resistor. See also ATTENUATOR, FIXED and RESISTOR, FIXED, COMPOSITION. Excludes carbon composition type resistors.

RESISTOR,VOLTAGE SENSITIVE

A resistor specifically designed so that its ohms value decreases with increasing applied voltage over at least a portion of its rated ohmic range. See also ABSORBER, OVERVOLTAGE.

RESISTOR,CURRENT REGULATING

A resistor with its resistive element contained in a gas filled inclosure, specifically designed to maintain a relatively constant current flow in a circuit by compensating for variations in voltage. See also RESISTOR, THERMAL and RESISTOR, VOLTAGE SENSITIVE.

HOLDER,RESISTOR

An item designed primarily to mechanically and/or electrically accommodate one or more resistors in such a way that they may be readily inserted or removed. For items in which the resistors are to be mounted by using screw type terminals or solder lugs, see TERMINAL BOARD. If the holder will accommodate either fuses or resistors, use item name FUSEHOLDER. For items designed to accommodate lamp base type resistors, see LAMPHOLDER and LAMPHOLDER ASSEMBLY.

RESISTOR ASSORTMENT

Two or more of the same or different types of resistors of different known values grouped together in a single package and intended for individual replacement and wide selectivity range.

RESISTOR SET,MATCHED

A grouping of two or more separate fixed resistors which, when connected in series or parallel, will produce a specified total resistance, or whose resistance values are equal to each other within a specified tolerance. For items which are connected as required for use, and/or which are mounted on a common mounting or on each other, see RESISTOR ASSEMBLY. Excludes NETWORK, IMPEDANCE MATCHING.

RESISTOR NETWORK,FIXED,FILM

An arrangement of multiple fixed resistive elements or discrete resistors permanently encased, encapsulated, or potted together, to form an inseparable unit. The resistive elements, consisting of a thin layer of conductive material deposited on or fused to an insulating base, usually are electrically connected to each other and may be arranged in any circuit configuration. Excludes RESISTOR, FIXED (as modified); RESISTOR ASSEMBLY; RESISTOR NETWORK, FIXED-VARIABLE; and RESISTOR SET, MATCHED.

RESISTOR NETWORK,FIXED,WIRE WOUND

An arrangement of multiple fixed resistive elements or discrete resistors permanently encased, encapsulated, or potted together, to form an inseparable unit. The resistive elements, consisting of high resistance wire (or ribbon), usually are electrically connected to each other and may be arranged in any circuit configuration. Excludes RESISTOR, FIXED (as modified); RESISTOR ASSEMBLY; RESISTOR NETWORK, FIXED-VARIABLE; and RESISTOR SET, MATCHED.

RESISTOR NETWORK,FIXED-VARIABLE

An arrangement of multiple fixed and variable resistive elements or discrete resistors permanently encased, encapsulated, or potted together to form an inseparable unit. The resistive elements may consist of a thin layer of conductive material deposited on or fused to an insulating base, or may consist of high resistance wire (or ribbon). The elements usually are electrically connected to each other and may be arranged in any circuit configuration. Excludes RESISTOR, FIXED, (as modified); RESISTOR, VARIABLE, (as modified); RESISTOR ASSEMBLY; and RESISTOR SET, MATCHED. See also RESISTOR NETWORK, FIXED, FILM; RESISTOR NETWORK, FIXED, WIREWOUND.

RESISTOR,VARIABLE,HYBRID

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element. Uniform contact pressure on the resistance element is maintained by positive pressure to permit smooth electrical and mechanical control of the resistor over the entire resistance range. The resistive element is constructed of a combination of two materials usually consisting of a wirewound element with a coating of conductive plastic applied over the resistance wire where the slider makes contact. May be constructed of a single or multiturns of wire supported on an insulating structure on which the wiper contacts the coated wire continuously in the direction of wiper travel. The opposition to the flow of current is an inherent property of the wire used and is manifested in the heat dissipated in the resistor itself. For items having manually positioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE. For items with step by step variation, see RHEOSTAT; and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes other RESISTOR (1), VARIABLE, (as modified).

RESISTOR,FIXED,WIRE WOUND,INDUCTIVE

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of high resistance wire (or ribbon) either wound on an insulated form or constructed so as to be self-supporting. The item must have inherent characteristics of inducing self-inductance. Opposition to current flow is an inherent property of the resistance wire and is manifested by the heat dissipation in the resistor. Exclut s SUPPRESSOR, IGNITION INTERFERENCE. See also RESISTOR (1), FIXED, WIRE WOUND, NONINDUCTIVE.

RESISTOR,FIXED,WIRE WOUND,NONINDUCTIVE

A resistor whose ohmic value cannot be adjusted or varied. The resistance element consists of high resistance wire (or ribbon) either wound on an insulated form or constructed so as to be self-supporting. The items must have inherent characteristics of inducing little or no self-inductance. Opposition to current flowo s an inherent property of the resistance wire and is manifested by the heat dissipation in the resistor. Excludes SUPPRESSOR, IGNITION INTERFERENCE. See also RESISTOR (1), FIXENTEWIRE WOUND, INDUCTIVE.

RESISTOR,VARIABLE,NONWIRE WOUND,NONPRECISION

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity), if given, of the output is greater than plus or minus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE. For items with step by step variation, see RHEOSTAT and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes RESISTOR (1), VARIABLE, WIRE WOUND, NONPRECISION; RESISTOR (1), VARIABLE, NONWIRE WOUND PRECISION; and RESISTOR (1), VARIABLE, WIRE WOUND, PRECISION.

RESISTOR,VARIABLE,WIRE WOUND,NONPRECISION

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity), if given, of the output is greater than plus of minus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE. For items with step by step variation, see RHEOSTAT and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes RESISTOR (1), VARIABLE, NONWIRE WOUND, NONPRECISION; RESISTOR (1), VARIABLE, NONWIRE WOUND, PRECISION; and RESISTOR (1), VARIABLE, WIRE WOUND, PRECISION.

RESISTOR,VARIABLE,NONWIRE WOUND,PRECISION

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The finctional tolerance (linearity) of the output is equal to or less than plus or minus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually postioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE. For items with step by step variation, see REHOSTAT and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes RESISTOR (1), VARIABLE, WIRE WOUND, NONPRECISION; RESISTOR (1), VARIABLE NONWIRE WOUND, NONPRECISION; and RESISTOR (1), VARIABLE, WIRE WOUND, PRECISION.

RESISTOR,VARIABLE,WIRE WOUND,PRECISION

A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity) of the output is equal to or less than plus or munus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE, For items with step by step variation, see RHEOSTAT and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes RESISTOR (1), VARIABLE, NONWIRE WOUND, NONPRECISION; RESISTOR (1), VARIABLE, NONWIRE WOUND, PRECISION; and RESISTOR (1), VARIABLE, WIRE WOUND, NONPRECISION.

PLATE,MOUNTING

A metallic or nonmetallic item which is rigid, flat and generally smooth. Its thickness is small in comparison to its length and width. It is designed for mounting another item and may have drilled or threaded holes or other facilities for mounting to a supporting object or surface. See SUPPORT, as modified. Do not use if a more specific name applies.

RESISTOR NETWORK,VOLTAGE SENSITIVE

An arrangement of multiple voltage sensitive resistors permanently, encased, encapsulated or potted together to form an inseparable unit. The voltage sensitive resistors usually are electrically connected to each other and may be arranged in any circuit configuration. Excludes RESISTOR, FIXED (as modified); RESISTOR VARIABLE (as modified); RESISTOR ASSEMBLY and RESISTOR SET, MATCHED. See also RESISTOR NETWORK, FIXED, FILM; RESISTOR NETWORK, FIXED, WIREWOUND and RESISTOR NETWORK, THERMAL.

RESISTOR NETWORK,THERMAL

An arrangement of multiple thermally sensitive resistors permanently encased, encapsulated, or potted together to form an inseparable unit. The thermally sensitive resistors usually are electrically connected to each other and may be arranged in any circuit configuration. Excludes RESISTOR, FIXED (as modified); RESISTOR, VARIABLE (as modified); RESISTOR ASSEMBLY; and RESISTOR SET, MATCHED. See also RESISTOR NETWORK, FIXED, FILM; RESISTOR NETWORK, FIXED WIREWOUND; and RESISTOR NETOWRK, VOLTAGE SENSITIVE.

RESISTOR,VARIABLE,MOTOR DRIVEN

A resistor, whose resistance value is controlled by an electric motor, which is coupled to the resistor shaft by a friction type clutch.

RESISTOR,CHIP,FIXED,FILM

A resistor whose ohmic value cannot be adjusted or varied. The resistor element consists of either a thin layer or conductive material, containing neither binders or insulating materials, deposited on an insulated form, or an alloy of metal and ceramic materials, usually fused to an insulated form. Opposition to the flow of current is an inherent property of the materials used and is manifest by the heat dissipation in the resistor. Primarily intended for incorporation into microelectronic circuits and surface mounted applications.

CAPACITOR,FIXED,PAPER DIELECTRIC

A capacitor whose capacitance value cannot be adjusted or varied, having paper as the dielectric material. It may be a single unit or consist of two or more fixed units which cannot be seperated. For items whose dielectric material consist of plasticized (plastic impregnated) paper or paper-plastic combinations, see CAPACITOR, FIXED, PLASTIC DIELECTRIC. For items whose electrodes consist of a metallic film deposited (metallized) on the dielectric material, see CAPACITOR, FIXED, METALIZED, PAPER-PLASTIC DIELECTRIC.

CAPACITOR,FIXED,GLASS DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied, having a glass (silicas) or glass like substance (e.g., porcelain, vitreous enamel) as the dielectric material. It may be a single unit, or consist of two or more fixed units which cannot be separated.

CAPACITOR,FIXED,MICA DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied, having natural sheet mica or reconstituted flaked mica formed into sheets as the dielectric material. It may be a single unit, or consist of two or more fixed units which cannot be separated.

CAPACITOR,FIXED,PLASTIC DIELECTRIC

A capacitor whose capacitance value cannot be adjusted or varied, having a plastic, plastic film, plasticized (plastic impregnated) paper, or any combination of plastic and paper or plastic and paper films as the dielectric material. The plastic may be one or more types of synthetic compounds such as polyesters, polyfluorides, polycabonates, and the like. It may be a single unit, or consist of two or more fixed units which cannot be separated. For items whose electrodes consist of a metallic film deposited (metallized) on the dielectric material, see CAPACITOR, FIXED, METALLIZED, PAPER-PLASTIC DIELECTRIC.

CAPACITOR,FIXED,CERAMIC DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied, having a ceramic dielectric.It may be a single unit, or consist of two or more fixed units which cannot be separated.

CAPACITOR,FIXED,ELECTROLYTIC

A capacitor, whose capacitance value cannot be adjusted or varied, having a chemically formed film as the dielectric. It may be a single unit, or consist of two or more fixed units which cannot be separated.

CAPACITOR,FIXED,AIR DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied, having only air as a dielectric. It may be a single unit, or consist of two or more fixed units which cannot be separated. It excludes CAPACITOR,FIXED,GAS DIELECTRIC.

CAPACITOR ASSEMBLY

Two or more separable CAPACITOR, FIXED (as modified) and/or CAPACITOR, VARIABLE (as modified) having a common mounting or mounted on each other. Excludes single fixed capacitors with multiple sections; single variable capacitors with integral trimmers or with multiple sections actuated by a single shaft; CAPACITOR ASSORTMENT; and CAPACITOR SET, MATCHED.

CAPACITOR,VARIABLE,AIR DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,GLASS DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,OIL DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,CERAMIC DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,MICA DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,PLASTIC DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

SHIELD,CAPACITOR

An item specifically designed to be placed around a capacitor for the purpose of shielding against electrical or mechanical interference. May include mounting facilities. See also COVER (as modified); HOUSING (as modified) and VISOR (as modified).

ROTOR,CAPACITOR

The rotatable shaft and the shaft mounted plates of a variable capacitor.

PLATE,CAPACITOR

One of the electrodes of a capacitor.

CAPACITOR,FIXED,GAS DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied. It may be a single unit, or consist of two or more fixed untis which cannot be separated. Its dielectric may be either gas or vacuum.

CAPACITOR,FIXED,QUARTZ DIELECTRIC

A capacitor, whose capacitance value cannot be adjusted or varied, having natural quartz as the dielectric material. It may be single unit, or consist of two or more fixed units which cannot be separated.

RETAINER,CAPACITOR

An item primarily designed to position and/or restrain the movement of one or more capacitors in their normal mounting position. Excludes CLIP, ELECTRICAL and CLAMP, LOOP.

CAPACITOR ASSORTMENT

Two or more of the same or different types of capacitors of different known values grouped together in a single package and intended for individual replacement and wide selectivity range.

CAPACITOR,VARIABLE,QUARTZ DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable.

CAPACITOR,VARIABLE,GAS DIELECTRIC

A capacitor whose capacitance value is controlled by a mechanical means which effects a continuous variation of its capacitance. It includes items consisting of two or more variable capacitors which are inseparable. Its dielectric may be either gas or vacuum.

CAPACITOR SET,MATCHED

A grouping of two or more separate CAPACITOR, FIXED (as modified) which, when connected in series or parallel, provide a specific total capacitance, or whose capacitance values are equal to each other within a specified tolerance. For items having a common mounting or mounted on each other, see CAPACITOR ASSEMBLY. Excludes single capacitors having multiple sections.

CAPACITOR,FIXED,METALLIZED,PAPER-PLASTIC DIELECTRIC

A capacitor whose capacitance value cannot be adjusted or varied having paper, plastic, or any combination of paper and plastic as the dielectric material with a metallic film deposited thereon. It may be a single unit or consist of two or more units which cannot be separated.

CASE,CAPACITOR

A case specifically designed to hold a capacitor.

FILTER,BAND PASS

An item designed to pass frequencies within a specified range (band) and to suppress frequencies outside the range (band). Excludes a single inductance, or a single capacitance, or a single resistance. See COIL (as modified); REACTOR; CAPACITOR (as modified); and RESISTOR (as modified).

FILTER,BAND SUPPRESSION

An item designed to suppress frequencies within a specified range (band) and to pass frequencies outside the range (band). Excludes a single inductance, a single capacitance, or a single resistance. See COIL (as modified); CAPACITOR (as modified); and RESISTOR (as modified).

IMPEDANCE STABILIZING GROUP

Two or more items which do not operate as a set or mechanical system, but which are used as part of a set or mechanical system to couple two circuits in such a manner that the impedance is maintained at a fixed ratio over a wide band of frequencies.

COVER,IMPEDANCE MATCHING NETWORK

FILTER,RADIO FREQUENCY INTERFERENCE

An item designed to suppress undesired (interfering) frequencies and have a minimal effect on the desired frequencies when inserted in an electrical power circuit. Excludes items which consist of a single capacitor, inductor, resistor, or devices consisting of only two or more circuit elements of the same basic name. Excludes FILTER, LOW PASS and SUPPRESSOR, IGNITION INTERFERENCE. For items designed to be inserted in a line which is primarily intended to carry high frequency waves modulated with signals, such as antenna lead-in, see FILTER, BAND SUPPRESSION and FILTER, BAND PASS. See also LIMITER, ELECTRICAL NOISE.

SUPPRESSOR,PARASITIC

An item consisting of an inductance and a resistance normally in parallel. The inductance is usually wound around the resistor. Half of the turns may be wound to inductively oppose the other half. It is designed to be inserted in the circuit of a radio frequency stage to suppress high frequency parasitic oscillations. For items designed to widen the band width, or amplify a portion of the band in an amplifier circuit, see COIL, RADIO FREQUENCY.

CAPACITOR-RESISTOR

An item consisting of one or more capacitors and one or more resistors molded together, housed together in a common case, or mounted on a common board. The individual capacitors and resistors are not separable and the overall item usually has various design applications; hence, cannot be considered a subassembly. Do not use if more applicable item names, such as FILTER (as modified), or NETWORK (as modified), exist.

NETWORK,HYBRID CIRCUIT

A component consisting of two or more different items, such as resistors, telephone repeating coils and capacitors, electrically connected and designed to provide facilities for connecting one or more two-wire communications circuits to one or more four-wire communications circuits. may include band-pass filters and/or protective apparatus. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified). See also NETWORK, IMPEDANCE MATCHING.

FILTER,HIGH PASS

An item designed to pass all frequencies above a specified frequency. Excludes a single inductance, a single capacitance, or a single resistance. See COIL (as modified); REACTOR; CAPACITOR (as modified); and RESISTOR (as modified).

FILTER,LOW PASS

An item designed to pass all frequencies below a specified frequency. Excludes a single inductance, a single capacitance, or a single resistance. See COIL (as modified); REACTOR; CAPACITOR (as modified); and RESISTOR (as modified).

PHASE SHIFTER,ELECTRONIC

An electronic component or a grouping of electronic components that induces a fixed or variable phase shift to an electronic signal from 0 to 360 degrees. The item may be adjusted by means of a slotted shaft, knurled knob or motor driven and may or may not be provided with a locking device.

RETAINER,ELECTRICAL FILTER

An item designed primarily to station and/or restrain the movement of one or more electrical filter(s) in its/their normal mounting position.

FILTER,LOW-PASS-HIGH PASS-BAND PASS

A single item having the triple function of FILTER, LOW PASS; FILTER, HIGH PASS and FILTER, BAND PASS. Each filter may have a separate input connection, but each filter must have separate output connections.

NETWORK,CIRCUIT PROTECTION

A group of items such as resistors, semiconductors and the like which are electrically connected and designed to effect a current and/or voltage limitation in one or several coupled circuits.

FILTER,BAND PASS-BAND SUPPRESSION

A single item having the dual function of a FILTER, BAND PASS and FILTER, BAND SUPPRESSION. Each filter may have separate input connections, but each filter must have separate output connections.

FILTER,BAND PASS-LOW PASS

A single item having the dual function of a FILTER, BAND PASS and a FILTER, LOW PASS. Each filter may have separate input connections, but each filter must have separate output connections. Excludes a single inductance, capacitance, or resistance. See COIL (as modified); REACTOR; CAPACITOR (as modified); and RESISTOR (as modified).

FILTER,DIRECT CURRENT POWER

A device consisting of a combination of two or more items such as inductors, capacitors, or resistors in any combination, so designed that when properly placed in an electrical circuit they will smooth out voltage fluctuations of the direct current output of power supplies, dynamotors, generators, and the like. Do not use for items which consist of a single resistor, capacitor, or inductor used to perform the same function.

FILTER,HIGH PASS-LOW PASS

A single item having the dual function of a FILTER,HIGH PASS and a FILTER,LOW PASS. Each filter may have a separate input connection, but each filter must have separate output connections. Excludes a single inductance, capacitance, or resistor. See FILTER,BAND SUPPRESSION.

FILTER ASSEMBLY,ELECTRICAL

Two or more electrical filters on a common mounting or mounted on each other. Does not include coils, capacitors or resistors alone.

FILTER SUBASSEMBLY

NETWORK,IMPEDANCE MATCHING

A grouping of two or more different discrete items, such as resistors, coils, and capacitors, electrically connected and used as a unit to couple two or more circuits in such a manner that the impedance of each circuit will be equal to the impedance into which it hooks. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified). See also ATTENUATOR (as modified); and TRANSFORMER (as modified). Excludes RESISTOR SET, MATCHED.

NETWORK,LINE BALANCING

A grouping of two or more different items such as resistors, coils and capacitors, electrically connected and used to couple two or more lines when these lines are at different levels such as "ground" and "insulated from ground." For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified). See also ATTENUATOR(as modified); FILTER (as modified); TRANSFORMER (as modified); and EQUALIZER (as modified).

NETWORK,PHASE CHANGING

A grouping of two or more different discrete items, such as resistors, coils, or capacitors, electrically connected and used as a unit to effect a change in phase, such as shifting, splitting, and inversion of voltage or current in a circuit. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified).

NETWORK,PULSE FORMING

A grouping of two or more different discrete items, such as resistors, coils, and capacitors, electrically connected and used to shape the leading and/or trailing edge of a pulse. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified). See also ATTENUATOR (as modified); FILTER (as modified); and TRANSFORMER (as modified).

NETWORK,SUMMATION

A grouping of two or more different discrete items, such as resistors, capacitors, or coils, electrically connected and designed to sum two or more sources of data and combine into a single input for a computer or other electrical or electronic equipment. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified).

NETWORK,TEMPERATURE COMPENSATING

A grouping of two or more different discrete items, such as resistors, coils, and capacitors, electrically connected and designed so that its electrical constants change with temperature in a predetermined manner. For items fabricated by monolithic and/or thin film techniques, see MICROCIRCUIT (as modified). See also ATTENUATOR (as modified); FILTER (as modified); and TRANSFORMER (as modified).

SUPPRESSOR,HARMONIC,ELECTRIC ORGAN

An item consisting of a coil of wire with a core of magnetic material which is tuned to a specific frequency either by means of its own distributed capacitance or with a commonly mounted capacitor, specifically designed to suppress undesired harmonics generated by a tone generator of an electronic organ.

RECTIFIER NETWORK,UNITIZED

Two or more diode semiconductor devices combined with resistors and capacitors to form a circuit network designed to function as a unit in changing alternating current to direct current. The diode devices are internally connected in series and incorporate parallel resistors and capacitors, as compensation networks, shunting each diode. The item is permanently cased, encapsulated, potted, or molded together to form an inseparable unit. These units may be designed as either half-wave or full-wave rectifiers and may be mounted to form either single phase or three phase bridges. For interconnected items arranged in stack(s), see RECTIFIER, SEMICONDUCTOR DEVICE. For items fabricated in the form of a monolithic or thin film structure that perform the function of a circuit, see INTEGRATED CIRCUIT (as modified). Excludes SEMICONDUCTOR DEVICES, UNITIZED; SEMICONDUCTOR DEVICE ASSEMBLY; and RECTIFIER, SEMICONDUCTOR DEVICE, UNITIZED.

FILTER,ALTERNATING CURRENT POWER

A device consisting of a combination of two or more items such as inductors, capacitors, or resistors in any combination, so designed that when properly placed in an electrical circuit they will smooth out voltage fluctuations of the alternating current output of power supplies, dynamotors, generators, etc. Do not use for items which consist of a single resistor, capacitor, or inductor used to perform the same function.

FUSE,CARTRIDGE

A fuse in which the element is inclosed in a cylindrical body. The element may be renewable. The terminals may be of varying types. It may contain a visual indication that the fusible element is severed, and may also provide an audible alarm through auxiliary circuitry. For noncylindrical items, see FUSE, INCLOSED LINK.

FUSE,ENCLOSED LINK

A fuse in which the element is inclosed in a body of other than cylindrical shape. It may include visual indication that the fusible element is severed. For cylindrical items, see FUSE, CARTRIDGE. Excludes FUSE, OPEN LINK; and FUSE LINK, ELECTRICAL.

FUSE,INDICATOR ALARM

A fuse in which the element may or may not be enclosed. It is specifically designed to close an auxiliary circuit. When the fuse element is broken, it may provide a visual signal.

BLOCK,TELEPHONE PROTECTOR

An item designed to be used with other similar items in an electrical circuit to form an open-space cut-out for protection against high potentials, such as lightning and/or abnormal electric currents. It is a maintenance part for a PROTECTOR, TELEPHONE.

PANEL,FUSE

An item which consists of a panel with fuseholders mounted thereon and with terminal facilities. It is usually designed for power distribution service. May include fuses.

DUMMY FUSE

An item designed to occupy the space of a fuse without having the electrical characteristics of a fuse.

ARRESTER,ELECTRICAL SURGE

A circuit-protecting device which provides a discharge path for abnormal surges of high potential while consuming little or no power at normal operating voltage. Excludes items which absorb continuously recurring cyclic pulses. For resistors which are sensitive to voltage changes or used as elements in surge arresters, see RESISTOR, VOLTAGE SENSITIVE. See also ABSORBER, OVERVOLTAGE; AND CUTOUT DISK, PROTECTIVE.

ARRESTER,LIGHTNING

A protective device to provide a discharge path for lightning between line and line, and/or line and ground. See also PROTECTOR, TELEPHONE.

PROTECTOR,TELEPHONE

An item specifically designed to protect the phone circuits against high potentials, such as lightning and/or abnormal electrical currents. It may include an inclosure, but does not always include the protective components such as protector blocks, heat coils, and/or fuses. Excludes items which may be used in other than telephone circuits. See also ARRESTER, LIGHTNING and FUSEHOLDER.

FUSE,PLUG

A fuse which mounts by means of a screw base.

COVER,ARRESTER PLATE

COVER,FUSE

An item designed to fully or partially enclose a fuse to prevent contact with foreign obstructions.

LIGHTNING ROD

A rod or rod assembly specifically designed to be mounted vertically on the highest point of a structure and connected to ground in such a way that it can carry a lightning discharge to ground. May include accessories such as clamps and cables.

CORONA BALL

A globular or spherical shaped electrically conductive body used to prevent corona discharge.

SHIELD,CORONA

An item designed to be positioned about a point of high potential for the purpose of redistributing electrostatic lines of force.

DISCHARGER,ELECTROSTATIC

A discharger specifically designed to reduce or remove the electrostatic charge on an item. It may be digital and may incorporate a self-checking function. See also GUN, STATIC, ELIMINATING; MATT, ELECTROSTATIC DISCHARGING; STRAP, WRIST, ELECTROSTATIC DISCHARGING; DISCHARGER, ELECTROSTATIC, AIRCRAFT.

DISK,TELEPHONE PROTECTOR

A circular plate which is a maintenance item for a telephone protector.

HOLDER,PROTECTOR BLOCK

INDICATOR,BLOWN FUSE

An item which is specifically designed to be attached to a fuse, fuse clip, or fuseholder, and to give visual indication when the fuse is blown. It does not include the fuse. See also LAMP, GLOW and ALARM, BLOWN FUSE.

FUSE LINK,ELECTRICAL

An item which forms the replaceable fusible element of an electrical fuse and is prefabricated to a specific size and rating. It may be inclosed. See also FUSE, INCLOSED LINK and FUSE, OPEN LINK.

FUSE CUTOUT,PRIMARY EXPULSION

A device designed to protect heavy duty electrical power and lighting primary circuits and equipment against excessive electrical currents by automatically de-energizing the affected section of the circuit. Consists of a fusible element and a mechanism for quick disconnect of circuit when fuse is blown. May be designed for automatic re-energizing after a predetermined time delay.

ADAPTER,FUSE

An item constructed to establish the necessary accommodations to connect a fuse to a fuseholder whose design or function will not normally warrant their connection and/or to limit the current rating of the fuse to be used in conjunction with the fuseholder.

RETAINER,FUSE

An item designed to be placed over the clips of a FUSEHOLDER (as modified) to prevent the fuse(s) mounted therein from being thrown from the clips under conditions of severe vibration or shock. Excludes CLAMP, ELECTRICAL; CLIP, ELECTRICAL; FUSEHOLDER (as modified); and SHELL, FUSE.

SHELL,FUSE

The inclosing case which houses the fusible element of a renewable electrical fuse. Exludes FUSEHOLDER (as modified) and RETAINER, FUSE.

FUSE BOX

An enclosure which includes, mounts, and protects one or more FUSEHOLDER. It is designed for and may include a cover. May also include electrical fuses, mounting hardware, lock(s), conduit fittings, and terminal board(s) used specifically for terminating the fuses or fuseholders. For boxes containing combinations of different electrical devices, such as switches, jacks, fuseholders, connectors, circuit breakers, terminal boards, and the like, see DISTRIBUTION BOX. For boxes designed to mount but which do not include fuseholders, see JUNCTION BOX. Excludes CHAMBER, CABLE TERMINAL; FUSEHOLDER; and TERMINAL BOX.

FUSE,OPEN LINK

A fuse in which the element is not inclosed. It does not contain an alarm indication of the element being severed. See also FUSE LINK, ELECTRICAL and FUSE, INCLOSED LINK.

FUSE LINK,THERMAL

A replaceable, protective, current carrying element for heaters, heat ducts, and like items. It is designed with fusible material which will melt at known ambient temperatures and disconnect the item from its power source. See also LINK, FUSIBLE, FIRE.

ABSORBER,OVERVOLTAGE

An item specifically designed to absorb and consume surges of voltage such as that resulting across contacts when breaking a circuit having an inductive load or a burst of static across a telephone receiver. It is connected in parallel with the item it is protecting. It may be made up of metallic rectifier cells or semiconductor devices connected back-to-back which may or may not be shunted by a capacitor. It may also be a single rectifier cell or semiconductor device shunted by a capacitor. Excludes metallic rectifiers which are rated for rectifying capabilities and all single unit semiconductor devices not shunted by a capacitor. For items perfoming this function by use of voltage sensitive resistors, see RESISTOR, VOLTAGE SENSITIVE. See also CUTOUT DISK, PROTECTIVE.

HOLDER,ELECTROSTATIC DISCHARGER

A holder for a DISCHARGER, ELECTROSTATIC.

FUSEHOLDER,BLOCK

A fuseholder in which the fuseholder stud and/or clips and insulation are mounted on a flat base. Excludes FUSEHOLDER, RECEPTACLE.

FUSEHOLDER,EXTRACTOR POST

A fuseholder in which the clips or contacts for electrical connection to the fuse are mounted in a tubular body or similar inclosure which surrounds the fuse. It generally contains a removable cap or knob. It includes in-the-line type and those designated as miniature type FUSEHOLDER (as modified).

FUSEHOLDER,RECEPTACLE

A fuseholder which is specifically designed to accommodate one or more FUSE, PLUG. Excludes FUSEHOLDER, BLOCK.

WORK STATION KIT,ELECTROSTATIC CONTROL

A grouping of static dissipative items, such as rigid or soft table and/or floor mats, grounding kit ionizing blower, wrist strap with a current limiting resistor and the like. The portable or permenant clean and/or nonclean room configeration to protect static sensitive electronic components and devices from damage caused by electrostatic discharge from personnel.

MAT,ELECTROSTATIC DISCHARGING

An item designed to be placed under equipment, components, or personnel to form a floor, desk, table, work bench, or the like covering, to dissipate static electricity charges. It will have a means to be connected to the equipment or person from which the static electricity charge is dissipated. For floor coverings used for other than electrostatic discharging, see MAT, FLOOR. See also DISCHARGER, ELECTROSTATIC.

STRAP,WRIST,ELECTROSTATIC DISCHARGE

An item designed to be worn around the wrist to dissipate static electricity from a person's body and prevent damage to the components or equipment being handled. It has provisions for connection to the equipment, grounding mat, work bench, or the like. It may or may not include the LEAD, ELECTRICAL.

CAP,FUSEHOLDER

An item designed to mechanically and electrically accommodate and position a FUSE (1), CARTRIDGE installed in a FUSEHOLDER (1), EXTRACTOR POST. Excludes FUSEHOLDER SUBASSEMBLY.

FUSE ASSORTMENT

Two or more of the same or different types of FUSE (as modified) of different characteristics grouped together in a single package.

DISCHARGER,ELECTROSTATIC,AIRCRAFT

An item specifically designed to reduce or remove the build up of static electricity on a fixed or rotating winged aircraft. Excludes DISCHARGER, ELECTROSTATIC (INC 01905).

ARRESTER ASSEMBLY,ELECTRICAL SURGE

Two or more ARRESTER, ELECTRICAL SURGE having a common mounting or mounted on each other. It may or may not include terminals, binding posts or the like, for establishing electrical connection.

LIMITER,INRUSH CURRENT

An item designed to limit the inrush current in electric circuits that are under inductive and/or capacitive loads. It limits the current input during the transient to an authorized level and may include passive and active components such as relays, resistors, diodes and solid-state circuits.

PROTECTOR,OVERLOAD

A resistive component with a temperature coefficient which keeps a positive value. It is designed to provide an overload protection to an electric/electronic circuit. In case of an overload it reduces the current flow to a small residual value which switches the circuit off as the internal conductive paths of the component are interrupted by means of heat. The process is reversible so that the original condition is restored after cooling or interruption of the current flow. Exludes RESISTOR, THERMAL.

CUTOUT DISK,PROTECTIVE

An item specifically designed to be used with lamps in series circuits to provide circuit continuity when a lamp fails.

PROTECTOR,SERIES CIRCUIT

An item specifically designed to be used in series transformer circuits for prevention of open circuit run-away voltages.

FUSEHOLDER SUBASSEMBLY

The components of a fuseholder which together form the carrier to hold a fuse in position to provide electrical contact, but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

COUPLING,LIGHTNING ROD

An item mounted on a LIGHTNING ROD as a coupling, used to disconnect the rod from the grounding device to measure grounding resistance.

CONTACT SET,INTERRUPTER

A grouping of two or more separate interrupter contacts. Excludes CONTACT ASSEMBLY, ELECTRICAL.

SOLENOID,ELECTRICAL

An item consisting of one or more coils surrounding an iron core. The coil(s) and the core are moveable in relation to each other. The axial or rotary movement is a result of the magnetic flux of the coil. It is designed to convert electrical energy into mechanical energy. It does not include switch contacts. See also RELAY, ELECTROMAGNETIC, and ELECTROMAGNETIC ACTUATOR.

RELAY ASSEMBLY

Two or more RELAYS (as modified) having a common mounting or mounted on each other. If item contains electronic components see ELECTRONIC COMPONENT ASSEMBLY. Excludes AMPLIFIER-RELAY ASSEMBLY; RELAY ASSEMBLY GROUP; and RELAY-SWITCH.

RELAY SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other, which together form a portion of a relay, but which in itself is not a complete functioning item and cannot be assigned a more definite item name. Excludes CONTACT ASSEMBLY, ELECTRICAL and CONTACT SET, RELAY.

ELECTROMAGNETIC ACTUATOR SUBASSEMBLY

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of an ELECTROMAGNETIC ACTUATOR, but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

ELECTROMAGNETIC ACTUATOR

An item which develops mechanical energy as a result of momentary or intermittent impulses in a Coil (1) or ELECTROMAGNET and which is used to operate such items as a ratchet or signaling device. For items having a core axially set within a coil and in which the coil and core move with respect to each other, see SOLENOID, ELECTRICAL. See also MOTOR (as modified) and ANNUNCIATOR.

STOP,ARMATURE

An item designed to check the movement or action of an armature.

CONTROL,INTERLOCK

A device that determines the mode of operation of an interlock system.

RELAY,MOTOR DRIVEN

A relay which is actuated by an electrical motor and automatically resets upon interruption of supply current to the relay. Does not include a "switch" that is motor driven.

RELAY,THERMAL

A relay switch which is actuated by the effect of internal heat generated by the current in its energizing circuit. For items actuated by ambient, rather than internal temperature changes, see SWITCH, THERMOSTATIC.

RELAY,METER MOVEMENT

A relay which operates by means of a D'Arsonval or similar meter type actuation.

RELAY,ROTARY

A relay whose contact arm may rotate through 360 degrees but not in one operation. Includes rotary relays which automatically reset. For an item having the dual functions of a switch and a relay assembled together on a common mounting, see RELAY-SWITCH. Excludes SWITCH, ROTARY; SWITCH, STEPPING; and SWITCH, TELEPHONE (as modified).

SOLENOID ASSEMBLY

Two or more SOLENOID, ELECTRICAL on a common mounting or mounted on each other.

FLASHER,THERMAL

An item designed to complete, interrupt or change the connections in one or more electrical lighting circuits in accordance with a predetermined time cycle. It is actuated by the effect of heat generated by current passing through its circuit(s). Excludes CONTROL, DIRECTIONAL SIGNAL LIGHT, AUTOMOTIVE, and SWITCH THERMOSTATIC. See also FLASHER, SOLID STATE.

ARMATURE,ELECTROMAGNETIC ACTUATOR

An item which is the pivoted or spring-mounted iron portion of an electromagnetic actuator and which transmits mechanical energy to another item.

ARMATURE,INDUCTION COIL

An item which is the pivoted or spring-mounted ferromagnetic portion of an induction coil, and which moves to break and/or make an electrical circuit in response to electromagnetic changes.

ARMATURE,RELAY

An item which is the pivoted or spring-mounted ferromagnetic portion of a relay, and which moves to break and/or make an electrical circuit in response to electromagnetic changes.

CONTACT SET,RELAY

A grouping of two or more separate relay contacts.

BRACKET,SOLENOID

COVER,ELECTRICAL RELAY

LINK,SOLENOID

CHOPPER,ELECTRONIC

An electromechanical or electronic (includes solid state semiconductor items) device designed to convert an electrical signal into a modified square wave output signal. For items excited by an alternating current, the output signal is the same frequency as, and bears a definite phase relationship to, the excitation voltage. For those electronic items designed to operate on direct current only, the output frequency of the item is dependent upon the inherent properties of the item, or the internal or external circuit constants, or the applied driving coil voltage impressed on the input signal. For an electromechanical item whose coil is designed for direct current only, see VIBRATOR, INTERRUPTER and VIBRATOR, SELF-RECTIFYING.

PLUNGER,SOLENOID

A metallic item used as a core which reacts to the magnetic flux produced by a surrounding electrical coil(s). It travels on a longitudinal plane with reciprocating motion to perform a mechanical function. It may have facilities for attaching mechanical and/or electrical items such as linkage and/or contacts. It is a maintenance part for such items as RELAY, SOLENOID; RELAY-SOLENOID, ENGINE STARTER, ELECTRICAL; and SOLENOID, ELECTRICAL.

BASE,ELECTRICAL RELAY

RELAY,RESONANT REED

An item consisting of one or more metallic reeds, mechanically resonant at a specific frequency and mounted in a permanent magnetic field. Actuation of the relay occurs when an alternating current signal at the resonant frequency of one of the reeds is introduced into a field winding. Excludes RELAY, ELECTROMAGNETIC.

RELAY,REED

A relay consisting of an energizing coil and a metallic reed switch mechanism. The reeds serve as both core and contacts, which are not hinged or pivoted and which move by flexure when acted upon by a magnetic field induced by energization of the coil. It may also include a biasing magnet. The biasing magnet, either aids or opposes the movement of the reeds and the opening or closing of the contacts. For items in which actuation is dependent on the resonant frequency of the reeds see RELAY, RESONANT REED. Excludes RELAY, ELECTROMAGNETIC.

RELAY,HYBRID

A self-contained device that performs the function of opening or closing an electrical circuit in response to electrical changes in an external circuit. It consists of a combination of semiconductor and passive circuit devices, which in turn control an integral electro-magnetic relay. Excludes relays which employ diodes, rectifiers or other passive devices to achieve contact protection or coil modification. Excludes RELAY, SOLID STATE.

RELAY,SOLID STATE

A self-contained device that performs the function of opening or closing an electrical circuit in response to electrical changes in an external circuit. In lieu of separable contacts and their actuator(s), the switching function is accomplished by means of an arrangement of semiconductors and passive circuit devices. The device is designed to have electrical isolation between control circuit and output circuit. Excludes RELAY, HYBRID.

RELAY,ELECTROMAGNETIC

A relay which is actuated by the effect of a magnetic field developed by the current in its energizing coil(s). Includes solenoid and armature types. Excludes CONTACTOR, MAGNETIC; RELAY, METER MOVEMENT; RELAY, MOTOR DRIVEN; RELAY, REED; RELAY, RESONANT REED; RELAY, ROTARY; and SWITCH, STEPPING.

PARTS KIT,SOLENOID PLUNGER

FLASHER,SOLID STATE

An item designed to complete, interrupt or change the connections in one or more electrical lighting circuits in accordance with a predetermined time cycle. It is actuated by means of an arrangement of semiconductors and/or passive circuit devices. Excludes CONTROL, DIRECTIONAL SIGNAL LIGHT, AUTOMOTIVE and SWITCH THERMOSTATIC. See also FLASHER, THERMAL.

PLATE,MOUNTING

A metallic or nonmetallic item which is rigid, flat and generally smooth. Its thickness is small in comparison to its length and width. It is designed for mounting another item and may have drilled or threaded holes or other facilities for mounting to a supporting object or surface. See SUPPORT, as modified. Do not use if a more specific name applies.

MODIFICATION KIT,ELECTRICAL AND ELECTRONIC EQUIPMENT

An item or collection of items employed to modify electrical and electronic equipment.

RELAY ASSEMBLY GROUP

A group that provides facilities for switching and controlling components of an electronic set, by means of relays and associated components that are in turn programmed by signals derived from another component(s).

RETAINER,ELECTRICAL RELAY

An item specifically designed to position and/or restrain the movement of one or more electrical relays in their normal mounting position. It may also include provisions for mounting terminal boards, connectors, and like items. Excludes CLIP, ELECTRICAL and CLAMP, LOOP.

SOLENOID SUBASSEMBLY

Two or more different types of items, which together form a portion of a SOLENOID, ELECTRICAL. These items have a common mounting or are mounted on each other, but do not form a complete functioning item and therefore cannot be assigned a more definite name.

RELAY,CONTROL-MONITORING

An electronic relay that manages simple automation systems. It may be directly programmed using front panel and pushbutton, or operate by remote controlby addition of communication or connection interface. It may be easily upgraded for enhanced performance by adding various extensions for communication networks or for increasing the number or inputs/outputs.

EXPANDER MODULE,RELAY,CONTROL-MONITORING

An auxillary component used to increase the communication capabilities and/or number of discrete inputs/outputs of the RELAY, CONTROL MONITORING. It may be mounted and wired next to relay or plug into the relay.

DEMAGNETIZER

An item specifically designed to remove magnetism from another item. For items specifically designed to disorientate the magnetic signal induced on tape or wire in preparation for the recording of another signal, see ERASER, MAGNETIC.

CHARGER,MAGNET

An item specifically designed to restore or establish the field strength of a permanent magnet by energizing it with an electrical current.

TRANSFORMER,PULSE

A transformer designed to transfer pulses of nonsinusoidal wave forms between circuits without basically changing the wave forms.

GONIOMETER,ELECTRICAL

An item designed to calculate and resolve, continuously and electrically, mathematical problems or electrical functions, and to establish directional phase differences between two transmitted or received signals. Two windings are crossed and fixed at a 90 degree angle; the third winding is rotatable with respect to the other windings. Excludes RESOLVER, ELECTRICAL; and SYNCHRO (as advised).

COIL ASSEMBLY,RADIO FREQUENCY

Two or more coils on a common mounting or mounted on each other. Excludes items inductively coupled.

TRANSFORMER ASSEMBLY

Two or more separable TRANSFORMER (as modified) on a common mounting or mounted on each other.

TRANSFORMER,POTENTIAL

A transformer designed to connect an electrical instrument to a power line or other high potential alternating current source for the purpose of voltage measurement or control.

FORM,COIL

An item specifically designed to form the foundation on which a coil is wound.

COVER,COIL

COVER,ELECTRICAL TRANSFORMER

REACTOR

A coil or coils usually constructed with cores having low magnetic reluctance, whose primary purpose is to furnish an inductive impedance in power or audio frequency circuit ranging from zero to 20 kilohertz (kilocycles). Includes audio frequency and power filter chokes, audio reactors and swinging chokes. Does not include transformers or coils used above audio frequency range. Excludes SATURABLE REACTOR. For reactors with air cores, see COIL (as modified).

TRANSFORMER,CURRENT

An item consisting of one or more windings, designed to be placed near or connected in series with an alternating current power line to measure the current passing through the line by means of a meter; or to control the current passing through the line by means of a control device. Excludes TRANSFORMER, POWER, CURRENT REGULATING.

TRANSFORMER,RADIO FREQUENCY

An item having either a single tapped winding (autotransformer type), or two or more windings designed to furnish inductive reactance and/or transfer electrical energy in circuits by means of a magnetic field. It is so designed that its entire intended range of operations is above 20 Kilohertz (Kilocycles). The minimum value may extend into the audio frequency range (below 20 Kilohertz). It may include integral capacitors, coils, resistors, and adjustable tuning cores. For items having only two active terminals see COIL, RADIO FREQUENCY. Includes types having windings which may be moved with respect to each other. Excludes TRANSFORMER, DISCRIMINATOR.

TRANSFORMER,AUDIO FREQUENCY

A transformer which is designed so that part or all of its range of operating frequencies is 20 kilohertz (kilocycles) and below. The maximum value may extend into the radio frequency range. It is generally used in the input, output, amplifier, or oscillator stages of audio and sonar devices.

TRANSFORMER,POWER,VIBRATOR

A transformer consisting of two or more windings designed for use with a vibrator for stepping up or down pulsating direct current voltages. May also have provisions for alternating current input voltages. Excludes TRANSFORMER, PULSE.

SHIELD,COIL

An item specifically designed to be placed around a coil for the purpose of shielding against electrical or mechanical interference. May include mounting facilities. See also COVER (as modified); HOUSING (as modified) and VISOR (as modified).

ELECTROMAGNET

A winding with a soft, laminated, or pressed powdered iron core, which generates an extremely strong field of magnetic force when current is passed through the winding. The field dissipates almost completely when the current is interrupted. For electric magnets used for lifting, see MAGNET, LIFTING, ELECTRIC.

REACTOR-TRANSFORMER

A component consisting of two or more electrically distinct items. One or more items are made of one or more coils which function as a reactor; at least one other item is made of a tapped coil or two or more coils which function as a transformer. The items may have a common core, but are not magnetically coupled.

COIL,RADIO FREQUENCY

An item consisting of a partial turn as one or more turns of wire or other conductive material which constitutes one continuous untapped winding. It may be wound or formed in other than a circular manner and may be self-supporting, requiring no coil form. It is specifically designed to furnish inductive reactance in a circuit carrying radio frequency current ranging from 20 kilohertz (kilocycles) and above. It may include tuning devices, integral resistors and capacitors; however, excludes FILTER (as modified). The coil has only two electrical terminals. For items having tapped winding or more than one winding - see TRANSFORMER, RADIO FREQUENCY. For coils wound on resistors, which are designed to be inserted in the circuit of a radio frequency stage to suppress high frequency parasitic oscillations, see SUPPRESSOR, PARASITIC.

CASE,COIL

A case specifically designed to hold one or more coils.

CASE,MAGNET CHARGER

Changed the (AEUSA) on 060117 to US usage.

SATURABLE REACTOR

An item whose inductance value is controlled by electrical means. It depends on the action of the electromagnet flux produced by the control winding upon the effective permeability of the core. It contains two or more windings, at least one of which must be a control winding. For items designed to be used in conjunction with a rectifier(s) for amplification purposes, see AMPLIFIER, MAGNETIC.

TRANSFORMER,DISCRIMINATOR

A transformer designed to be used in a stage where frequency modulation signals are converted directly to audio frequency signals or in a stage where frequency changes are converted to corresponding voltage changes. May include capacitors, resistors and/or coils as integral parts.

TRANSFORMER SET

A grouping of two or more individual TRANSFORMER (as modified). Includes matched pairs. For items which are mounted on a common mounting or mounted on each other, see TRANSFORMER ASSEMBLY.

CONTROL,ELECTRICAL GONIOMETER

Changed the (AEUSA) on 06/20/17 to include US usage.

CASE,ELECTRICAL TRANSFORMER

ROTOR,ELECTRICAL GONIOMETER

An item consisting of the rotating part of a GONIOMETER, ELECTRICAL.

COIL,ELECTRICAL

An item generally consisting of one or more turns of wire or similar conductive material (in special cases it may be considered as a partial turn). It is specifically designed to concentrate magnetic flux generated by the flow of an electric current, to induce in itself an electromotive force, and to add or subtract inductive reactance in a circuit. It may include tuning devices, integral resistors and capacitors; however, excludes FILTER (as modified). For coils wound on resistors which are designed to be inserted into the circuit of a radio frequency stage to suppress high frequency parasitic oscillations, see SUPPRESSOR, PARASITIC..

COIL,TELEPHONE

An item consisting of one or more turns of wire or similar conductive material. It is specifically designed for use in telephone circuitry for reducing cross talk by balancing capacitances, or impedance matching or providing inductive reactance for overcoming inherent capacitance, or inductive coupling where direct coupling is undesirable or discriminating against the flow of alternating current in favor of direct current.

TRANSFORMER,POWER

A transformer consisting of one or more primary winding(s) and one or more secondary winding(s). It may be designed for direct connection to an alternating current source for purposes of changing the secondary volts and amperes or designed to eliminate metallic interconnection between circuits in an overall one to one voltage ratio, with or without additional output windings, or items designed to automatically maintain a constant output voltage within specified limits under varying input or load conditions. Also includes items having a provision for mechanically changing the turns ratio or inductive coupling in progressive increments by means of voltage taps, ratio adjuster, or devices oe similar design. For transformers having winding(s) common to both input and output circuits, see TRANSFORMER (1), POWER, AUTOTRANSFORMER. Excludes TRANSFORMER (1), PULSE.

TRANSFORMER,POWER AUTOTRANSFORMER

A transformer which incorporates the primary and secondary functions into a single winding, which is common to both input and output circuits, and is designed to change the relationship of volts and amperes between the entire winding and its taps. Includes multiple winding transformers of like design and items in which a variation of the turns ratio or inductive ratio of inductive coupling is accomplished by connection to fixed terminals. Also, includes items having a provision for mechanically changing the turns ratio in progressive increments, by means of a shaft, voltage taps, ratio adjuster, or devices of similar design. Excludes TRANSFORMER (1), POWER; TRANSFORMER (1), PULSE.

COIL ASSEMBLY,ELECTRICAL

Two or more COIL, ELECTRICAL on a common mounting or mounted on each other. Excludes items inductively coupled. For items inductively coupled, see TRANSFORMER (as modified).

PLATE,MOUNTING

A metallic or nonmetallic item which is rigid, flat and generally smooth. Its thickness is small in comparison to its length and width. It is designed for mounting another item and may have drilled or threaded holes or other facilities for mounting to a supporting object or surface. See SUPPORT, as modified. Do not use if a more specific name applies.

SHIELD,TRANSFORMER

An item specifically designed to be placed around or over one or more TRANSFORMER (as modified) in order to prevent or reduce electrical and/or mechanical interference.

CORE,ELECTROMAGNETIC COMPONENT

A solid or assembled item made of ferromagnetic material and designed to be used for the construction of a COIL (as modified), a TRANSFORMER (as modified), a REACTOR (as modified) or a ELECTROMAGNET. the item increases the magnetic flux within those components.

TRANSFORMER,SYNCHRO OVERLOAD

A transformer consisting of two or more windings specifically designed for use in synchro systems with an external indicator for the detection of overloads. May include rectifiers, resistors and/or capacitors as integral parts.

SHIELDING BEAD,ELECTRONIC

A high permeability item designed to be threaded on the supply leads of electronic items for the purpose of damping parasitic resonances. See also SUPPRESSOR, PARASITIC.

CRYSTAL UNIT SET,QUARTZ

A grouping of two or more individual quartz crystal units.

CRYSTAL UNIT,QUARTZ

An item which consists of a quartz crystal resonator(s), suitably mounted in a HOLDER, QUARTZ CRYSTAL.

HOLDER,QUARTZ CRYSTAL

An item designed to mechanically and electrically accommodate one or more crystal plates. It may include integral facilities for temperature control and/or capacitor(s). See also HOLDER, SEMICONDUCTOR DEVICE.

OSCILLATOR,PULSE DELAY

An electronic device which generates alternating current power at a frequency(ies) determined by the values of certain constants in its circuits. It is characterized by a network in the input and/or output circuits which causes a delay in transmission of a trigger pulse of predetermined width for a definite time interval. See also DELAY LINE.

COVER,OSCILLATOR

RETAINER,CRYSTAL HOLDER

An item of unusual or unique construction specifically designed to restrain the movement of a HOLDER (1), CRYSTAL UNIT when mounted in another item.

HOLDER,CRYSTAL UNIT

A holder designed to be used with a crystal unit. For those items which contain provisions for gripping terminals, see SOCKET (as modified). See also HOLDER, SEMICONDUCTOR DEVICE.

CASE,CRYSTAL UNIT

CASE,CRYSTAL UNIT SET

OSCILLATOR SUBASSEMBLY

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of an oscillator but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

OSCILLATING GROUP

A collection of items, which when used with an electronic set provide facilities for a complete OSCILLATOR (1), CRYSTAL CONTROLLED OR OSCILLATOR (1) NON-CRYSTAL CONTROLLED.

OSCILLATOR,CRYSTAL CONTROLLED

An oscillator whose operating frequency(ies) is controlled by a CRYSTAL UNIT, QUARTZ. For an oscillator controlled by a device other than a crystal, see OSCILLATOR (1), NONCRYSTAL CONTROLLED. See also GENERATOR, SIGNAL; and CALIBRATOR, FREQUENCY. Excludes FREQUENCY SUPPLY, TELEPHONE CARRIER; RESONATOR, TUNING FORK; and OSCILLATOR, PULSE DELAY.

OSCILLATOR,NONCRYSTAL CONTROLLED

An oscillator whose operating frequency(ies) is controlled by an electronic device other than a CRYSTAL UNIT, QUARTZ. For an oscillator controlled by a crystal, see OSCILLATOR (1), CRYSTAL CONTROLLED. See also GENERATOR, SIGNAL; and CALIBRATOR, FREQUENCY. Excludes FREQUENCY SUPPLY, TELEPHONE CARRIER; RESONATOR, TUNING FORK; and OSCILLATOR, PULSE DELAY.

OVEN,ELECTRICAL-ELECTRONIC COMPONENTS

An electrically heated compartment designed to accommodate and maintain at an essentially constant temperature, one or more components, such as, CRYSTAL UNIT(S), QUARTZ; tuned circuits; integrated circuit devices; and semiconductors. It prevents frequency drift and changes in teperature.

COVER,QUARTZ CRYSTAL HOLDER

DETECTOR,PROXIMITY,INDUCTIVE

A device which uses an oscillator generated alternating magnetic field to detect the presence and/or position of foreign objects within a limited field of view. The item's field of view is very small when compared to security type motion detectors. See also; TRANSDUCER, MOTIONAL PICKUP (6695); and MOTION DETECTOR (6350).

CRYSTAL,CERAMIC,TRANSDUCER

A synthetic fabricated piezoelectric item which, upon completion of all manufacturing processes is designed for use in an electromechanical transducer. It may include electrodes adherent to the crystal.

ELECTRON TUBE

An inclosure, including two or more electrodes, in which a flow of electrons may occur through a vacuum or a contained gas. The electronic conduction takes place either by means of electrons emitted from a cathode or by ionization of the contained gas. Includes phototubes (photoemissive type only), Geiger-Mueller tubes, traveling wave tubes, cathode ray tubes and microwave tubes (Klystron, magnetron, or the like). Excludes items whose primary purpose is to produce light energy. Also excludes PHOTOELECTRIC CELL; and SEMICONDUCTOR DEVICE (as modified).

ADAPTER,VISOR,CATHODE RAY TUBE

An adapter constructed to establish the necessary accommodations to mount a cathode ray tube visor to an item whose physical design does not normally provide for that connection.

VISOR,CATHODE RAY TUBE

An item specifically designed to be attached around the face of a cathode ray tube to exclude light, thereby aiding visibility of the image.

CASE,ELECTRON TUBE

A case specifically designed to hold one or more electron tubes. For cases specifically designed to inclose magnetic items, such as magnetron type electron tubes, for shipping and storage, see CASE, SHIPPING AND STORAGE, MAGNETICALLY SHIELDED.

COUPLER,ELECTRON TUBE

A coupler specifically designed to be inserted between an electron tube, such as a magnetron, and another item, such as a transmission line.

SHIELD,ELECTRON TUBE

An item specifically designed to be placed partially or completely around an electron tube for the purpose of shielding against electrical or mechanical interference or physical damage. May include mounting facilities. See also COVER (as modified); HOUSING (as modified) and VISOR (as modified).

DELAY TUBE

An item consisting of thermo-sensitive resistor(s) and an equal number of heaters inclosed in a hermetically sealed envelope. It is primarily designed to provide a predetermined time delay for electrical signals.

ION TRAP,CATHODE RAY TUBE

A magnetic or electromagnetic device designed to be attached to the outer surface of a cathode ray tube for the specific purpose of preventing the negatively charged ions from reaching the luminescent cathode ray tube screen. It is used as a preventative measure against ion screen discoloration.

DUMMY ELECTRON TUBE

An item designed to be substituted for an electron tube while its associated circuits are under alignment or test. It is similar to its operating counterpart inasmuch as its mounting facilities and conducting surfaces are identical. The specific purpose of the item is to make the normal interconnections between the contacts of the engaging electron tube socket without providing any of the additional functions commonly attributed to an electron tube. See also ADAPTER, TEST.

RETAINER,ELECTRON TUBE

An item specifically designed to restrain the movement of an electron tube when the latter is mounted in another item, normally a tube socket. Includes clamps, clips, and similar restraining devices specifically designed for this function.

SHIELD,ELECTRON TUBE,MULTIPLE

An item specifically designed to be placed over two or more ELECTRON TUBE for purpose of shielding against electrical and/or mechanical interferences. See also SHIELD, ELECTRON TUBE.

ELECTRON TUBES,MATCHED

A grouping of two or more separate electron tubes which have been matched together for a given characteristic such as transconductance. The matched values must be equal or within a specified tolerance. Includes only those tubes designed and specifically tested to provide a desired function. Excludes transistors, semiconductor devices and electron tubes which may be of an identical type but do not meet the above requirements.

INSERT,ELECTRON TUBE SHIELD

A metallic item specifically designed to be inserted into a SHIELD, ELECTRON TUBE and to contact the electron tube envelope for the purpose of dissipating heat by conduction to the tube shield.

HARNESS,CATHODE RAY TUBE

An item consisting of adjustable straps or bands specially designed for supporting and positioning a cathode ray tube.

RECTIFIER,SEMICONDUCTOR DEVICE

Two or more interconnected SEMICONDUCTOR DEVICE (1), DIODE arranged in stack(s) for use in power supplies to change alternating current to direct current. For items containing material such as selenium or copper oxide, see RECTIFIER, METALLIC.

SEMICONDUCTOR DEVICE,PHOTO

A Semiconductor Device (1) which is responsive to visible or infrared radiant energy. May or may not include mounting hardware and/or heat sink. Excludes SEMICONDUCTOR DEVICE (1), DIODE; SEMICONDUCTOR DEVICE (1), THYRISTOR AND TRANSISTOR. For solid state devices which emit visible or infrared radiant energy, see LIGHT EMITTING DIODE.

TRANSISTOR

An active semiconductor device with three or more electrodes. May or may not include mounting hardware and/or heatsink. Excludes SEMICONDUCTOR DEVICE, DIODE and SEMICONDUCTOR DEVICE, THYRISTOR. For solid state devices which are responsive to visible or infrared radiant energy, see SEMICONDUCTOR DEVICE, PHOTO.

SEMICONDUCTOR DEVICE,DIODE

A two electrode semiconductor device having an asymmetrical voltage - current characteristic. May or may not include mounting hardware and/or heatsink. Excludes LIGHT EMITTING DIODE and SEMICONDUCTOR DEVICE,PHOTO. For items containing material such as selenium and copper oxide, see RECIFIER, METALLIC.

SEMICONDUCTOR DEVICE SET

A grouping of two or more individual semiconductor devices, such as transistors, diodes, and photo semiconductor devices. It includes matched pairs. Excludes ABSORBER, OVERVOLTAGE; SEMICONDUCTOR DEVICE ASSEMBLY. For interconnected items functioning as power supply rectifiers, see RECTIFIER, SEMICONDUCTOR DEVICE.

HOLDER,SEMICONDUCTOR DEVICE

An item designed to mechanically and electrically accommodate and position a SEMICONDUCTOR DEVICE (as modified), installed in a coaxial line or waveguide system for use as a nonlinear circuit element microwave application. Excludes ADAPTER (as modified) and RETAINER, SEMICONDUCTOR DEVICE.

SEMICONDUCTOR DEVICE,THYRISTOR

A bistable semiconductor device comprising three or more junctions which is normally a nonconductor until the application of a signal to a gate terminal, at which time the device switches to the conductive state. Includes devices capable of being switched back to the nonconductive state upon application of a different signal to the same or another gate terminal. May or may not include mounting hardware and/or heatsink. For solid state devices which are responsive to visible or infrared radiant energy, see SEMICONDUCTOR DEVICE, PHOTO.

SEMICONDUCTOR DEVICE ASSEMBLY

A grouping of two or more semiconducting devices such as LIGHT EMITTING DIODE; SEMICONDUCTOR DEVICE, DIODE; SEMICONDUCTOR DEVICE, PHOTO; SEMICONDUCTOR DEVICE, THYRISTOR; and/or TRANSISTOR mounted on a common mounting or mounted on each other. The devices must be separable and each item must be capable of functioning in accordance with its given name. For assemblies consisting of semiconducting devices permanently cased, encapsulated, or potted together to form a single unit, see RECTIFIER, SEMICONDUCTOR DEVICE, UNITIZED and SEMICONDUCTOR DEVICES, UNITIZED. Excludes SEMICONDUCTOR DEVICE SET; MICROCIRCUIT ASSEMBLY; and MICROCIRCUIT SET. See also ABSORBER, OVERVOLTAGE.

COVER,SEMICONDUCTOR DEVICE

A cover specifically designed to protect a semiconductor device.

RETAINER,SEMICONDUCTOR DEVICE

An item primarily designed to position and/or restrain the movement of one or more semiconductor devices in their normal operating position. Excludes CLIP (1), ELECTRICAL; CLAMP (1), LOOP; HOLDER, SEMICONDUCTOR DEVICE; HOLDER (1), CRYSTAL UNIT; RETAINER, CRYSTAL HOLDER; and STRAP, RETAINING. See also HEAT SINK, ELECTRICAL-ELECTRONIC COMPONENT and SOCKET, PLUG-IN ELECTRONIC COMPONENTS.

SEMICONDUCTOR DEVICES,UNITIZED

Two or more discrete semiconductor devices such as diode(s) and/or transistor(s), permanently cased, encapsulated, or potted together to form an inseparable unit. Excludes devices having one or more components other than semiconductor devices. The individually distinct devices forming the unit may be internally connected. The unit in itself does not perform a complete specific function and cannot be assigned a more definite item name. It may include or consist of inseparable matched pairs. May or may not include mounting hardware and/or heatsink. For interconnected items arranged in stack(s), see RECTIFIER, SEMICONDUCTOR DEVICE. For items formed on or within a semiconductor material substrate, formed on an insulating substrate or formed on a combination of both of these types, see MICROCIRCUIT (as modified). Excludes NETWORK (as modified); ABSORBER, OVERVOLTAGE; SEMICONDUCTOR DEVICE SET; and SEMICONDUCTOR DEVICE ASSEMBLY. Do not use if more specific name applies.

RECTIFIER,SEMICONDUCTOR DEVICE,UNITIZED

Two or more diode semiconductor devices designed to function as a unit in changing alternating current to direct current. The diode devices are internally connected in series, and are permanently cased, encapsulated, potted, or molded together to form an inseparable unit. These units may be designed as either half-wave or full-wave rectifiers and may be mounted to form either single phase or three phase bridges. For interconnected items arranged in stack(s), see RECTIFIER, SEMICONDUCTOR DEVICE. For items fabricated in the form of a monolithic or thin film structure that perform the function of a circuit, see INTEGRATED CIRCUIT (as modified). Excludes SEMICONDUCTOR DEVICES, UNITIZED; SEMICONDUCTOR DEVICE ASSEMBLY; and RECTIFIER NETWORK, UNITIZED.

DUMMY PLUG,TELEPHONE

An item designed to be inserted into a JACK, TELEPHONE for the purpose of shorting, loading, or to occupy the space of a PLUG, TELEPHONE. It is not designed for direct attachment to a cable, conduit, or wire, and cannot be used as a PLUG, TELEPHONE.

JACK ASSEMBLY,TELEPHONE

An item consisting of two or more telephone jacks on a common mounting or mounted on each other. May include wiring or associated parts such as designation strips. Connection to related circuitry is not automatic with mounting. For items which connect to related circuitry automatically, see TELEPHONE CIRCUIT, LINE JACK.

JACK,TELEPHONE

A contact spring type electrical fitting of two or more conductors, which is arranged for the insertion of a PLUG, TELEPHONE. One conductor may be grounded. Does not include separable telephone jacks which are termed, JACK ASSEMBLY, TELEPHONE. Excludes JACK, TIP.

PLUG,TELEPHONE

A concentric type electrical fitting consisting of two or more conductors on a common shank. The contacts on two or three conductor plugs are termed sleeve, tip, or ring. It includes multiple shank plugs of this type. Excludes PLUG, TIP.

ADAPTER,INDICATOR

An adapter which permits a remote indicator to be connected to an electronic set with which it was not normally intended to be used. Do not use if a more specific name exists. See also COUPLER (as modified).

COVER,TELEPHONE JACK ASSEMBLY

CONNECTOR,PLUG,ELECTRICAL

An electrical fitting with electrical contacts, constructed to be affixed to the end of a cable, conduit, coaxial line, cord or wiring for convenience in joining with other electrical connector(s) or PRINTED WIRING BOARD and is not designed to be mounted on a bulkhead, chasses, panel, PRINTED WIRING BOARD, or the like. Excludes JACK, TELEPHONE; JACK, TIP; PLUG, TELEPHONE; PLUG TIP; INSERT, ELECTRICAL CONNECTOR; CONNECTOR BODY (as modified); and SOCKET, PLUG-IN, ELECTRONIC COMPONENTS. See also LEAD ASSEMBLY, ELECTRICAL; WIRING HARNESS (as modified); and CABLE ASSEMBLY (as modified). For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

SHELL,TELEPHONE JACK ASSEMBLY

The inclosing case which houses the electrical elements of a telephone jack assembly.

RETAINER,ELECTRICAL CONNECTOR

An item specifically designed to restrain the movement of an electrical connector, when the latter is mounted in another item. Includes clamps, clips, and similar restraining devices specifically designed for this function. Excludes CLIP, ELECTRICAL and CLAMP, LOOP.

ADAPTER,CONNECTOR TO LAMP BASE

An electrical fitting designed to connect one or more lamps or lampbases to an electrical CONNECTOR (as modified). May include integral switch or side wire outlet. Excludes ADAPTER, LAMPHOLDER TO CONNECTOR.

ADAPTER,LAMPHOLDER TO CONNECTOR

An electrical fitting designed to provide the necessary accommodations to attach a LAMPHOLDER to one or more electrical CONNECTOR (as modified). May include a fuse and/or integral switch; may also accommodate one or more LAMP (as modified). Excludes ADAPTER, CONNECTOR TO LAMPBASE.

PLUG,TIP

A banana or pin type termination applied to the end of a single electrical conductor and designed to be inserted in a jack or binding post. May be insulated or uninsulated. Excludes TIP, TEST PROD and PLUG, TELEPHONE.

COVER,ELECTRICAL CONNECTOR

A device specifically designed to fully or partially inclose an electrical connector to protect its mating end from mechanical damage. Excludes CAP, ELECTRICAL; CAP, PROTECTIVE, DUST AND MOISTURE SEAL; and GUARD, ELECTRICAL CONNECTOR. See also COVER AND GUARD, ELECTRICAL CONNECTOR; SHELL, ELECTRICAL CONNECTOR; and SHIELD, ELECTRICAL CONNECTOR.

JACK,TIP

An electrical fitting with a female contact arranged for the insertion of a PLUG, TIP or a TIP, TEST PROD. It has a single facility for attachment of a conductor or facility for circuit connection through its mounting provisions. The item may or may not be insulated. Excludes multisection types each section of which consists of a single contact spring or telephone-type jack. Excludes CONNECTOR, RECEPTACLE ELECTRICAL; JACK, TELEPHONE; JACK ASSEMBLY, TIP; and POST, BINDING.

JACK ASSEMBLY,TIP

Two or more JACK, TIP on a common mounting. The jacks must be separable and capable of operating individually. For items in which the jacks are inseparable, see CONNECTOR, RECEPTACLE, ELECTRICAL.

PLUG ASSEMBLY,TIP

An item consisting of two or more PLUG, TIP on a common mounting. The plugs must be separable and capable of operating individually. For items in which the plugs are inseparable, see CONNECTOR (as modified).

ADAPTER,CONNECTOR

An adapter with electrical contacts which provides facilities for joining two or more electrical connectors, whose design or function will not normally warrant their junction.It is not designed for permanent attachment to a cable, cord, coaxial line, or wire.The physical shape of an electrical connector should not be the determining factor of its name.Tee, angle, straight, and Y-shaped adapters are all ADAPTER, CONNECTOR.Excludes ADAPTER, CONNECTOR TO LAMPBASE; ADAPTER, LAMPHOLDER TO CONNECTOR; ADAPTER (1), CABLE CLAMP TO CONNECTOR; and ADAPTER, LAMPHOLDER.For items designed as a mechanical connection between an electrical conduit and an electrical connector, see ADAPTER (1), ELECTRICAL CONDUIT.

DUMMY CONNECTOR,RECEPTACLE

An item specifically designed to mate with a plug connector to perform one or more special functions, such as to support a plug connector when not in use, short contacts, or open or close electrical circuits, in or on another connector. It does not have provisions for attaching a wire, cable, or contact. It is designed to mount on a panel, bulkhead, wall, or chassis. It does not include connector shells which are merely used to position a plug connector on a panel.

CONNECTOR,RECEPTACLE,ELECTRICAL

An electrical fitting with electrical contacts constructed to be affixed to the end of a cable, conduit, coaxial line, cord, wire (includes printed/etched), PRINTED WIRING BOARD, or the like for convenience in joining with another electrical connector(s) or PRINTED WIRING BOARD. It is designed to be mounted on a bulkhead, chassis, panel, wall, PRINTED WIRING BOARD, or the like. Excludes LAMPHOLDER; JACK, TELEPHONE; JACK, TIP; INSERT ELECTRICAL CONNECTOR; INSERT MODULE, ELECTRICAL CONNECTOR; CONNECTOR BODY (as modified) and SOCKET, PLUG-IN ELECTRONIC COMPONENTS. See also WIRING HARNESS (as modified) and CABLE ASSEMBLY (as modified). For items with termination wires of more than four inches in length, see LEAD ASSEMBLY, ELECTRICAL. For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

DUMMY CONNECTOR,PLUG

An item specifically designed to mate with another connector to perform one or more special functions, such as to act as a cover or shield, to short contacts, or to open or close electrical circuits, in or on another connector. It cannot be used as a CONNECTOR, PLUG, ELECTRICAL. Excludes DUMMY PLUG,TELEPHONE.

JACK BOX

An enclosure which includes, mounts, and protects one or more jacks. It is designed for and may include the cover and such accessories as mounting hardware, brackets, locks, and conduit fittings. May include terminal boards specifically used as a convenience for terminating the jacks. For boxes which include combinations of different electrical devices such as switches, fuseholders, jacks, circuit breakers, terminal boards and the like, see DISTRIBUTION BOX. For boxes which are designed to mount, but which do not include jacks, see JUNCTION BOX.

CONNECTOR SET,ELECTRICAL

Two or more separate CONNECTOR, PLUG, ELECTRICAL; CONNECTOR, RECEPTACLE, ELECTRICAL; ADAPTER, CONNECTOR; JACK, TELEPHONE; JACK, TIP; PLUG, TELEPHONE; PLUG, TIP; DUMMY CONNECTOR, PLUG; or DUMMY CONNECTOR, RECEPTACLE designed to be mated together. The set may include connectors of different item name mated together, such as one CONNECTOR, PLUG, ELECTRICAL and one DUMMY CONNECTOR, RECEPTACLE; or one DUMMY CONNECTOR, PLUG and one CONNECTOR, RECEPTACLE, ELECTRICAL. Excludes CONNECTOR ASSEMBLY, ELECTRICAL; DUMMY CONNECTOR SET, ELECTRICAL; JACK ASSEMBLY, TELEPHONE; JACK ASSEMBLY, TIP; and PLUG ASSEMBLY, TIP.

DUMMY CONNECTOR SET,ELECTRICAL

A grouping of two or more separate DUMMY CONNECTOR, PLUG and/or DUMMY CONNECTOR, RECEPTACLE. Includes matched or mated pairs. Excludes DUMMY CONNECTOR ASSEMBLY, ELECTRICAL.

NUT,BUSHING RETAINER,ELECTRICAL CONNECTOR

A metallic item having internal threads and an internal seat designed to retain and compress a resilient sealing medium such as a backing grommet or bushing in the shell of an electrical connector. For items which may perform the same function but have a facility for attachment of another fitting(s) see ADAPTER, CABLE CLAMP TO CONNECTOR. See also PACKING NUT; and PACKING NUT, STUFFING TUBE.

CONNECTOR,ELECTRON TUBE

An electrical fitting designed to be attached to the grid and/or plate connections of an electron tube by integral fastening devices (e. g., setscrew) to provide electrical connection and heat dissipating facilities. Excludes items which affix the tube elements by spring action of the body. See also CLIP, ELECTRICAL. Excludes CONTACT, ELECTRICAL and CLAMP, ELECTRICAL.

PLATE,RETAINING,ELECTRICAL CONNECTOR

A flat metallic item varied in shape with an opening(s) to accommodate an electrical connector(s). It must have facilities for mounting. Used to position an electrical connector. See also PLATE, MOUNTING (as modified). Excludes PLATE, WALL, ELECTRICAL and ESCUTCHEON PLATE.

MOLD,POTTING,ELECTRICAL CONNECTOR

An item, solid or split, designed to be used as a hollow form into which potting compound is injected and allowed to cure or set to seal the back of an electrical connector. The potting eliminates the need for a back shell of the connector. The form may or may not be removable after potting. See also SHIELD, ELECTRICAL CONNECTOR.

CONNECTOR ASSEMBLY,ELECTRICAL

Two or more CONNECTOR, PLUG, ELECTRICAL; CONNECTOR, RECEPTACLE, ELECTRICAL; ADAPTER, CONNECTOR; JACK, TELEPHONE; JACK, TIP; PLUG, TELEPHONE; PLUG, TIP; DUMMY CONNECTOR, PLUG; or DUMMY CONNECTOR, RECEPTACLE in any combination, having a common mounting or mounted on each other, each one capable of being independently replaced. It may be interconnected by means of wire or solder bridgings. For items furnished as mated pairs or sets, see CONNECTOR SET, ELECTRICAL. Excludes DUMMY CONNECTOR SET, ELECTRICAL; JACK ASSEMBLY, TELEPHONE; JACK ASSEMBLY, TIP; PLUG ASSEMBLY, TIP; and CABLE ASSEMBLY (as modified).

DUMMY CONNECTOR ASSEMBLY,ELECTRICAL

Two or more DUMMY CONNECTOR, PLUG and/or DUMMY CONNECTOR, RECEPTACLE having a common mounting or mounted on each other. Each component is capable of being independently replaced. Excludes DUMMY CONNECTOR SET, ELECTRICAL and items furnished as matched or mated pairs.

CLAMP,CABLE,ELECTRICAL CONNECTOR

A clamp specifically designed to hold an electrical cable firmly in a connector. Must include provisions for attachment to an electrical connector. Excludes ADAPTER (1), CABLE TO CONNECTOR.

GUARD,ELECTRICAL CONNECTOR

An item specifically designed to prevent damage to the mating end of an electrical connector. The contacts of the connector mating end are left exposed for connection. Excludes COVER, ELECTRICAL CONNECTOR. See also COVER AND GUARD, ELECTRICAL CONNECTOR.

PLUG,END SEAL,ELECTRICAL CONNECTOR

A small, thin, cylindrically shaped item having a straight, smooth, solid, nonmetallic body. It may have a boss on one or both ends. It is specifically designed for sealing contact holes against moisture, dust, and the like, in electrical connectors. Excludes PLUG, END SEAL, ELECTRICAL CONDUIT; and PIN, STRAIGHT, HEADLESS.

MAINTENANCE KIT,ELECTRICAL CONNECTOR

SOCKET,PLUG-IN ELECTRONIC COMPONENTS

An item designed to electrically connect and mechanically position the base of an item having plug-in-type contacts, and to facilitate replacement of the item accommodated. It includes sockets which accommodate the contacts of capacitors, coils, crystals, electron tubes, relays, semiconductor devices and vibrators. Excludes sockets or receptacles designed to accommodate plug-in component circuit boards (printed circuit boards) and electronic modules or sub-assemblies. Also excludes heat-dissipating (not heat-sinks) sockets for mounting "power transistors".

STRAP NUT,PLUG-IN ELECTRONIC COMPONENTS SOCKET

A fastening device used in assembling and mounting SOCKET, PLUG-IN ELECTRONIC COMPONENTS to a chassis. It is made in one piece with tapped mounting holes spaced to coincide with the spacing of standard electronic plug-in components socket mounting holes. It is semicircular shaped to provide electrical contact clearance of the socket.

SOCKET,NONPLUG-IN ELECTRONIC COMPONENTS

A device under the form of a plate or having a complex geometric form, in an isolating or non-isolating material. It is designed to electrically connect and mechanically position either by welding or by fastening made with the help of clamps, studs, nuts, and the like, an electrical or electronic component which cannot be mounted on a SOCKET, PLUG-IN ELECTRONIC COMPONENTS. Do not use if a more specific item name is available.

POLARIZING KEY,ELECTRICAL CONNECTOR

An item specifically designed to be placed in a contact location or between two adjacent contacts of an electrical plug or receptacle to prohibit mismating or cross-mating of contacts.

ADAPTER,SOCKET,PLUG-IN ELECTRONIC COMPONENTS

An item constructed to establish the necessary accommodations to connect two or more items, one or both being a plug-in electronic components socket, whose physical design or function will not normally warrant their connection. Does not include ADAPTER, CONNECTOR. If terminations are provided for dynamic testing while an electronic component is inserted, see ADAPTER, TEST.

RETAINER,SOCKET,PLUG-IN ELECTRONIC COMPONENTS

An item designed to position and/or restrain the movement of one or more plug-in electronic component sockets in their normal mounting position. The retainer is not an integral part of the socket. Excludes ADAPTER, SOCKET, PLUG-IN ELECTRONIC COMPONENTS.

SOCKET ASSEMBLY,PLUG-IN ELECTRONIC COMPONENTS

A grouping of two or more plug-in electronic component sockets mounted on a common mounting or each other. A single socket is termed SOCKET, PLUG-IN ELECTRONIC COMPONENTS regardless of its complexity. See also CONNECTOR ASSEMBLY, ELECTRICAL; JACK ASSEMBLY, TELEPHONE, AND JACK ASSEMBLY, TIP.

JACKSCREW,ELECTRICAL CONNECTOR

A locking device specifically designed to secure engaged electrical connectors. Its mating end is either internally or externally threaded. It is designed to be installed in an ADAPTER (2), CONNECTOR; CONNECTOR BODY, PLUG, ELECTRICAL; CONNECTOR BODY, RECEPTACLE, ELECTRICAL; CONNECTOR, PLUG, ELECTRICAL; CONNECTOR, RECEPTACLE, ELECTRICAL; COVER, ELECTRICAL CONNECTOR; DUMMY CONNECTOR, PLUG; DUMMY CONNECTOR, RECEPTACLE; INSERT, ELECTRICAL CONNECTOR; SHELL, ELECTRICAL CONNECTOR; or a SHIELD, ELECTRICAL CONNECTOR. It may be used for polarization. It may be equipped with a knob, slotted head, knurled head, or the like.

GUIDE,ELECTRICAL CONNECTOR

An aligning device specifically designed to insure proper mating of electrical connectors. Its mating end is unthreaded. It is designed to be installed in an ADAPTER (2), CONNECTOR; CONNECTOR BODY, PLUG, RECEPTACLE, ELECTRICAL; CONNECTOR BODY, RECEPTACLE, ELECTRICAL; CONNECTOR, PLUG, ELECTRICAL; CONNECTOR, RECEPTACLE, ELECTRICAL; COVER, ELECTRICAL CONNECTOR; DUMMY CONNECTOR, PLUG; DUMMY CONNECTOR, RECEPTACLE; INSERT, ELECTRICAL CONNECTOR; SHELL, ELECTRICAL CONNECTOR; or a SHIELD, ELECTRICAL CONNECTOR. It may be used for polarization. Its mounting facilities may include threads, press fit, or the like.

SHIELD,SOCKET,PLUG-IN ELECTRONIC COMPONENTS

CONNECTOR BODY,MODULAR PLUG,ELECTRICAL

The main or principal part of a CONNECTOR, MODULAR PLUG, ELECTRICAL which includes insert(s) but does not include removable contact(s) and having one or more cavitites into which an INSERT MODULE, ELECTRICAL CONNECTOR can be installed. It may have a hood or shell, a jackscrew and jacksocket, or other means for polarizing and aligning. It is not designed to be mounted on a bulkhead, chassis, panel or the like. Excludes CONNECTOR BODY, PLUG, ELECTRICAL. For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

CONNECTOR BODY,MODULAR RECEPTACLE,ELECTRICAL

The main or principal part of a CONNECTOR, MODULAR RECEPTACLE, ELECTRICAL which includes insert(s) but does not include removable contact(s) and having one or more cavities into which an INSERT MODULE, ELECTRICAL CONNECTOR can be installed. It may have a hood or shell, a jackscrew and jacksocket, or other means for polarizing and aligning. It is designed to be mounted on a bulkhead, chassis, panel, wall, or the like. Excludes CONNECTOR BODY, RECEPTACLE, ELECTRICAL. For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

CONNECTOR,MODULAR PLUG,ELECTRICAL

An electrical fitting with contacts and having one or more cavities into which an INSERT MODULE, ELECTRICAL CONNECTOR can be installed. The insert modules may/may not be included with the item. The item is constructed to be affixed to the end of a cable, conduit, coaxial line, core, wire, or the like for convenience in joining with another electrical connector(s) or PRINTED WIRING BOARD. It is not designed to be mounted on a bulkhead, chassis, or the like. Excludes JACK, TELEPHONE; JACK, TIP; PLUG, TELEPHONE; PLUG, TIP; INSERT, ELECTRICAL CONNECTOR; INSERT MODULE, ELECTRICAL CONNECTOR; CONNECTOR BODY (as modified); CONNECTOR, PLUG, ELECTRICAL and SOCKET, PLUG-IN ELECTRONIC COMPONENTS. See also LEAD ASSEMBLY, ELECTRICAL; WIRING HARNESS (as modified); and CABLE ASSEMBLY (as modified). For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

CONNECTOR,MODULAR RECEPTACLE,ELECTRICAL

An electrical fitting with contacts and having one or more cavities into which an INSERT MODULE, ELECTRICAL CONNECTOR can be installed. The insert modules may or may not be included with the item. The item is constructed to be affixed to the end of a cable, conduit, coaxial line, cord, wire (includes printed/etched), PRINTED WIRING BOARD, or the like for convenience in joining with another electrical connector(s), or PRINTED WIRING BOARD. It is designed to be mounted on a bulkhead, chassis, panel, wall, PRINTED WIRNIG BOARD, or the like. Excludes LAMPHOLDER; JACK, TELEPHONE; JACK, TIP; INSERT, ELECTRICAL CONNECTOR; INSERT MODULE, ELECTRICAL CONNECTOR; CONNECTOR BODY (as modified); CONNECTOR, RECEPTACLE, ELECTRICAL and SOCKET, PLUG-IN ELECTRONIC COMPONENTS. See also LEAD ASSEMBLY, ELECTRICAL; WIRING HARNESS (as modified); and CABEL ASSEMBLY (as modified). For items without inserts see SHELL, ELECTRICAL CONNECTOR.

INSERT MODULE,ELECTRICAL CONNECTOR

An insulating element with or without contacts which form a portion of an INSERT, ELECTRICAL CONNECTOR but in itself is not a complete functioning insert. It is designed to fit into a CONNECTOR BODY, MODULAR PLUG, ELECTRICAL; CONNECTOR BODY, MODULAR RECEPTACLE, ELECTRICAL; CONNECTOR, MODULAR PLUG, ELECTRICAL; or CONNECTOR, MODULAR RECEPTACLE, ELECTRICAL. Excludes INSULATOR (1), DISK; INSULATOR (1). PLATE; TERMINAL (1), FEEDTRHU; and TERMINAL BOARD. See also connector (as modified); CONNECTOR BODY (as modified); and INSERT, ELECTRICAL CONNECTOR.

COVER,SOCKET PLUG-IN ELECTRONIC COMPONENT

BACKSHELL,DUMMY CONNECTOR

An item specifically designed to fully or partially enclose the termination end of a DUMMY CONNECTOR (as modified). Excludes COVER, ELECTRICAL CONNECTOR and COVER AND GUARD, ELECTRICAL CONNECTOR.

TERMINATION,SHIELD,ELECTRICAL CONNECTOR

An item specifically designed to facilitate the connection of a CABLE, (as modified) to a CONNECTOR, PLUG, ELECTRICAL; CONNECTOR, RECEPTACLE, ELECTRICAL; ADAPTER, CONNECTOR; DUMMY, CONNECTOR, PLUG; DUMMY CONNECTOR, RECEPTACLE; or the like, and provide for a grounded connection between the two items. It excludes SHIELD, ELECTRICAL CONNECTOR and CLAMP, CABLE, ELECTRICAL CONNECTOR.

GUIDE KIT,ELECTRICAL CONNECTOR

Two or more items, which may or may not be a mated pair, designed to prevent the mismatching or misalignment of a connector, electrical. Items may also serve as a connector locking device (i.e., jackscrew). May include the mounting hardware. For single items see POLARIZING KEY, ELECTRICAL CONNECTOR; GUIDE, ELECTRICAL CONNECTOR; JACKSCREW ELECTRICAL CONNECTOR.

ADAPTER,TELEPHONE

An item specifically designed to facilitate the connection of one or more PLUG, TELEPHONE(S) to one or more JACK, TELEPHONE(S) where the items could not normally be connected or one or more PLUG, TELEPHONE(S) to another PLUG TELEPHONE or one or more JACK, TELEPHONE(S) to another JACK, TELEPHONE or any combination of the above. For items designed to adapt a telephone plug or jack to an electrical connector see ADAPTER, CONNECTOR. For connectors designed to connect a handset to a telephone base or a telephone base to a wall outlet see CONNECTOR, (as modified).

NUT,COUPLING,ELECTRICAL CONNECTOR

An item with internal threads and an integral seat, specifically designed to hold together mated electrical connector components.

ADAPTER KIT,CIRCUIT BREAKER

An adapter kit containing conductors for mounting on a breaker, plug-in mounting blocks, rear studs and mounting hardware. Used for rear connected applications such as switchboards. It facilitates ease of installation and front removal of a CIRCUIT BREAKER.

ADAPTER,CABLE BREAKOUT

An item designed to electrically and physically accommodate cable connectors and the terminations to which the cable would normally be connected, and thereby provide facilities for the insertion of test equipment leads, probes, and the like, for test and/or monitoring of power, intelligence, and the like, that may be on the wire complement of the cable. The item may provide facilities for either series, shunt, or interwire tests of the cable under actual operating conditions.

ADAPTER SET,CABLE BREAKOUT

A set consisting of two or more ADAPTER, CABLE BREAKOUT with associated connecting cables that provide facilities for the insertion of test equipment leads, probes, and the like, for test and/or monitoring of power, intelligence, and the like, that may be on the wire complement of the cable. The item may provide facilities for either series, shunt, or interwire tests of the cable while under actual operating conditions.

ADAPTER SET,CONNECTOR

A grouping of items consisting of two or more ADAPTER, CONNECTOR. It may include a container or other facility for shipping and/or storage.

BRACKET,ELECTRICAL CONNECTOR

A bracket designed to be attached to a supporting surface for the specific purpose of positioning and sustaining an electrical connector(s). Excludes BRACKET, ANGLE. See also PLATE, RETAINING, ELECTRICAL CONNECTOR.

COVER,TELEPHONE JACK

COVER AND SHELL,ELECTRICAL CONNECTOR

An item consisting of a COVER, ELECTRICAL CONNECTOR and a SHELL, ELECTRICAL CONNECTOR.

INSERT,ELECTRICAL CONNECTOR

An insulating element with or without contact(s) designed to fit into an ADAPTER (2), CONNECTOR; CONNECTOR BODY, PLUG, ELECTRICAL; CONNECTOR BODY, RECEPTACLE, ELECTRICAL; CONNECTOR, PLUG, ELECTRICAL; or CONNECTOR, RECEPTACLE, ELECTRICAL forming an integral liner or seat. Excludes INSULATOR (1), DISK; INSULATOR (1) PLATE; TERMINAL (1), FEEDTHRU and TERMINAL BOARD. See also CONNECTOR (as modified); CONNECTOR BODY (as modified); and INSERT MODULE, ELECTRICAL CONNECTOR.

JACK BOX ASSEMBLY

Two or more JACK BOX on a common mounting or mounted on each other.

SHELL,ELECTRICAL CONNECTOR

The outside case of one or more connectors into which the dielectric materials and contacts are assembled. Also includes shell for ADAPTER, CONNECTOR. See also SHIELD, ELECTRICAL CONNECTOR and COVER, ELECTRICAL CONNECTOR.

ADAPTER,ELECTRICAL PLUG,QUICK DISCONNECT

An item which attaches to or over a connector plug and provides the necessary mechanical accommodations for the quick connect and disconnect of two electrical connectors. It does not include dielectric materials or contacts. Excludes ADAPTER, CONNECTOR&#59; COUPLING HALF, QUICK DISCONNECT and SHELL, ELECTRICAL CONNECTOR. See also ADAPTER, ELECTRICAL RECEPTACLE, QUICK DISCONNECT.

ADAPTER,ELECTRICAL RECEPTACLE,QUICK DISCONNECT

An item which attaches to or over a connector receptacle and provides the necessary mechanical accommodations for the quick connect and disconnect of two electrical connectors. It does not include dielectric materials or contacts. See also ADAPTER, CONNECTOR&#59; ADAPTER, ELECTRICAL PLUG, QUICK DISCONNECT&#59; COUPLING HALF, QUICK DISCONNECT&#59; and SHELL, ELECTRICAL CONNECTOR.

COVER AND GUARD,ELECTRICAL CONNECTOR

An item consisting of a COVER, ELECTRICAL CONNECTOR, and a GUARD, ELECTRICAL CONNECTOR. They are usually attached to each other by means of a chain, or the like.

SLEEVE,LOCKING,ELECTRICAL CONNECTOR

An item which is designed to be installed within the shell of an electrical connector. It serves as an inner mounting device to align and secure into place the various internal components, such as rings, washers, seals, and the like, which together make up that portion of an electrical connector which is inclosed by the shell.

CONNECTOR BODY,PLUG,ELECTRICAL

The main or principal part of a CONNECTOR, PLUG, ELECTRICAL which includes insert(s) designed to accommodate but does not include removable contacts. It may have a hood or shell, a jackscrew and jacksocket, or other means for polarizing and aligning. It is not designed to be mounted on a bulkhead, chassis, panel, wall, or the like. Excludes CONNECTOR BODY, MODULAR PLUG, ELECTRICAL. For items without insert(s), see SHELL, ELECTRICAL CONNECTOR.

CONNECTOR BODY,RECEPTACLE,ELECTRICAL

The main or principal part of a CONNECTOR, RECEPTACLE, ELECTRICAL which includes insert(s) designed to accommodate but does not include removable contacts. It may have a hood or shell, a jackscrew and jacksocket, or other means for polarizing and aligning. It is designed to be mounted on a bulkhead, chassis, panel, wall, or the like. Excludes CONNECTOR BODY, MODULAR RECEPTACLE, ELECTRICAL. For items without inserts, see SHELL, ELECTRICAL CONNECTOR.

BACKSHELL,ELECTRICAL CONNECTOR

An item specifically designed to be placed around that portion of a CONNECTOR, RECEPTABLE, ELECTRICAL or CONNECTOR, PLUG, ELECTRICAL which contains the facilities for attaching wires or cables.It may be designed to provide the necessary accomodations between an electrical cable clamping device and an electrical connector shell, or it may include the clamping device.It may be used for shielding against electrical interference, mechanical injury, or physical damage due to environmental conditions.

SEAL RING,ELECTRICAL PLUG CONNECTOR

Conical shaped item which it is a portion of a CONNECTOR, PLUG, ELECTRICAL designed to fit into the connector.

CONNECTOR,BULKHEAD,ELECTRICAL

An electrical fitting with electrical contacts designed to be mounted on a bulkhead, chassis, panel, wall, or the like. It allows electrical continuity of CABLE ASSEMBLY ELECTRICAL (with modifier) through bulkhead or the like. It may have insulating elements, a hood or shell, screws and means for polarizing and aligning.

COVER ASSEMBLY,ELECTRICAL CONNECTOR

Two or more COVER(s), ELECTRICAL CONNECTOR fastened together, mounted on each other, or connected by other means such as a strap, cable, chain or the like.

TEST CONNECTOR,ELECTRICAL

An electrical component specifically designed to mate with another connector to perform one or more special functions, such as to act as a shield, to short contacts, or to open or close electrical circuits. Connector may be mounted either on an interconnecting device, attached to a cable, or may be part of a test set.

SPLICE,CONDUCTOR

An item designed to expedite or simplify the connection of two or more electrical conductors without bringing them to a fixed point such as a binding post or terminal. It may have a separate tubular shaped piece of nonmetallic, flexible material designed to be slipped over the crimped first piece to seal the conductor joint through heat sealing.

ADAPTER,BATTERY TERMINAL

An adapter constructed to accommodate electrically and physically a cable lug to a battery terminal whose physical design will not normally warrant their connection.

ADAPTER,RADIO FREQUENCY CABLE

An adapter specifically designed to electrically connect two or more radio frequency cables, such as a CABLE ASSEMBLY, RADIO FREQUENCY or CABLE ASSEMBLY, RADIO FREQUENCY, BRANCHED&#59; or one radio frequency cable and a PRINTED WIRING BOARD. It does not include cable(s) or items that provide mating facilities for joining to an electrical connector(s). For items designed to mate with another electrical connector(s), see ADAPTER (2), CONNECTOR and CONNECTOR (as modified). Excludes ADAPTER, WAVEGUIDE and FERRULE, METALLIC SHIELDED CABLE, GROUNDING.

TERMINAL BOARD

An item consisting of insulating material, which is specifically designed to have fastened thereon, or on which are fastened terminal(s), such as screws, solder lugs, solder studs, solderless connectors, clips, and the like. It is usually used for junctions or terminations of wire or cable assemblies. It does not include items as defined above with parts, such as resistors and capacitors mounted thereon. Do not use if a more specific name exists, such as FUSEHOLDER; HOLDER, RESISTOR; FANNING STRIP; CONTACT ASSEMBLY, ELECTRICAL; JACK ASSEMBLY, TIP; CHAMBER, CABLE TERMINAL; PANEL (2) (as modified); CONNECTOR (as modified). Excludes TERMINAL, STUD; TERMINAL, FEEDTHRU, INSULATED; POST, BINDING, ELECTRICAL; and CHASSIS, ELECTRICAL-ELECTRONIC EQUIPMENT. For items having printed electrical conductor paths, see PRINTED WIRING BOARD.

TERMINAL BOX

An enclosure which includes, mounts and protects one or more terminals and/or terminal boards. It is designed for and may include a cover and such accessories as mounting hardware, brackets, locks, and conduit fittings. For boxes which include combinations of different electrical devices such as terminals and/or terminal boards, fuseholders, switches, jacks, circuit breakers, connectors and the like, see DISTRIBUTION BOX. For boxes which are designed to mount, but which do not include terminals and/or terminal boards, see JUNCTION BOX. Excludes TERMINAL BOARD ASSEMBLY. See also CHAMBER, CABLE TERMINAL; and INTERCONNECTING CABINET.

COVER,TERMINAL BOARD

A cover designed to protect electrical terminals against damage, shorting and/or grounding. May have provisions for the passage of wire or cable. Excludes SHIELD, TERMINAL and SHIELD, TERMINAL BOARD.

COVER,TERMINAL BOX

TERMINAL,LUG

A terminal designed to be affixed, usually at one end, to a post, stud, chassis, or the like for mounting. It has provisions for attachment of wire(s) or similar electrical conductor(s) in order to establish an electrical connection and could require the use of tool(s) for attachment of wire. For post like terminals, see TERMINAL STUD. Excludes CLIP, ELECTRICAL; TERMINAL, QUICK DISCONNECT and TERMINAL FEEDTHRU.

SHIELD,BINDING POST

An item specifically designed to be placed around or mounted on a binding post for the purpose of preventing electrical or mechanical interference. May include mounting facilities and provide means for the passage of wire.

POST,BINDING,ELECTRICAL

A metallic postlike terminal, insulated or uninsulated, which is mounted on a board, chassis, panel, or other similar supporting surface. It is designed for frequent manual connections and disconnections of at least one electrical conductor, such as a wire, alligator clip, or spade lug. It may have additional tip jack features for the acceptance of banana plugs, phone tips, and the like. It may also have provisions for permanently attaching an electrical conductor(s). For items which require all electrical conductors to be permanently attached (soldered, crimped, and the like), see TERMINAL, STUD. See also JACK, TIP.

TERMINAL,STUD

A terminal, generally postlike, having an axial portion of its body designed for projecting through or into a panel, or the like, for mounting. Requires the use of tool(s) for attachment of wire. The conductor connection may be insulated from the mounting. Excludes TERMINAL, FEEDTHRU. See also TERMINAL, QUICK DISCONNECT and TERMINAL SET, QUICK DISCONNECT.

FERRULE,ELECTRICAL CONDUCTOR

An item of one piece construction designed to be permanently fastened to the end of an electrical wire or cable in order to facilitate the insertion of the conductor into devices such as clamps, splices, and terminals. It may also be used to water seal insulated wires. Excludes items designed to mate with a specific connector or jack. See also PLUG, TIP; and JACK TIP. Excludes FERRULE, METALLIC SHIELDED CABLE, GROUNDING. For items with other than cylindrical mating end, see TERMINAL, QUICK DISCONNECT.

TERMINAL BOARD ASSEMBLY

Two or more terminal boards having a common mounting or mounted on each other.

TERMINAL STRIP,GROUNDING

A rigid metallic item of electrically conductive material. It is designed with terminal(s) and/or wire-accommodating holes on one end and facilities for connection to another conductive surface on the other end. For items without terminals or wire-accommodating facilities, see PLATE, ELECTRICAL GROUNDING; CONTACT STRIP, RADIO FREQUENCY GROUNDING; and STRIP, ELECTRICAL GROUNDING.

SHIELD,TERMINAL

A metallic item specifically designed to inclose one or more TERMINAL (1) (as modified) which is not an integral part of the shield. It is designed to be attached to a component at a point where external electrical connections are made, and provides the means for attaching and/or completing the electrostatic shielding of an electrical system. It may have provisions for the passage of wire or cable and may include a cover. Excludes CHAMBER, CABLE TERMINAL; COVER, ELECTRICAL CONNECTOR; COVER, TERMINAL BOARD; SHIELD, ELECTRICAL CONNECTOR; and SHIELD, TERMINAL BOARD.

SHIELD,TERMINAL BOARD

A metallic item specifically designed to inclose one or more TERMINAL BOARD which is not an integral part of the shield. It is designed to be attached to a component at a point where external electrical connections are made, and provides the means for attaching and/or completing the electrostatic shielding of an electrical system. It may have provisions for the passage of wire or cable and may include a cover. Excludes COVER, TERMINAL BOARD and SHIELD, TERMINAL.

CONTACT STRIP,RADIO FREQUENCY GROUNDING

A semirigid metallic item of electrically conductive material designed for the specific purpose of grounding and/or bonding radio frequency equipment. It is normally attached to one item to give spring action to form a ground and/or bond with another item. Excludes TERMINAL STRIP, GROUNDING; CONTACT, ELECTRICAL; and STRIP, ELECTRICAL GROUNDING.

TERMINAL JUNCTION BLOCK,SECTIONAL

An electrical item with multiple socket contacts which may or may not be interconnected by bussing, to form one or more circuits. Item may be of feedback, feedthrough and/or terminating design and may afford a convenient method of interconnection. It may or may not include a sealing grommet. Sectional blocks are normally retained in a track or channel mounting. Excludes CHAMBER, CABLE TERMINAL; CONTACT ASSEMBLY, ELECTRICAL; INSERT, ELECTRICAL CONNECTOR; JUNTION BOX ; TERMINAL BOARD; and TERMINAL BOX.

PARTS KIT,TERMINAL JUNCTION

A group of electrical items not having the same item name, but consisting of one or more insulated terminal junctions and a number of terminal fittings in each unit. The kit may include plug, end seal, and electrical connector(s).

TERMINAL,FEEDTHRU

A terminal designed to be mounted on a chassis or other partition, and having through connected wire mounting facilities. It may or may not be insulated. It is fabricated into a single item whose parts are not separable. For items whose parts are separable, see INSULATOR, FEEDTHRU.

FERRULE,METALLIC SHIELDED CABLE,GROUNDING

An item of one or more piece construction designed to be affixed to the outer, or shielding, conductor of CABLE (as modified) to simplify grounding of the outer conductor and/or to anchor the cable to prevent fraying or slipping. For items used with other than shielded cable, see FERRULE, ELECTRICAL CONDUCTOR.

MARKER STRIP,TERMINAL BOARD

An item, generally of insulating material, designed to identify terminal position on terminal boards. Its thickness is small in comparison to its length and width. They can be printed to show terminal designations by numbers, letters, symbols, or any combination thereof. It may serve as insulation between terminal board and chassis. Excludes MARKER, IDENTIFICATION and PLATE, DESIGNATION.

HOLDER,MARKER STRIP,TERMINAL BOARD

A holder designed to mount a MARKER STRIP, TERMINAL BOARD.

COVER,TERMINAL

A cover specifically designed to enclose one or more TERMINAL (as modified) against damage, shorting and/or grounding. May have provisions for the passage of wire or cable. For covers designed to enclose or protect a terminal board, see COVER, TERMINAL BOARD. Excludes COVER, ELECTRICAL CONNECTOR; COVER, SWITCH TERMINAL; and COVER, TERMINAL BOX.

SPLICE SET,QUICK DISCONNECT

A group of items consisting of mating terminals, or terminals with a joining device, designed to expedite or simplify the connection of two or more electrical wires without bringing them to a fixed point such as a binding post or terminal. It allows for simple, rapid separation of the spliced wires without the use of tools. May include an insulation sleeve. See also SPLICE, CONDUCTOR.

TERMINAL,QUICK DISCONNECT

A terminal which is a component of a TERMINAL SET, QUICK DISCONNECT or a SPLICE SET, QUICK DISCONNECT, and incorporates a means permitting its rapid engagement and disengagement, without the use of tools, to a mating part(s). It is designed either for attachment to a stud, post, chassis, or the like, or for permanent attachment to an electrical wire or cable. For items with cylindrical mating ends, see FERRULE, ELECTRICAL CONDUCTOR.

TERMINAL SET,QUICK DISCONNECT

A group of items which, when combined, conform with the definition of TERMINAL, LUG or TERMINAL, STUD. It also provides the additional feature of allowing the conductor accommodation facility(ies) of the lug or stud to be simply and rapidly separated from the mounted (fixed) position of the lug or stud without the use of tools. See also TERMINAL, LUG and TERMINAL, STUD.

TERMINAL,TAPER PIN,ELECTRICAL

TERMINAL,TAPER RECEPTACLE,ELECTRICAL

A female terminal having a formed tapered internal longitudinal center. It is designed for the entrance of a mating TERMINAL, TAPER PIN, ELECTRICAL. The receptacle is generally used for in-line connection. Excludes JACK, TIP; and TERMINAL STUD.

TERMINAL SET,LUG

A collection of two or more TERMINAL,LUG having different characteristics. It may or may not include a CRIMPING TOOL,TERMINAL,HAND.

CONTACT SET,CIRCUIT BREAKER

A grouping of two or more separate circuit breaker contacts. Excludes CONTACT ASSEMBLY, ELECTRICAL.

CIRCUIT BREAKER

A device with means other than fuses for automatically opening the circuit in which it is installed when the current varies from the predetermined value for which the device is set. May include provisions for manual operation. At least one set of contacts must be in series with the actuating element(s). A combination of semiconductor and passive devices may be used in lieu of contacts. For automatically operated items in which the actuating (tripping) element and contacts are not in series, see RELAY (as modified). For items which are operated both manually and automatically but the actuating elements and contact are not in series, see RELAY-SWITCH. Excludes CIRCUIT BREAKER BOX and magneto "breaker" assemblies. See also SWITCH (as modified); and CONTROLLER.

CIRCUIT BREAKER SUBASSEMBLY

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a circuit breaker, but which in itself is not a complete functioning item and cannot be assigned a more definite item name. Excludes COIL, ELECTRICAL; THERMAL RELEASE, CIRCUIT BREAKER; and TRIPPER, CIRCUIT BREAKER.

COVER,CIRCUIT BREAKER

ARMATURE,CIRCUIT BREAKER

An item which is the pivoted or spring-mounted ferromagnetic portion of a circuit breaker, and which moves to break and/or make an electrical circuit in response to electromagnetic changes.

THERMAL RELEASE,CIRCUIT BREAKER

An item containing fusible material which melts when the temperature reaches a predetermined value caused by an overload in an electrical circuit. The melting (fusion) of the material mechanically causes contacts to open and/or close. The item may include an integral heating element, such as a coil or resistor, but does not include contacts. Excludes COIL, CIRCUIT BREAKER; HEATER, THERMAL RELEASE; and TRIPPER, CIRCUIT BREAKER.

BASE,CIRCUIT BREAKER

TRIPPER,CIRCUIT BREAKER

An electromechanical device which releases the holding mechanism and permits the contacts of a circuit breaker to open. It is a replacement part of a circuit breaker. Does not include relays. See also THERMAL RELEASE, CIRCUIT BREAKER.

CIRCUIT BREAKER BOX

An enclosure which includes, mounts, and protects one or more circuit breakers. It is designed for and may include a cover and such accessories as mounting hardware, brackets, and conduit fittings. May include terminal boards and/or bus conductors used as a convenience for terminating the circuit breakers. May include handle tie bars. It is usually used as a load center for the protection of certain electrical devices such as water heaters, motors, etc., or as a service center for homes or offices. For boxes which include only switches, jacks, fuseholders, terminals and/or terminal boards or fuseholders, or any combination of these devices, see SWITCH BOX; JACK BOX; TERMINAL BOX; and DISTRIBUTION BOX. For boxes designed to mount and protect but do not include circuit breakers, see CIRCUIT BREAKER BOX SUBASSEMBLY. See also INTERCONNECTING CABINET; PANEL, POWER DISTRIBUTION; JUNCTION BOX; and CABINET, ELECTRICAL EQUIPMENT.

INTERRUPTER,GROUND FAULT

An electrical safety device designed for insertion in a power distribution circuit to provide protection against serious injury or death caused by contact with damaged or defective electrical equipment. It disconnects the ungrounded conductor(s) when its integral circuitry senses an undesirable current flow to earth (ground). It includes a reset feature and may have a test facility. It may be designed for installation in an electrical panel or box, or may be a portable unit with its own enclosure. May include switches, circuit breakers, fuses, and the like; portable units may have connecting cables. Excludes overcurrent protective devices which also provide a ground fault sensing and interrupting capability. See also CIRCUIT BREAKER.

CIRCUIT BREAKER BOX SUBASSEMBLY

An enclosure which is designed to mount and protect one or more circuit breakers. It does not include the circuit breakers. It is designed for and may include a cover and accessories as mounting hardware, brackets, and conduit fittings. May include terminal boards and/or bus conductors used as a convenience for terminating the circuit breakers. For items which include circuit breakers, see CIRCUIT BREAKER BOX. For boxes not designed to mount and protect circuit breakers, see JUNCTION BOX.

SHIELD,CIRCUIT BREAKER

An item specifically designed to be placed around or over one or more CIRCUIT BREAKER in order to prevent or reduce electrical and/or mechanical interference.

LOCKING DEVICE,CIRCUIT BREAKER

An item of various shapes, having an integral locking device or facilities to accommodate an external locking device, which is designed to prevent unauthorized actuation of a CIRCUIT BREAKER. Excludes items designed to protect the actuator from damage or inadvertant throwing, see GUARD, SWITCH.

DETENT,CIRCUIT BREAKER

An item designed to prevent the unintentional manual activation of a CIRCUIT BREAKER (as modified) by mechanically locking the release mechanism. Excludes COVER, CIRCUIT BREAKER.

TRIP DEVICE,CIRCUIT BREAKER

A device used to trip the circuit breakers requiring an ac voltage by using the stored energy in a capacitor.

REMOTE CONTROL,CIRCUIT BREAKER

A device designed to remotely control a CIRCUIT BREAKER (as modified). It is generally mounted on a rail and installed on an electric panel or in a control box. It may include electrical cabling and external connections. The device may be controlled locally.

DUMMY CIRCUIT BREAKER

An item designed to occupy the space of a CIRCUIT BREAKER, without having its electrical characteristics.

SWITCH,KNIFE

A switch using hinged blades for contacts which enter or embrace fixed contact clips. Includes switches which have a movable blade which swivels to permit contact with each of several fixed contact clips. See also SWITCH, BOX.

SWITCH,HOOK

A switch in which the integral external actuator is hook shaped or lipped so that the hanging of an object on the actuator will operate the switch. Excludes sensitive switch with adapters.

SWITCH,MERCURY

A switch in which a mercury pool is used to bridge fixed contacts when their inclosing sealed capsule is tilted. Do not use if switch has an actuator, such as lever, push button, toggle, and the like. See SWITCH (as modified). For items in which a contact may be moved into a mercury pool by a magnetic field, see SWITCH, REED.

SWITCH,CENTRIFUGAL

A switch which is actuated by centrifugal force.

SWITCH,FOOT

A switch with a pedal which is actuated by the foot. For items not provided with a pedal, see switch (as modified). Excludes SWITCH, BEAM SELECTING, HEADLIGHT.

SWITCH,LEVER

A switch which is externally actuated by a lever and whose contacts open and close at a speed proportional to the speed at which the lever is operated. Includes pile-up lever switches and wafer lever switches. Excludes SWITCH, TOGGLE; SWITCH, ROTARY; SWITCH, KNIFE; SWITCH, SENSITIVE; SWITCH, BOX; and SWITCH, MERCURY.

SWITCH,TOGGLE

A switch which is externally actuated by a lever and whose contacts open and close with an instantaneous (snap) action; includes items having one or more momentary positions. Includes switches (snap action) which use mercury to bridge contacts, and assemblages of complete switches (snap action) having common actuators. Excludes SWITCH, LEVER; SWITCH, ROTARY; SWITCH, KNIFE; SWITCH, SENSITIVE; and SWITCH, BOX.

SWITCH,PRESSURE

A switch which is actuated by changes in pressure of any gas or liquid or by changes in a vacuum acting upon its sensing element. Excludes BAROSWITCH; SWITCH, PRESSURE-THERMOSTATIC; and SWITCH, SENSITIVE.

SWITCH,SENSITIVE

A switch with a quick-acting mechanism actuated by a highly delicate tactile contact. Includes membrane switch. Excludes SWITCH, FLEXIBLE; SWITCH, PRESSURE; and SWITCH, THERMOSTATIC.

SWITCH,SLIDE

A switch designed to be actuated by the sliding of a button, bar, or knob.

SWITCH,LOCK

A switch which is externally actuated by a key designed to be inserted into a switch, or actuated by a predetermined combination dial setting(s). Excludes SWITCH, LOCK, IGNITION.

SWITCH,INTERLOCK

An item which completes or interrupts the connections in one or more electrical circuits. Its electrical elements consist of separate parts designed to be mounted respectively on a frame and a door, drawer, or cover, It acts as a safety device to open a circuit when the door or drawer is opened or the cover removed. It does not include devices of which a complete switch with an actuator is one of the parts; for such devices, use SWITCH (as modified). Excludes SWITCH, MERCURY; and SWITCH, REED.

SWITCH,PULL

A switch which is actuated by a device, such as a pull rod or a chain which requires pulling for each action. Excludes LIGHT-SWITCH ASSEMBLY and SWITCH, SENSITIVE.

SWITCH,PUSH

A switch that is externally actuated by a device such as a push rod or button, which requires pushing for each actuation. The action may be momentary, with mechanical return. The actuating device may or may not be an integral part of the switch. The item may include provisions for mounting indicating lamp(s) or light emitting diode(s) in the actuator. Includes items consisting of individually separable switches that are physically interlocked, that have a common actuator, or are electrically connected. Excludes LIGHT-SWITCH; LIGHT-SWITCH ASSEMBLY; SWITCH, BEAM SELECTING, HEADLIGHT; SWITCH, FOOT; SWITCH, INTERLOCK; SWITCH, PRESSURE; SWITCH, PUSH-PULL; SWITCH, SENSITIVE and SWITCH ASSEMBLY. For devices which start, stop, reverse, select and/or regulate the speed of a motor, see STARTER, MOTOR and CONTROLLER, MOTOR.

SWITCH,PUSH-PULL

A switch which is actuated in one direction by pushing and in the opposite direction by pulling. Excludes LIGHT-SWITCH ASSEMBLY.

SWITCH,TRIGGER

A switch which is actuated by pulling a trigger. The switching device with trigger action may be a separate unit but is usually mounted or designed to be mounted in a pistol-grip handle. It may include provisions for locking the switch in the "ON" position. Excludes GRIP ASSEMBLY, CONTROLLER, AIRCRAFT.

SWITCH,THERMOSTATIC

A switch that is actuated by changes in ambient temperature. Excludes CIRCUIT BREAKER; CONTROL, TEMPERATURE (as modified); FUSE (as modified); PROTECTOR, THERMAL-OVERLOAD, ELECTRICAL MOTOR; RELAY, THERMAL; and THERMOSTAT, FLOW CONTROL. See also CONTROL, TEMPERATURE (as modified) and REGULATOR, TEMPERATURE (as modified).

SWITCH DRIVE SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of a switch drive but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

SWITCH SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together forms a portion of a switch but which in itself is not a complete functioning item and cannot be assigned a more definite item name. See also SWITCH SECTION, ROTARY and CONTACT ASSEMBLY, ELECTRICAL.

COVER,ELECTRICAL SWITCH

Excludes BOOT, DUST AND MOISTURE SEAL; COVER, SWITCH TERMINAL; GUARD, SWITCH; and PLATE, WALL, ELECTRICAL.

SWITCH ASSEMBLY

Two or more complete switches mounted on each other or having a common mounting the major function of which is to hold the switches. Each switch, as a separable item, must be capable of functioning in accordance with its own name. Excludes items consisting of individually separable switches which are physically interlocked (e.g., one button returns when the other is pushed), which have a common actuator, or are electrically connected. See also SWITCH, PUSH.

ROTOR,ELECTRICAL SWITCH

An item designed as the rotating part of an electrical switch.

STOP,ELECTRICAL SWITCH

An item designed to restrict the movement of an electrical switch actuator, Excludes DETENT, SWITCH; and LATCH, SWITCH.

CONTROL,INTERLOCK

A device that determines the mode of operation of an interlock system.

SWITCH,INERTIA

A switch which is specifically designed to be actuated by an abrupt change in velocity of the item upon which it is mounted.

LATCH,SWITCH

An item which is an auxiliary part of a switch and designed to hold the switch in a position into which it has manually or mechanically been thrown. See also DETENT, SWITCH; and STOP, ELECTRICAL SWITCH.

DETENT,SWITCH

A mechanism which is a part of or may be added to a switch to establish predeternimed switching positions. See also STOP, ELECTRICAL SWITCH and LATCH, SWITCH.

SWITCH,ROTARY

A switch actuated by a definite angular rotation of the switch shaft about its axis. For items having rated actuation travel and pressure characteristics, see SWITCH, SENSITIVE. Excludes RELAY, ROTARY; SWITCH, STEPPING; and SWITCH, TELEPHONE (as modified).

BAR,ACTUATOR,ELECTRICAL SWITCH

An item which is long in proportion to its other dimensions and is used as an electrical switch actuator.

GUARD,SWITCH

A framework fabricated of rigid material designed to protect a switch against external damage and/or prevent inadvertent throwing of the switch. Excludes switch locking devices.

ROLLER,ELECTRICAL SWITCH

A machined pin, rod or cylinder which is used in the mechanism of an electrical switch to reduce friction and wear.

YOKE,ELECTRICAL SWITCH

An item designed to join together two electrical switches or parts of a switch so as to cause the joined items to function as a unit.

SWITCH,BOX

A switch designed with its actuator extending from the box which incloses the circuit elements. The door or cover of the box is designed so that it may be readily opened or removed, thus providing relatively easy access to the circuit elements. The item is commonly designated as a safety switch or entrance switch. May be fusible and may have interlocking device.

SWITCH,TILT

A switch which is actuated upon angular displacement from a predetermined plane. Does not include SWITCH, SENSITIVE and SWITCH, MERCURY.

ADAPTER,SWITCH ACTUATOR

An adapter designed to be mounted on a switch so that the switch may be opened or closed by an action of force not adapted to directly actuate the integral switching mechanism. Does not include knobs. See also EXTENSION, SHAFT.

CONTROL,ROTARY SWITCH

An item which determines the mode of operation of an integral rotary switch. It is controlled manually or by a CONTROL, REMOTE SWITCHING.

SWITCH,PRESSURE-THERMOSTATIC

A switch which is actuated by changes of pressure (vacuum) on any gas or liquid and by changes in ambient temperature. The contacts for the temperature and pressure sensitive elements may be common.

SWITCH SECTION,ROTARY

An item consisting of electrical contacts mounted on an insulated plate which together form a section of a switch or relay. It includes both rotor and stator but does not include drive or actuating mechanism.

HANDLE,SWITCH

The detachable portion of an actuator. It is usually attached at an angle to the pivoted axis of the actuator. May include a radial lever as an integral or detachable part. Excludes KNOB; and HANDWHEEL.

HOUSING,SENSITIVE SWITCH

An item designed to inclose a basic sensitive switch providing characteristics features such as dust-proof, explosion-proof, watertight, and the like, and having provisions for actuating the switch. Excludes BOX, SWITCH.

SWITCH BOX

An enclosure which includes, mounts, and protects one or more electrical switches. It is designed to have a cover which completely encloses the switch(es) and its (their) actuator(s). The cover may or may not be included. May also include mounting hardware, lock(s), conduit fittings, and terminal board(s) used specifically for terminating the switch(es). For boxes containing combinations of different electrical devices, such as switches, jacks, fuseholders, connectors, circuit breakers, terminal boards, and the like, see DISTRIBUTION BOX. For boxes designed to mount but which do not include switches, see JUNCTION BOX. Excludes CONTROL (2) (as modified); PANEL, POWER DISTRIBUTION; SWITCH, BOX; and SWITCH ASSEMBLY.

WATER SWITCH

An item consisting of two electrodes which pass current when immersed in salt water. It may have an electrical connection cable.

BOOT,DUST AND MOISTURE SEAL

A flexible, nonmetallic item designed to prevent entry of dust, moisture and other contaminants into critical areas around shafts, levers, electrical wires and hoses. Sealing may be either static or dynamic. The item may include mounting hardware (support plates, clamps and the like). Excludes BELLOWS, PROTECTION; GROMMET, NONMETALLIC; and CABLE NIPPLE, ELECTRICAL. See also CAP, ELECTRICAL; CAP, PROTECTIVE, DUST AND MOISTURE SEAL; and SHIELD, ELECTRICAL CONNECTOR.

COVER,SWITCH ACTUATOR,NONLUMINOUS

A clip designed to fit on the end of a "bat" or "ball" type actuator of a switch or switch type circuit breaker. Its function is to cover luminous ends to prevent radiation, and/or to mark or identify when certain switches or circuits should not be used. For similar items having fluorescent or radioactive type inserts, use MARKER, SELF-LUMINOUS.

DIAPHRAGM,PRESSURE SWITCH

A maintenance item for a SWITCH, PRESSURE. It converts pressure into motion for opening or closing the switch contacts.

SWITCH,STEPPING

An electromagnetically actuated switch having contact wipers which are successively rotated over fixed bank contacts. The contact wipers are progressively advanced over the fixed bank contacts through a repetitive series of stepping operations. The stepping operation may be a continuous forward rotation acting through 360 degrees to return to its normal unoperated position or it may be designed to include an electromagnetic and/or mechanical means for releasing and resetting the switch to its released position for a subsequent operation. The contact wipers may be mechanically held in contact with the fixed bank contacts after the armature of the actuating coil has released. The switch may be released at the end of its travel or at any intermediate position. It includes items designed with two electromagnetic actuators that enable the switch to operate in either direction. For items having the dual function of a switch and a relay assembled together on a common mounting, see RELAY-SWITCH. For other than electromagnetically actuated switches whose contact wipers are manually rotated over fixed bank contacts, see SWITCH, ROTARY. Excludes RELAY, ROTARY and SWITCH, TELEPHONE (as modified).

SWITCH,REED

An item actuated by an external magnetic field and having two or more contacts inclosed in a sealed capsule. Do not use if switch has an actuator, such as a lever, push button, toggle, and the like. See SWITCH (as modified). For items provided with an operating coil, use RELAY (as modified). It includes items in which a contact may be moved into a mercury pool by a magnetic field.

SWITCH,PROXIMITY

A switch designed to perform the function of opening and/or closing one or more electrical circuits. The switching function is accomplished by means of separable contacts, semiconductor devices, or a combination of separable contacts and semiconductor devices. The item functions in response to electrical changes in its internal circuit caused by capacitance, inductance, or magnetic flux changes. It is activated by permanent magnets, metallic materials, or nonmetallic materials which come within its sensing range. For sensing switches which respond to changes other than capacitance, inductance, or magnetic flux, see SWITCH, AIRFLOW; SWITCH, CENTRIFUGAL; SWITCH, INERTIA; SWITCH, PRESSURE; SWITCH, PRESSURE-THERMOSTATIC; SWITCH, THERMOSTATIC; and SWITCH, TILT.

SWITCH,FLEXIBLE

A switch that is externally actuated by the application of pressure at any point along its operating surface which encloses parallel electrical conductors. It may have one or more sets of parallel conductors. Excludes SWITCH, PUSH and SWITCH, SENSITIVE.

SWITCH,FLOW

A switch which is specifically designed to operate by the influence of a gaseous, liquid, or solid media velocity on its actuator.

SWITCH,LIQUID LEVEL

A switch which is actuated by a float or sensing device(s) to control liquid level and/or actuate visual or audible warning systems. It may include a relay controlled by the switch element. Excludes TRANSMITTER,LIQUID QUANTITY.

RETAINER,ELECTRICAL SWITCH

An item designed to position and/or restrain the movement of one or more switches in their normal operating positions.

SWITCH,SOLID STATE

A switch designed to perform the function of opening and/or closing of one or more electrical circuits. In lieu of separable contacts, the switching function is accomplished by means of an arrangement of semiconductors and passive circuit devices. The item functions in response to electrical changes in its own internal circuit caused by the approach of permanent magnets, metals, capacitance or inductance. The form of the item and kind of actuation (push, toggle and rotary action) may be identical to that of switches having separable contacts.

SHIELD,SWITCH

An item specifically designed to be placed around or over one or more SWITCH (as modified) in order to prevent or reduce electrical and/or mechanical interference.

SWITCH,ELECTRONIC

An electronic device which provides for the transfer of the electrical signal input from one component to another, or between two or more components. It may also provide a continuous sequence of switching or sampling of a number of circuits. See also GATE, ELECTRONIC.

SWITCH,PROGRAMMING

An item with a motor-driven program switch which, contrary to pulse-actuated stepping mechanisms, is permanently driven. Program mechanisms are required in applications where the program flow must be free from control pulses. For pulse-driven switching mechanisms designed for stepping operations see SWITCH, STEPPING.

PUSH BUTTON SET

A group of two or more push buttons (the detachable portion of a switch, circuit breaker, controller or the like). They may be any shape or design and may include detachable tops, marked with letter(s), numeral(s), or other characters. Excludes KNOB, HANDLE, AND KEYTOP, KEYBOARD.

DUMMY SWITCH

An item occupying the space of an electrical switch, without having its functions.

ARM,SWITCH ACTUATOR

An arm designed to be mounted on a switch mechanism shaft.

KEY,SWITCH

A device intended for insertion into the actuator of a switch to lock the switch in either an on or off position.

PUSH BUTTON

An item which constitutes the detachable portion of a switch, circuit breaker, controller, motor starter actuator or items equipped with a key type station selector device etc, upon which the pushing pressure is applied to operate the item. It may be of any shape or design and may include a detachable top, marked with letter(s), numeral(s), or other characters, and/or a plunger or rod as an integral or detachable part. Excludes KNOB; HANDLE, SWITCH; BAR ACTUATOR, ELECTRICAL SWITCH and KEYTOP, KEYBOARD.

SWITCH,CODE INDICATING WHEEL

A switch which is externally actuated by a thumbwheel and/or pushbutton. A legend or message is visually displayed at each position of the indicating wheel which corresponds to electrically coded output. Electrically coded output is achieved by rotating a set of brush contacts permanently attached to the code indicating wheel, against a stationary commutator which is usually a printed wiring board having electrical pads or contacts which are interconnected by the rotating brush contacts. May have additional electrical components (such as resistors, capacitors, diodes) premounted on that portion of printed wiring board which extends beyond the back of switch housing.

MICROCIRCUIT,LINEAR

A microcircuit whose output is a function of the input; that is, the output varies in a predetermined and essentially predictable manner from the input signal.

MICROCIRCUIT,DIGITAL

A microcircuit specifically designed to generate, modify, or process electrical signals which operate with two distinct or binary states. These states are commonly referred to as on and off, true and false, high and low, or "1" and "0".

MICROCIRCUIT ASSEMBLY

A grouping of two or more individual microcircuits mounted on a common mounting or on each other. Each microcircuit must be separable and capable of functioning in accordance with its given name. The item is generally part of an electrical/electronic subassembly and cannot be assigned a more specific item name. It excludes items containing electrical/electronic components other than microcircuits, except that when mounted on a printed wiring board it may include a connector(s). For items containing other components in additition to MICROCIRCUITS see CIRCUIT CARD ASSEMBLY and ELECTRONIC COMPONENTS ASSEMBLY. F0r items having a complete individual electrical/electronic function, use the applicable item name such as AMPLIFIER (as modified), OSCILLATOR (as modified) or POWER SUPPLY.

MICROCIRCUIT SET

A grouping of two or more separate MICROCIRCUITS, (as modified) which may or may not be matched together for characteristic(s). For items having a common mounting or mounted on each other, see MICROCIRCUIT ASSEMBLY. Excludes SEMICONDUCTOR DEVICE SET.

MICROCIRCUIT,DIGITAL-LINEAR

A microcircuit having the dual functions of a MICROCIRCUIT (1), DIGITAL and a MICROCIRCUIT (1), LINEAR.

MICROCIRCUIT,HYBRID

A circuit in which one type of microcircuit is combined with some other type of microcircuit or with discrete components. For two microcircuits on a common mounting or on each other, see MICROCIRCUIT ASSEMBLY. For microcircuits having a complete independent memory function, see MICROCIRCUIT (1), MEMORY.

MICROCIRCUIT,MEMORY

A circuit designed to store information and/or coded instructions. Item has pins or other connections to install in a computer or computing device. Does not include magnetic drums, tapes, punched cards or the like. For items that have portable type connections see MEMORY, PORTABLE, SOLID STATE.

REGULATOR,VOLTAGE

A component within a single inclosure or provided with a single mounting specifically designed to control automatically the voltage output of an electrical system within certain required limits, regardless of variations of the effective load or of input voltages within a specific range. Does not include items in which regulation is accomplished solely by transformer action. See also REGULATOR SET, VOLTAGE. Excludes REGULATOR, ENGINE GENERATOR.

CONVERTER,FREQUENCY,ELECTRONIC

An electronic device having frequency mixing circuits and an integral oscillator which mixes the incoming frequency(ies) with the oscillator frequency, the resultant frequency(ies) being a combination of the two sources. Includes equipment that performs these functions at either radio or power line frequencies. Excludes items that change frequency by means of rotating equipment or rectifier and switching or keying circuitry.

CONVERTER,FREQUENCY,STATIC

An item utilizing electron tubes, transistors, and/or semiconductor devices forming rectifier and electronic keying or switching circuitry, that is inserted between a load designed to operate at one frequency and a power supply line rated at another frequency. For items performing the same function by heterodyne action at either radio or power line frequencies, see CONVERTER, FREQUENCY, ELECTRONIC. For items that perform this function by means of rotary equipment, see MOTOR-GENERATOR. See also DIVIDER-MULTIPLIER, FREQUENCY; FREQUENCY DIVIDER; FREQUENCY MULTIPLIER and MIXER STAGE, FREQUENCY.

FREQUENCY DIVIDER

An electronic device for delivering an output wave whose frequency is a proper fraction (sub-multiple) of the input frequency. It may also provide incidental signal amplification.

OSCILLATOR,PULSE DELAY

An electronic device which generates alternating current power at a frequency(ies) determined by the values of certain constants in its circuits. It is characterized by a network in the input and/or output circuits which causes a delay in transmission of a trigger pulse of predetermined width for a definite time interval. See also DELAY LINE.

KEYER

An item which by electrical, electronic, and/or mechanical means automatically opens and closes a control circuit or circuits of another item in a predetermined manner. Excludes KEYER, FREQUENCY SHIFT; and MODULATOR, RADIO TRANSMITTER.

DEMULTIPLEXER SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of a demultiplexer, but which in themselves are not a complete functioning item and cannot be assigned a more definite item name.

REGULATOR,CURRENT

A regulator that automatically controls the current output of an electric system within a specific range regardless of the variation of the effective load or input current values. Does not include items in which regulation is accomplished solely by transformer action. See also TRANSFORMER, POWER (as modified). Excludes REGULATOR, ENGINE GENERATOR.

DETECTOR,RADIO FREQUENCY

An electronic device which demodulates radio frequency energy and may also provide a direct current control potential.

DETECTOR,VIDEO SIGNAL

An electronic device which demodulates video signals. It is used with equipment in which electrical impulses are converted into visual presentations on the screen of a cathode ray tube.

DEMULTIPLEXER

An item designed to decombine two or more simultaneous intelligence signals for recovering the intelligence received from a single signal transmission facility, the intelligence having been previously combined by a compatible multiplexer. See also MULTIPLEXER.

OSCILLATOR SUBASSEMBLY

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of an oscillator but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

KEYER,FREQUENCY SHIFT

An electronic device which, in accordance with an intelligence signal, varies the frequency of a radio transmitter to which it is connected. It is generally used in the transmission of telegraph signals wherein the "MARK" signal is transmitted at a given frequency and the "SPACE" signal at a frequency displaced from the "MARK" frequency by a fixed number of hertz (usually 800).

CODER,RADIO BEACON

An electronic device which supplies keying pulses for radio frequency energy beacon equipment in accordance with a predetermined combination of signals. See also KEYER and MODULATOR (as modified). Excludes CODER, AUDIO FREQUENCY.

CHOPPER,ELECTRONIC

An electromechanical or electronic (includes solid state semiconductor items) device designed to convert an electrical signal into a modified square wave output signal. For items excited by an alternating current, the output signal is the same frequency as, and bears a definite phase relationship to, the excitation voltage. For those electronic items designed to operate on direct current only, the output frequency of the item is dependent upon the inherent properties of the item, or the internal or external circuit constants, or the applied driving coil voltage impressed on the input signal. For an electromechanical item whose coil is designed for direct current only, see VIBRATOR, INTERRUPTER and VIBRATOR, SELF-RECTIFYING.

OSCILLATOR,CRYSTAL CONTROLLED

An oscillator whose operating frequency(ies) is controlled by a CRYSTAL UNIT, QUARTZ. For an oscillator controlled by a device other than a crystal, see OSCILLATOR (1), NONCRYSTAL CONTROLLED. See also GENERATOR, SIGNAL; and CALIBRATOR, FREQUENCY. Excludes FREQUENCY SUPPLY, TELEPHONE CARRIER; RESONATOR, TUNING FORK; and OSCILLATOR, PULSE DELAY.

OSCILLATOR,NONCRYSTAL CONTROLLED

An oscillator whose operating frequency(ies) is controlled by an electronic device other than a CRYSTAL UNIT, QUARTZ. For an oscillator controlled by a crystal, see OSCILLATOR (1), CRYSTAL CONTROLLED. See also GENERATOR, SIGNAL; and CALIBRATOR, FREQUENCY. Excludes FREQUENCY SUPPLY, TELEPHONE CARRIER; RESONATOR, TUNING FORK; and OSCILLATOR, PULSE DELAY.

ELECTRONIC MODULE,STANDARDIZED

An electronic device capable of controlling voltage and/or current to produce gain, oscillation or similar integral functions. It consists of a collection of electronic parts such as capacitors, resistors, coils, relays, transistors, semiconductor devices, and microcircuits in a single replaceable package. The configuration, physical dimensions, and electrical parameters of the item have been standardized in accordance with Government and/or Industry specifications and/or standards. Excludes items with nonstandardized configuration. It is not subject to disassembly as distinguished from such items as CIRCUIT CARD ASSEMBLY and ELECTRONIC COMPONENTS ASSEMBLY. Do not use if a more specific item name exists such as AMPLIFIER (as modified), CODER (as modified), MICROCIRCUIT (as modified), and OSCILLATOR (as modified).

CONTROL SET,ACTUATION

A control system electronics unit (CSEU) which provides electrical interface for certain power arm and monitor functions, and electronics battery which supplies electrical power. It controls two batteries which supply power to four electromechanical actuators, integrated guidance unit (IGU) which send fin position commands from the integrated guidance unit to the control system electronics unit.

FREQUENCY DIVIDER MODULE

An electronic device for delivering an output wave whose frequency is a proper fraction (sub-multiple) of the input frequency. It may also provide incidental signal amplification. The configuration, physical dimensions, and electrical parameters of the item have been standardized in accordance with government and/or industry specifications and/or standards.

DETECTOR,PROXIMITY,INDUCTIVE

A device which uses an oscillator generated alternating magnetic field to detect the presence and/or position of foreign objects within a limited field of view. The item's field of view is very small when compared to security type motion detectors. See also; TRANSDUCER, MOTIONAL PICKUP (6695); and MOTION DETECTOR (6350).

CONVERTER SUBASSEMBLY,FREQUENCY,STATIC

Two or more different types of items having a common mounting or mounted on each other, which together form a portion of a CONVERTER,FREQUENCY,STATIC but which in itself is not a complete functioning item. Not to be used if a more specific item name exists.

DETECTOR,PROXIMITY,ULTRASONIC

A device designed to transmit an ultrasonic wave and to receive its echo to detect the presence and/or the position of foreign objects in a limited field of vision. The item's field of view is very small compared to security type motion detectors. See also: TRANSDUCER,MOTIONAL PICKUP and MOTION DETECTOR. Excludes: DETECTOR,PROXIMITY,INDUCTIVE.

HEADSET,ACOUSTICAL

A nonelectrical item consisting of sound conducting tubing and receivers which are attached to the end(s) of the tubing. The receivers are shaped to fit the ear of the wearer. It is designed to carry sound, produced by another item, to the ear. May include diaphragm, resonant chambers, yoke and/or headband. Excludes STETHOSCOPE.

EARPHONE ELEMENT

The internal fabrication of an earphone. It may include a diaphragm but does not include shell, earpiece, or a connecting cord.

HORN,LOUDSPEAKER

An acoustic transformer with varying cross-sectional area designed to effectively radiate acoustic energy for reception at a distance. Includes multicellular types. Does not include a diaphragm or driver.

EARPHONE

An item which converts electrical current variations into sound waves and which is designed to be placed against the ear or against the opening of the auditory canal. For one or two earphones mounted on a headband, see HEADSET, ELECTRICAL.

FILTER,ACOUSTICAL

An item specifically designed to absorb certain audio frequencies.

LOUDSPEAKER-MICROPHONE

An item consisting of a loudspeaker and a microphone housed in a common case. It may or may not include electronic circuitry to control its operation. Transmit-receive switching may be controlled by automatic, manual or remote operation. For a loudspeaker used as a microphone, see LOUDSPEAKER, (as modified).

CONE,LOUDSPEAKER

A conical-shaped diaphragm of a loudspeaker. It may include a voice coil. See also DIAPHRAGM, LOUDSPEAKER DRIVER.

LOUDSPEAKER ASSEMBLY

Two or more loudspeakers on a common mounting or mounted on each other. It does not include one loudspeaker with accessories such as transformer, case or resistors. For coaxial loudspeakers which are not readily separable, see LOUDSPEAKER (as modified).

MICROPHONE ELEMENT

A complete fabrication of the essential internal operating parts of a microphone.

MICROPHONE,CAPACITOR

A microphone which depends for its operation upon variation of its electrostatic capacitance.

MICROPHONE,CARBON

A microphone which depends for its operation upon the variation in resistance of carbon granules.

MICROPHONE,CERAMIC

A microphone which depends upon the generation of an electrical charge by the deformation of a ceramic element for its operation.

MICROPHONE,CRYSTAL

A microphone which depends for its operation upon the generation of an electrical charge by the deformation of a crystal having piezoelectric properties.

MICROPHONE,DYNAMIC

A microphone which depends for its operation upon the generation of an electromotive force by the motion of a moving coil within a magnetic field.

MICROPHONE,MAGNETIC

A microphone which depends for its operation upon variations in reluctance of a magnetic circuit.

MICROPHONE,RIBBON

A microphone which depends for its operation upon variations in the electromotive force generated in a metallic ribbon within a magnetic field or the change in resistance of a suspended hot wire due to the change in temperature caused by the cooling effect of the particle velocity of a sound wave.

COVER,LOUDSPEAKER

COVER,MICROPHONE

MOUTHPIECE,MICROPHONE

An item attached to a microphone for the purpose of directing sound waves into the microphone element. It is usually tubular or cupped shaped. For items which are essentially flat and which have no specific directional properties, see CAP, ELECTRICAL.

SHIELD,MICROPHONE

An item designed to be added to a MICROPHONE (1) (as modified) to protect the microphone diaphragm from condensed moisture originating from the operator's breath when in use, and/or to protect the microphone elements from dust or other foreign particles.

HEADSET-CHEST SET,ELECTRICAL

A device consisting of one or two earphones with necessary supporting means, a chest harness and a chest mounted microphone. Includes connecting cords. May include junction box, switches, and/or connectors. See also HEADSET-MICROPHONE.

LOUDSPEAKER,ELECTROMAGNETIC

A loudspeaker whose diaphragm movements are produced by a coil or iron armature moving in the field of an electromagnet or a fixed coil.

HEADSET,ELECTRICAL

An item consisting of one or two earphones with a connecting cord and with or without a headband. Single headphone type must include facilities as required for use. For items without earphones designed to protect the ears from noise, see PROTECTOR, HEARING.

HANDSET

A hand-held device in which are inclosed a telephone type earphone and a telephone type microphone. May include cords, connectors and switches. See also HANDLE, HANDSET.

ARMATURE,MICROPHONE

An item of ferromagnetic material that is pivot mounted and which is vibrated by a diaphragm.

HANGER,MICROPHONE

An item primarily designed to suspend and support a microphone when not in use.

HOLDER,HANDSET

An item specifically designed to mechanically accommodate, suspend, and/or position a handset when not in use. May include locking device. Does not establish switching facilities.

HOLDER,HEADSET

An item specifically designed to mechanically accommodate, suspend, and/or position one or more headsets when not in use. May include locking device. Does not inclose headset. See also BOX, HEADSET STORAGE.

HOLDER,MOUTHPIECE

SHUTTER,LOUDSPEAKER

A device consisting of a hinged or otherwise movable cover. It is specifically designed to open or close the mouth of a loudspeaker.

DIAPHRAGM,EARPHONE

An item in the form of a thin flexible sheet which is part of an earphone and is used to convert magnetic or mechanical energy into sound waves.

DIAPHRAGM,MICROPHONE

An item in the form of a thin flexible sheet which can be flexed by sound waves impressed upon it directly or indirectly utilizing this action in a microphone to convert sound waves into corresponding audio frequency electrical energy.

SHELL,EARPHONE

The inclosing case which houses the electrical and acoustical elements of a headphone. May include the acoustical elements.

SHELL,MICROPHONE

The inclosing case which houses the elements of a microphone.

BASE,STAND

BRACKET,MICROPHONE

See also ARM, MICROPHONE; BOOM, MICROPHONE; HOLDER, MICROPHONE and STAND, MICROPHONE.

HOLDER,MICROPHONE

HEADSET-MICROPHONE

An item consisting of a HEADSET, ELECTRICAL and a MICROPHONE (as modified) mounted on or supported from the head. It may include connecting cords, plugs, jacks, and switches. See also HEADSET-CHEST SET, ELECTRICAL.

BOX,HEADSET STORAGE

A box designed for the protection and storage of one or more headsets and accessories.

CASE,LOUDSPEAKER

CASE,MICROPHONE

HANDLE,HANDSET

That portion of a handset which is shaped to be grasped during use, and which contains provisions for mounting or inclosing the electrical elements. It may include items such as contacts, capacitors, resistors, switch, or have dial and/or switch, or have dial and/or switch mounting facilities. May include transmitting or earphone element but not both. See also HANDSET.

HEADBAND,HEADSET

An item which adjusts to the head and is designed to accommodate one or more telephone receivers. It may include cords and facilities for mounting a microphone or a telephone type transmitter but does not include receivers, microphones, or transmitters. See also HEADSET, ELECTRICAL and HARNESS (as modified).

BOOM,MICROPHONE

A projecting spar or outrigger-like structure which is used to suspend, position and/or support a microphone. May be adjustable. See also ARM, MICROPHONE; and STAND, MICROPHONE.

DIAPHRAGM,LOUDSPEAKER DRIVER

An item which is a part of a loudspeaker driver and which is vibrated by mechanical, magnetic or electrical means to produce air waves at audio frequencies. It may include a voice coil. See also CONE, LOUDSPEAKER.

LOUDSPEAKER,PERMANENT MAGNET

A loudspeaker whose diaphragm movements are produced by a coil or iron armature moving in the field of a permanent magnet.

DRIVER,LOUDSPEAKER

A device which converts electrical energy of audio frequencies into audible sound energy and is primarily designed to be used as the actuating mechanism of a LOUDSPEAKER (as modified).

CHEST SET,ELECTRICAL

A microphone designed to be worn on the chest of the user. It may include connectors, cords, jacks, and harness. A chest set with a headset is termed a HEADSET-CHEST SET, ELECTRICAL.

ARM,MICROPHONE

A rigid piece or part designed to be attached to another item or to other than a horizontal mounting surface for the purpose of supporting, suspending or positioning a microphone. May be adjustable. See also BOOM, MICROPHONE; and STAND, MICROPHONE.

STAND,LOUDSPEAKER

An item specifically designed to mount and/or support a loudspeaker(s) in a desired position from a horizontal mounting surface.

STAND,MICROPHONE

An item specifically designed to mount and/or support a microphone in a desired position from a horizontal surface. May be adjustable. See also BOOM, MICROPHONE; and ARM, MICROPHONE.

HARNESS,CHEST SET

An item consisting of adjustable straps or bands specially designed for supporting and positioning a chest set. See also HARNESS, MICROPHONE.

HARNESS,MICROPHONE

An item consisting of adjustable straps or bands specially designed for supporting and positioning a microphone. For items used with chest supported microphones, see HARNESS, CHEST SET.

ADAPTER,HANDSET

An item constructed to establish the necessary accommodations to connect two or more items, one or both being a handset, whose physical design or function will not normally warrant their connection. Does not include ADAPTER, CONNECTOR.

ADAPTER,HEADSET

An adapter designed to connect two or more items, one or both being a headset. Does not include ADAPTER, CONNECTOR.

ADAPTER,HEADSET-MICROPHONE

An adapter designed to connect two or more items, one or both being a headset-microphone whose design or function will not normally warrant their connection. Excludes ADAPTER, CONNECTOR.

ADAPTER,MICROPHONE

An adapter designed to connect two or more items, one or both being a microphone. Does not include ADAPTER, CONNECTOR.

CUSHION,EAR

An item made of soft material(s) designed to fit on an earphone shell of an electrical headset or on the muff of a hearing protector by a positive means of attachment, such as an elastic band or a clamp ring. Its purpose is to prevent external noises from reaching the ears of the user and to lessen physical discomfort occasioned by continuous use.

LOUDSPEAKER,CRYSTAL

A loudspeaker whose diaphragm movements are produced by the piezoelectric (crystal) element through which audio frequency current is flowing.

LOUDSPEAKER-CONTROL UNIT

A LOUDSPEAKER, CRYSTAL which has a control unit that allows a radio set to be turned on and off from a remote area.

BOX,HANDSET STORAGE

A box designed for the protection and storage of one or more telephone handsets when not in use. May include handset holder.

LOUDSPEAKER-AMPLIFIER

An item having the dual functions of a LOUDSPEAKER (as modified) and an AMPLIFIER, AUDIO FREQUENCY. May include volume control, on/off switch, connecting facilities, mounting hardware and/or an enclosure.

MODIFICATION KIT,ELECTRICAL AND ELECTRONIC EQUIPMENT

An item or collection of items employed to modify electrical and electronic equipment.

HEADSET-MICROPHONE,ELECTRICAL,STEALTHY

A device generally consisting of one earphone with a coiled acoustic tube, adiscreet microphone which may be operated by a PTT button, a junction box and the necessary connecting wires. The microphone may be attached to a clothing clip. This item may include a carrying poach, foam earbud covers, and a set of different types of earphones. Some models include two earphones. This item provides a discreet means of communication for bodyguards, agents or military personnel participating in covert operations. Excludes HEADSET-CHEST SET, ELECTRICAL (00710); and HEADSET-MICROPHONE (02928).

MICROPHONE SET

A grouping of items containing more than one microphone of the same type or different. Accessories and/or attachment/mounting hardware may be included.

PROTECTOR,ELECTRICAL CABLE

An item designed to be interposed between a cable and its support or housing to prevent chafing caused by contraction and expansion due to changes in the ambient temperature or damage or injury from outside sources. Excludes such items as loom, cotton sleeving, rubber blankets, grade clamps and all types of conduit and INSULATION SLEEVING, ELECTRICAL.

ROD,GROUND

An item designed to be driven into the earth for the purpose of establishing electrical contact. One end is pointed or tapered to facilitate entrance into the earth. See also ROD SECTION, GROUND.

JUNCTION BOX ASSEMBLY

Two or more junction boxes on a common mounting or mounted on each other. Do not use for single junction boxes which are complex or unusual in construction, or for a junction box with an extension. See also TERMINAL BOX.

CONDUIT ASSEMBLY,METAL,FLEXIBLE

A specific length of CONDUIT, METAL, FLEXIBLE with permanently attached ferrule(s), coupling nut(s), elbow(s), or the like. Excludes detachable fittings such as tee(s), wye(s), or elbow(s). Also, excludes conduit like items that are designed for other than electrical applications. See also CASING (as modified).

FANNING STRIP

An item made of rigid or semirigid insulating material for spacing or separating wire(s) and/or cable(s). For items having terminals, see TERMINAL BOARD; and INSULATOR (as modified).

POTHEAD

A form of terminator, usually used in power and telephone distribution, designed to be hermetically sealed to the cable(s) to exclude moisture. It may have terminals accessible for testing, or a junction block to facilitate the connecting of cable(s) and wire. See also SEALING FITTING, ELECTRICAL CONDUIT.

COVER,INTERCONNECTING BOX

COVER,SWITCH TERMINAL

An item generally made of insulating material and used to protect switch terminals against damage, shorting and grounding. Excludes COVER, ELECTRICAL SWITCH; BASE, SWITCH and HOUSING, SENSITIVE SWITCH.

CHAMBER,CABLE TERMINAL

An item specifically designed to admit, protect and seal conductor groups or cables and also affords a method of conveniently distributing, terminating and interconnecting the leads.

STUFFING TUBE

An item specifically designed to pass an electrical cable or tube through a continuous structure with provisions for packing so as to prevent the leakage of liquids and/or gases through the opening. May include packing nut(s), adapter(s), washer(s), gasket(s), bushing(s), packing(s), cap(s), and/or plug(s).

FASTENER,CORD ASSEMBLY

A fastener primarily designed to hold and secure a cord assembly so that pulling of the cord will not put a strain on the terminal connections.

PLATE,ELECTRICAL GROUNDING

A rigid or semirigid item of electrically conductive material whose thickness is small in comparsion to its length and width. It is designed to be used for electrical grounding, particularly in junction box and power outlet applications. Excludes TERMINAL STRIP, GROUNDING; CONTACT STRIP, RADIO FREQUENCY GROUNDING; and STRIP, ELECTRICAL GROUNDING.

COLLAR,CABLE

An item designed to be affixed around an electrical cable to limit the axial movement of the cable at the point where it passes through an opening. It has no facilities for retaining the cable to another object. Excludes BUSHING, STRAIN RELEIF, CABLE.

BASE,CHASSIS

BRACE,CROSSARM

An item specifically designed to provide reinforcement for a crossarm when mounted on a pole.

HANGER,CABLE

A metallic or nonmetallic item of various shapes, designed to position, suspend, support and/or secure electrical cable(s) to utility poles, bulkheads, messenger wires or other supporting surfaces. It may be fastened to the structure by means of rod(s), bolts(s), screw(s) and the like. Excludes CLAMP (as modified); HANGER, WIRE STRAND; BRACKET PIPE; and SUPPORT, ELECTRICAL CABLE.

PIN,INSULATOR

An item designed to be inserted into a crossarm for the specific purpose of mounting pin type electrical insulators. Excludes BRACKET, INSULATOR.

PLUG,STUFFING TUBE

An item designed to be fitted into the body of a STUFFING TUBE in order to prevent the leakage of liquids and/or gases through the opening in the absence of the cable normally passing through the tube.

SUPPORT,ELECTRICAL CABLE

A collapsible framework specifically designed to be placed on the ground to hold electrical cable above the ground surface. Excludes BRACKET, PIPE.

BUSHING,ELECTRICAL CONDUCTOR

An item of metal and/or insulating material having a smooth interior with rounded edges to prevent damage to the insulation of the wire or cable emerging there-from, designed to fit through panel(s) or the wall of a JUNCTION BOX. It may be designed to snap into a knockout hole, or designed with an external thread and furnished with or without a locking nut. For items designed to couple conduit to JUNCTION BOX, see BOX CONNECTOR, ELECTRICAL. See also BUSHING, ELECTRICAL CONDUIT and BUSHING, NONMETALLIC. For items having hexagonal shoulders, see CHASE NIPPLE, CONDUIT.

BRACKET,INSULATOR

An item designed to be attached to a supporting surface for the specific purpose of positioning and sustaining an electrical insulator(s). Includes brackets specifically designed for transposing electrical lines.

LINK,REINFORCING,CABLE

An item fabricated from metal rod bent longitudinally into an oval shape, one end of which is intended to fit a messenger cable or guy wire and the opposite end formed with a mounting hole for a lag screw. This item is designed to relieve the strain where a messenger cable or wire is installed at an angle to a suspension clamp.

ADAPTER,STUFFING TUBE

A threaded or unthreaded item designed to mate with the mounting threads or mounting surfaces of a STUFFING TUBE, and to mount the STUFFING TUBE to a continuous structure (bulkhead or deck). The adapter may be recessed on the face to accommodate a gasket and/or washer.

JUNCTION BOX

An enclosure of other than cast metal designed to house, mount, and protect, but does not include wiring connections or electrical device(s) such as terminals and/or terminal boards, switches, jacks, fuseholders, connectors, circuit breakers and the like. It is designed for and may include a cover and such accessories as mounting hardware, brackets, locks, clamps, mounts and conduit fittings. Excludes CONDUIT OUTLET; and CHAMBER, CABLE TERMINAL. For boxes which include electrical device(s) such as terminals and/or terminal boards, switches, fuseholders, jacks, connectors, circuit breakers and the like, or combinations thereof, see SWITCH BOX; FUZE BOX; JACK BOX; TERMINAL BOX; CIRCUIT BREAKER BOX; and DISTRIBUTION BOX. For boxes wired to provide the interconnecting facilities for a specific major group of electronic items outside of the box, see INTERCONNECTING BOX. See also INTERCONNECTING CABINET.

CABLE NIPPLE,ELECTRICAL

A preformed item having high electrical resistance designed for installation on end of cable or lead in order to cover the terminal or termination. It may partially cover the terminal of the item to which the cable or lead is attached. May also provide mechanical protection. Excludes INSULATION SLEEVING, ELECTRICAL.

CABINET,ELECTRICAL EQUIPMENT

An enclosure generally fabricated of sheet material designed to accommodate (but does not include) electrical/electronic equipment so that the equipment may be operated without removal. It may include wires, cables, terminal boards, connectors, etc., required for equipment operation. For items designed to accommodate equipment mounted on panels, see RACK, ELECTRICAL EQUIPMENT. See also CASE (2) (as modified). Excludes INTERCONNECTING BOX; INTERCONNECTING CABINET; JUNCTION BOX; and TERMINAL BOX.

RACK,ELECTRICAL EQUIPMENT

An open or inclosed frame structure designed to accommodate (but does not include) electrical/electronic equipment mounted on standard width panels so that the equipment may be operated after installation without being removed. It must have panel mounting rails that provide a uniform pattern of mounting holes that will accommodate various combinations of standard width panels. It may include wires, cables, terminal boards, connectors, and the like, required for equipment operation. See also MOUNTING BASE, ELECTRICAL EQUIPMENT; CABINET, ELECTRICAL EQUIPMENT; and CASE (2) (as modified). Excludes MAIN DISTRIBUTING FRAME, TELEPHONE and INTERMEDIATE DISTRIBUTING FRAME, TELEPHONE.

ENTRANCE CAP,ELECTRICAL

An item primarily designed to provide for the entrance of electrical wires into a building, structure, or inclosure and to facilitate their connection to feeders or service conductors. It consists of an insulating block and a metallic housing designed to hold the insulating block and to fit an electrical conduit, conduit fitting, or cable of a specified size. This item is primarily intended for use in exposed, wet, or damp locations and is installed so as to preclude the entrance of rain or debris into the conduit. See also CAP, ELECTRICAL.

ADAPTER,ELECTRICAL CONDUIT

An item designed to couple or join two different types or sizes of conduits, and/or to be inserted in the opening of a conduit outlet or box to accommodate a conduit of a larger or smaller size; or it may be designed with internal thread on one end for mating with an electrical connector and an external thread on the other end for mating with a conduit coupling nut; or to establish necessary mechanical accommodations between an electrical conduit, conduit assembly and an electrical connector. Excludes REDUCING WASHER, KNOCKOUT and BOX CONNECTOR, ELECTRICAL. See also ADAPTER, CABLE TO CONNECTOR; and CHASE NIPPLE, CONDUIT.

SEALING FITTING,ELECTRICAL CONDUIT

An item of metallic composition with a chamber for sealing compound and two hubs to accommodate electrical conduits of specified sizes. This item is designed with a filler hole and a removable screw plug to enable the pouring of sealing compound into the chamber for the purpose of preventing the passage of explosive gases through a conduit run. The item is primarily designed for use in hazardous locations and may be designed for vertical use, horizontal use, or both. For items which permit the connection or termination of wires, see POTHEAD. See also COUPLING, ELECTRICAL CONDUIT.

REDUCING WASHER,KNOCKOUT

An item consisting of a flat, cupped or embossed metallic disk with a centerhole to fit an electrical conduit of a specified size and which is specifically designed to reduce the knockout opening in a box, panel, or wireway for the convenience of terminating electrical conduit of smaller size than the knockout. Excludes ADAPTER, ELECTRICAL CONDUIT.

NIPPLE,ELECTRICAL CONDUIT

A nipple made of electrical conduit.

ENTRANCE ELBOW,ELECTRICAL

An item of metallic composition cast in the form of an elbow, which is primarily intended to provide for the angular entrance of wires into a building, structure, or enclosure. This item, specifically designed for installation in exposed locations, has two hubs of a specified size to fit the service entrance conduit and may have a third hub for a driven ground connection. It has a cover which makes it tamper-proof and weather-resistant. It may include facilities for pulling electrical conductors but does not have facilities for mounting wiring devices.

BUSHING,ELECTRICAL CONDUIT

An item of metal and/or insulating material having internal threads designed to fit over the end of electrical conduit and/or fittings to provide a smooth interior with a rounded edge to prevent damage to the insulation of the wire or cable emerging therefrom. It may be designed to fit over the end of thin wall conduit, and to be fitted with holding (staking) screws, or it may be provided with internal straight threads for attaching to thick wall electrical conduit or fittings. It may be fitted with a temporary knockout cap (bushcap), and grounding or bonding facilities. For externally threaded items, see BOX CONNECTOR, ELECTRICAL; BUSHING, ELECTRICAL CONDUCTOR; CHASE NIPPLE, CONDUIT and BUSHING, STRAIN RELIEF, CABLE. See also FERRULE, ELECTRICAL CONDUIT. Excludes plain sleeve bushings.

BONDNUT,ELECTRICAL CONDUIT

An item of metallic composition, with internal threads, designed to fit the external threads of an electrical conduit or fitting, and which, when installed, provides a method of tightening and locking the connection and completes a positive bond between the conduit and apparatus or fitting to which connected. The bonding or grounding action is accomplished by sharp beveled teeth or by a screw(s). See also LOCKNUT, ELECTRICAL CONDUIT and NUT, COUPLING, ELECTRICAL CONDUIT.

UNION,ELECTRICAL CONDUIT

An item comprising three members, so constructed that one of the members holds the remaining two in a fixed butted position; generally used to connect two conduits, conduit fittings, or a conduit and a conduit fitting in such a manner that they may be disconnected without disturbing the rest of the conduit line. See also COUPLING, ELECTRICAL CONDUIT.

ELBOW,ELECTRICAL CONDUIT

An item fabricated in the form of an elbow and having both ends threaded female, or with unthreaded connecting facilities on both ends, or connecting facilities on both ends, one of which is a male thread without boss or shoulder. If a locknut or bondnut is included, it shall not be considered as a thread boss or shoulder. It is primarily intended to connect conduit to conduit. It may have a removable cover to facilitate pulling wires, but does not include facilities for mounting wiring devices. For items having a removable cover to facilitate pulling wires and specifically designed for close installation in exposed outdoor locations and which may have facilities for an outside driven ground, see ENTRANCE ELBOW, ELECTRICAL. For items with one end having a male thread with a boss or shoulder, see BOX CONNECTOR, ELECTRICAL. For items having a removable screw cap for pulling wires, with the cap positioned 45 degrees from the connection facilities, see ENTRANCE ELBOW, ELECTRICAL. For items fabricated in the form of an elbow having both ends threaded male, see BEND, ELECTRICAL CONDUIT.

CONDUIT OUTLET

An item designed to be used in a conduit system for the purpose of providing outlets or attachments for electrical wiring devices and/or designed to provide access and facilitate installment of wires. It may or may not include a cover(s). It does not include wiring devices. Excludes ENTRANCE ELBOW, ELECTRICAL. See also JUNCTION BOX.

BEND,ELECTRICAL CONDUIT

An item fabricated in the form of a curved section specifically designed to mechanically join a conduit or conduit fitting to another conduit or conduit fitting. Items of this type do not have a boss or hub at either end, nor do they have facilities for mounting wiring devices or pulling electrical conductors. See also ELBOW, ELECTRICAL CONDUIT and CONDUIT OUTLET.

PLATE,WALL,ELECTRICAL

An item designed to mount directly on a bracket or an electrical current carrying wiring device(s) such as switch(es) or outlet(s) (receptacle). The bracket(s) or electrical current carrying device is mounted in a JUNCTION BOX. For trade designated items designed to be attached directly on or through a bracket or electrical wiring device to a CONDUIT OUTLET, see COVER, CONDUIT OUTLET. For items designed for mounting directly on a JUNCTION BOX, see COVER, JUNCTION BOX.

INTERCONNECTING BOX

An inclosure which includes mounts and protects such items as switches, circuit breakers, jacks, fuseholders, connectors, terminals and/or terminal boards, resistors, capacitors, transformers, and the like. It is primarily designed to interconnect two or more electrical and/or electronic items, except primary power source(s) such as generator(s) and battery(ies). It may include a cover or door. For inclosures which connect one or more primary power source(s) to one or more electrical and/or electronic item(s), see DISTRIBUTION BOX. See also CIRCUIT BREAKER BOX; TERMINAL BOX and INTERCONNECTING CABINET.

ROSETTE,ELECTRICAL

An item designed for the connection and support of an electrical drop cord.

STEP,POLE

An item designed to be used as a foot rest in ascending and descending utility poles, when attached thereto.

RACK,CABLE,UNDERGROUND

An item designed for the purpose of supporting cable(s). It is shaped like a channel and has a U like cross section with through holes, slots and the like, along the length. When mounted in the vertical position it will accept hooks which extend out perpindicularly from the surface to support cable(s). The item does not include hooks. See also RACK, CABLE, INTERIOR.

RACK,CABLE,INTERIOR

An open frame structure primarily designed to support electrical cables in buildings and shelters. Its purpose is to provide, by itself or by joining to similar structures, a path or runway for cable which may connect two or more pieces of electrical equipment. It does not include items designed to hold a single cable. See also RACK, CABLE, UNDERGROUND; and HANGER, CABLE.

FERRULE,ELECTRICAL CONDUIT

An item usually of one piece construction, but which may be comprised of more than one piece, designed to be affixed permanently or temporarily to the end of an electrical conduit to form an end fitting. Unflanged items form a permanent end fitting which affords mechanical protection to emerging conductors. Flanged items are used with another fitting normally a conduit coupling nut, to make the conduit adaptable for connection to an electrical connector, junction box or other conduit accessory or fitting. Excludes RING, ELECTRICAL BONDING; BUSHING, ELECTRICAL CONDUIT; and BUSHING, PLAIN SLEEVE. See also FERRULE-NUT COUPLING, ELECTRICAL CONDUIT.

HOOK,UNDERGROUND CABLE RACK

A rigid item designed to be perpendicularly attached to an underground cable rack to be used as the supporting arm for cables. May include insulators.

HOLDER,POLE STEP

A holder designed to accommodate a detachable pole step.

DISK,END SEAL,ELECTRICAL CONDUIT

A flat circular item fitted on the end of an electrical conduit in order to close the end to prevent the entrance of water or refuse, prior to installation of the wires, during shipment and/or construction. The item may be held in place by means of a conduit bushing and may be easily removed to permit installation of the wires.

SPACER,CABLE

An item constructed specifically to provide a separation between lashed lead covered cable and messenger strand for the prevention of injury to sheath of cable.

PLATFORM,POLE

An item specifically designed to be attached to a utility pole for the purpose of accommodating a workman in a standing or sitting position while engaged in the maintenance or installation of equipment.

BOX CONNECTOR,ELECTRICAL

An item designed to mechanically connect in a straight line or an angle electrical conduit, conduit assemblies, wire, wireway, cable, or cable assemblies to a point of termination, such as a junction box, conduit outlet, or the like. The termination end must have an external thread with a boss or shoulder and may be furnished with a locknut or bondnut; or, must have internal thread with which is furnished an externally threaded hub with a wrenching feature; or be of a snap-in type that may be installed from either inside or outside the box and secured with a captive screw. It is not intended to join conduit to conduit. For angle type items having a male thread without a boss or shoulder, see ELBOW, ELECTRICAL CONDUIT. Does not include facilities to mount wiring devices. Excludes CHASE NIPPLE, CONDUIT.

COUPLING,ELECTRICAL CONDUIT

An item specifically designed and constructed to mechanically connect in a straight line two sections of electrical conduit or like fabrication and of the same size. For three-piece items which may be disassembled without disturbing the rest of the conduit line, see UNION, ELECTRICAL CONDUIT. See also ADAPTER, ELECTRICAL CONDUIT; POTHEAD; and SEALING FITTING, ELECTRICAL CONDUIT.

WYE,ELECTRICAL CONDUIT

A type of electrical conduit fitting fabricated in the form of the letter Y, having three hubs permitting conduits and/or conduit fittings to be taken off laterally from the main line of equal degree on each side, or with the main line continuing straight with a branch taking off at an angle. For items of this type having facilities for mounting wiring devices, see CONDUIT OUTLET.

EXTENSION,CABLE RACK

A metallic irregularly shaped item designed to permit cable racks to be mounted away from the mounting surface to escape obstructions or limited space.

RING,ELECTRICAL BONDING

An item of metallic composition, usually round and flat with a center hole or slotted hole designed to accommodate an electrical cable or conduit, and which, when used in conjunction with a cable clamp or similar locking device, completes a positive bond between the cable or conduit fitting, such as connectors, adapters, and couplings, and the cable or conduit shield and/or individual conductor shield(s). See also FERRULE, ELECTRICAL CONDUCTOR.

BASE,ELECTRICAL EQUIPMENT RACK

A structural item which is specifically designed to provide a suitable flat surface to support one or more RACK, ELECTRICAL EQUIPMENT. It may include legs and/or leveling devices. For similar items designed primarily for the purpose of damping shock and/or vibration, see MOUNTING BASE, ELECTRICAL EQUIPMENT. See also STAND, (as modified).

PROTECTOR,SPLICE,ELECTRICAL CABLE

An item specifically designed to be mechanically fastened to an electrical cable on each end of a splice to protect the splice from excessive strain. It usually has provisions for making a waterproof or moisture-proof joint. Excludes INSULATION SLEEVING, ELECTRICAL.

NUT,COUPLING,ELECTRICAL CONDUIT

An item of metallic composition with internal threads and an internal seat designed to join a ferrule capped conduit to a fitting. See also BONDNUT, ELECTRICAL CONDUIT.

STRAP,INSULATOR BRACKET

An item specifically designed to reinforce insulator brackets at their fastenings on a line construction pole when high strength wire or long spans are used.

COVER,JUNCTION BOX

A cover containing facilities for mounting directly on a JUNCTION BOX. It may have provisions for the insertion and/or mounting of electrical devices, such as switches, connectors, additional covers, and jewels. It may include the jewel(s). For covers having facilities for mounting on brackets or on current carrying devices such as switches and receptacle connectors, see PLATE, WALL, ELECTRICAL. See also COVER, CONDUIT OUTLET.

HANGER,WIRE STRAND

A metallic item, grooved to fit a wire strand such as a messenger strand, and designed to be attached to a utility pole or other supporting surface for the purpose of horizontally suspending and firmly securing the wire strand. See also HANGER, CABLE, and CLAMP, ELECTRICAL CONDUCTOR, STRAIN. Excludes BRACKET, PIPE.

CROSS,ELECTRICAL CONDUIT

A type of electrical conduit fitting fabricated in the form of a cross having four hubs in the same plane, the axes of which form a right angle, and primarily intended to join electrical conduits and/or conduit fittings. For items of this type having ties for mounting wiring devices, see CONDUIT OUTLET.

TEE,ELECTRICAL CONDUIT

A type of electrical conduit fitting fabricated in the form of the letter T having three hubs for joining electrical conduits and/or conduit fittings. For items of this type having facilities for mounting wiring devices, see CONDUIT OUTLET.

PANEL,BLANK

A panel designed to fill a space not occupied by actual operating components, and may have instructions, component designations, or component identifications etched or printed thereon.

CASE,ELECTRICAL EQUIPMENT CABINET

CASE,SWITCH BOX

ROD SECTION,GROUND

An item which is part of a multi-section ground rod. Excludes items with driving points. see also ROD, GROUND.

EXTENSION,JUNCTION BOX

An item designed to be mounted on a JUNCTION BOX to increase the depth of the box.

PACKING NUT,STUFFING TUBE

A threaded or unthreaded device, with an unthreaded center hole to accommodate an electrical cable or tube, designed to mate with the threads or sealing components of a stuffing tube body for the purpose of compressing packing around the electrical cable or tube. A component of a STUFFING TUBE.

STRAP,SAFETY,WIRE STRAND HANGER

An item primarily designed to be attached to a cable suspension clamp mounting bolt, providing a guard or loop below the mounting bolt to support the cable should the messenger fail.

STRAP,SUPPORT,WIRE STRAND HANGER

An item primarily designed to provide additional support to the end of the clamp mounting bolt by transmitting a portion of the stresses to the pole or supporting member.

STRAP,SUPPORT AND SAFETY,WIRE STRAND HANGER

An item primarily designed to provide additional support to the end of a cable suspension clamp bolt by providing a linkage from the bolt end to the supporting member and is also extended below the suspension bolt to form a loop or guard to support the cable should a messenger fail.

GROUNDING SET,TRANSMISSION LINE

An item consisting of two or more clamp type devices with facilities for the connection of jumpers and/or grounding cables. When installed this item provides for the temporary grounding of de-energized electrical transmission line(s) to protect workmen against injury resulting from accidental re-energization of the lines. Excludes CLAMP, ELECTRICAL.

SLEEVE,MARKER,CABLE

A cylindrical item into which a wire or cable is inserted. It is inscribed for identification, to indicate connections or routing of electrical cables and the like. For unmarked items made of insulation material, see INSULATION SLEEVING, ELECTRICAL. For items secured by crimping, slot and tongue, or other similar methods of fastening, see BAND, MARKER.

CASE,STANDARDIZED COMPONENTS,ELECTRICAL

A case which by virtue of standardization of equipment dimensions is designed to contain one or more components of different basic names. Do not use for cases designed only for specific items or a specific grouping of items.

FERRULE-NUT COUPLING,ELECTRICAL CONDUIT

An item consisting of a FERRULE, ELECTRICAL CONDUIT upon which is permanently mounted a NUT, COUPLING, ELECTRICAL CONDUIT. It is designed to be attached to an electrical conduit and used to mechanically connect the conduit to another conduit fitting such as a box connector. Excludes BOX CONNECTOR, ELECTRICAL; ADAPTER, ELECTRICAL CONDUIT; and COUPLING, ELECTRICAL CONDUIT.

CLAMP,ELECTRICAL CONDUCTOR,STRAIN

A clamp designed to support and/or dead end a suspended conductor(s). Must have a provision for attachment to an insulator. Insulator is not included. Excludes HANGER, WIRE STRAND.

POLE,LANCE

An item of wood with one end pointed for insertion into the ground and the other end equipped or designed to have an attachment to mount insulator(s). It is used for supporting temporary wire communication lines.

SHELL,ELECTRICAL ENTRANCE CAP

An item similar to ENTRANCE CAP, ELECTRICAL, but it does not include an insulating block. See also CAP, ELECTRICAL.

CONDUIT,METAL,FLEXIBLE

A conduit constructed of circular flexible metal tubing. It may be shielded with a woven metal wire braid covering, with a packing between the joints, and it may have a rubber and/or synthetic rubber or plastic outer protective covering. It contains no fittings. See also CONDUIT, METAL, RIGID. Excludes conduit like items that are designed for other than electrical applications.

CONDUIT,METAL,RIGID

A conduit of one-piece tubular construction, designed as thin wall type (EMT) and thick wall type. The items may be threaded and furnished with a COUPLING, ELECTRICAL CONDUIT and/or thread protection. See also CONDUIT ASSEMBLY,METAL, RIGID. Excludes conduit like items that are designed for other than electrical applications.

CONDUIT,NONMETALLIC,RIGID

A conduit of one piece construction of asbestos and cement, bituminized fiber, or rigid plastics material. The item may have both ends processed for connection by means of a coupling. One coupling may be furnished for each length of conduit. The conduit may or may not be impregnated with coal tar pitch. Excludes conduit like items that are designed for other than electrical applications.

SPLICING KIT,RADIO FREQUENCY CABLE

A collection of items used in splicing a radio frequency cable, such as yokes, plugs, cable, switches, and power transformer.

DRIVE RING

A metal item having an eye attached or integral with a nail-like item. It is designed for running twisted pair, bridle, or parallel drop wires on building walls, fences, poles and the like. For similar items having threaded ends, see BRIDLE RING. Excludes HOOK, SUPPORT.

BRIDLE RING

A metal item having an open eye on one end and a wood screw, or machine thread on the opposite end. The machine thread item may be furnished with a nut or toggle attachment. It is designed for running twisted pair, bridle or parallel drop wires on building walls, fences, poles, and the like. For similar items having a drive nail end, see DRIVE RING. Excludes HOOK, SUPPORT.

LEG,ELECTRICAL EQUIPMENT

An item which, in conjunction with one or more similar items, aids in the support of electrical equipment. See also LEG SECTION, ELECTRICAL EQUIPMENT.

LEG SECTION,ELECTRICAL EQUIPMENT

An item which in itself is not a complete functioning item. It consists of parts which, together with other similar parts, form an electrical equipment leg.

CHASE NIPPLE,CONDUIT

An externally threaded item having a hexagonal shoulder with a smooth bore. It may be used to connect two junction boxes or to accommodate thin wall conduit or tubing by slip fit to a junction box or conduit outlet. It may or may not be furnished with a locknut. For items externally and internally threaded, see ADAPTER, ELECTRICAL CONDUIT. See also BUSHING, ELECTRICAL CONDUCTOR.

BUSHING,STRAIN RELIEF,CABLE

An insulating item designed to prevent movement along the axis of an electric wire or cable in either direction when placed in the chassis of such items as electric fans, irons, drills, motors, radios, clocks and the like. It may be designed for use in the central column of a gun mount and the like. See also COLLAR, CABLE.

CONDUIT ASSEMBLY,NONMETALLIC,ELECTRICAL

A specific length of tubing or conduit, nonmetallic, rigid or flexible, with or without electrical rating, and with permanently attached ferrule(s), coupling nut(s), or the like. It may include one or more woven wire braid cover(s). Excludes detachable fittings such as tee(s), wye(s) or elbow(s). Also excludes conduit like items that are designed for other than electrical applications.

COVER,CONDUIT OUTLET

An item of any material, with or without threads, designed to mate with a CONDUIT OUTLET or a SEALING FITTING, ELECTRICAL CONDUIT. It may be designed as a removable side plate cover with or without hubs. It may have provisions for draining or venting. It may be designed for the insertion and/or mounting of electrical devices, such as switches, receptacle connectors, and indicator light lenses. It may include mechanisms for the external operation of switches but does not include the wiring devices. For items designed to mount directly on a bracket or an electrical current carrying wiring device, see PLATE, WALL, ELECTRICAL. See also COVER, JUNCTION BOX.

CLAMP,COUPLING NUT,ELECTRICAL CONDUIT

An item designed to be clamped on a conduit. It has extending prongs to engage and lock in position a NUT, COUPLING, ELECTRICAL CONDUIT.

SHELF,ELECTRICAL EQUIPMENT

An item relatively thin in its vertical dimension, designed to provide a horizontal working surface on the front of a CABINET, ELECTRICAL EQUIPMENT or a RACK, ELECTRICAL EQUIPMENT. May include wiring, power outlets and similar accessories. May be furnished with slides to permit stowing within the cabinet or rack when not in actual use.

ELECTRICAL KIT,SHOP SET INSTALLATION

A collection of wiring and fixture items, such as box, cable, connector, cord, cover, cutout, fuse, receptacle, socket, switch, and the like, designed to wire shop set equipment when installing it in a shop truck as part of the basic load.

ALUMINUM CONDUCTOR CONTACT PASTE

An item consisting of a suspension of electrical conductive particles in a carrier of greaselike consistency, which is applied to aluminum conductor surfaces before a solderless electrical joint is made. The carrier excludes moisture and salt water from the joint and inhibits subsequent oxidation and corrosion. Excludes INSULATING COMPOUND, ELECTRICAL.

STRAP,LINE SUPPORTING

A flexible strap, furnished with a buckle, specificifically designed to support other items, such as cable(s), wire(s), tube(s), and the like. The buckle may be permanently assembled and may be provided with a mounting feature. The strap may be used to bridge a channel by mounting the buckle and strap separately. Excludes CLAMP, LOOP; STRAP, RETAINING; STRAP, LEATHER; and STRAP, WEBBING.

LOCKNUT,ELECTRICAL CONDUIT

An item having internal threads designed to fit the external threads of an electrical conduit or fitting for connecting to a junction box, panel, wireway, or other point of termination, and which, when installed, provides a method of tightening to lock the connection. The items may be either flat-sided or circular in external shape and must have a specific conduit size designation. SEE BONDNUT, ELECTRICAL CONDUIT and LOCKNUT, TUBE FITTING. Excludes NU T (1), PLAIN HEXAGON.

CONDUIT,NONMETALLIC,FLEXIBLE

A conduit of one piece flexible, nonmetallic, tubular construction. The item may have an outer covering for additional mechanical protection, a woven wire braid for interference suppression, and/or wire reinforcement. For items having rated electrical characteristics, see INSULATION SLEEVING, ELECTRICAL. Excludes TUBING, NONMETALLIC; and TUBING, PLASTIC, SPIRAL WRAP. Excludes conduit like items that are designed for other than electrical applications.

DRAWER,ELECTRICAL EQUIPMENT

An item designed to slide in and out of a CABINET, ELECTRICAL EQUIPMENT or RACK, ELECTRICAL EQUIPMENT and used to mount and/or store electrical/electronic equipment. It does not include the electrical/electronic equipment, but may include wires, cables, terminal boards, connectors, etc.

MOUNTING BASE,ELECTRICAL EQUIPMENT

A tray or racklike item designed to provide a supporting surface to which electrical/electronic equipment may be secured when installed in aircraft, vehicles, or other types of mobile equipment. It may be equipped with shock or vibration isolation devices and/or wires, cables, terminal boards, connectors, etc. Excludes BASE, ELECTRICAL EQUIPMENT RACK and MOUNT, RESILIENT. See also RACK, ELECTRICAL EQUIPMENT.

RACK,ELECTRONIC JUNCTION

An open frame structure specifically designed to accommodate (but does not include) electronic terminal junctions (TERMINAL BOARD; TERMINAL (1), FEEDTHRU; and the like). The item may consist of separable or nonseparable channels, mounting blocks and fastening devices. Mounting blocks are designed so the assembly can be mounted on panels or bulkheads. Tightening the fastening devices which secure the channels to the mounting blocks will also secure terminal junctions within the frame assembly. Excludes RACK, ELECTRICAL EQUIPMENT; TERMINAL BOARD; JUNCTION BOX; and HARDWARE KIT, ELECTRONIC EQUIPMENT.

PROBE,SAFETY SHORTING

A device used to discharge the voltage stored in cathode ray tubes and other electronic equipment which have capacitor type filtering circuits that retain a voltage charge after the primary power has been removed. See also DISCHARGER, ELECTROSTATIC.

MOUNTING BASE,TIE DOWN,ELECTRICAL

An item used in conjunction with STRAP, TIEDOWN, ELECTRICAL COMPONENTS to secure wire(s) or cable(s) to a supporting surface.

COVER,RACEWAY

An item used in conjunction with open style raceway for the protection of electrical wires and/or cables. May be attached by snap closure, stud and nut, or similar device. Generally furnished in bulk quantities.

RACEWAY,METALLIC

RACEWAY,NONMETALLIC

PANEL,ELECTRICAL-ELECTRONIC EQUIPMENT

A panel which is designed to accommodate, but does not include connectors, displays, indicators, jacks, meters, switches, and the like. It may include clinch nuts or fastening devices as part of the item. Excludes PANEL, BLANK.

JOINT BOX,ELECTRIC CABLE

A special box made of cast metal, molded or shrinkable plastic which encases the electric connections of two or more electric cables, protects them against tensions and other excessive wear by means of mechanical attachment to the cable covering, and keeps moisture, gasses, and other environmental conditions away from the splicing by means of sealing it with a special casting compound or by heatshrinkage or bonding. The JOINT BOX, ELECTRIC CABLE as a rule is buried in the ground or put on a cable rack and is not reusable. Assembly accessories may be included.

SUPPLEMENTARY EQUIPMENT,JOINT BOX,ELECTRIC CABLE

A pre-determined combination of different accessories which are packed as a set and are used as supplement to the normal assembly accessories of the JOINT BOX, ELECTRIC CABLE.

CHASSIS,ELECTRICAL-ELECTRONIC EQUIPMENT

A box, frame, or plate fabricated of electrically conductive material designed to mount, but which does not include, electronic components and their associated circuitry. It may have facilities for attachment to a rack or cabinet or to accommodate specially designed components. It may include a shielding function, integral wiring, and mounting hardware as part of the item. Excludes MOUNTING BASE, ELECTRICAL EQUIPMENT.

ELBOW,RACEWAY

An angular section of RACEWAY for making turns in a run of RACEWAY.

PLATE,MOUNTING

A metallic or nonmetallic item which is rigid, flat and generally smooth. Its thickness is small in comparison to its length and width. It is designed for mounting another item and may have drilled or threaded holes or other facilities for mounting to a supporting object or surface. See SUPPORT, as modified. Do not use if a more specific name applies.

ANCHOR PLATE,ELECTRICAL CONDUIT FERRULE

A piece of flat material, specially designed to secure a FERRULE, ELECTRICAL CONDUIT.

RACEWAY ASSEMBLY,NONMETALLIC

A channel consisting of one or more parts with other than circular cross sections. The item forms part of bulk quantities which have been specially treated and provided with miter heads and/or mounting holes, for example. It may also be produced in one piece by special molding processes such as thermoplastic pressure die-casting. The item protects electrical wires and/or cables against mechanical damage. Excludes RACEWAY (1), NONMETALLIC.

RACEWAY ASSEMBLY,METALLIC

A channel consisting of one or more parts with other than circular cross sections. The item is not supplied in bulk quantities and has a particular shape with specific dimensions conforming to a predetermined cable run (e.g., angular or U-shape). The item protects cables against damage. Excludes RACEWAY (1), METALLIC.

CROSSHEAD,CABLE

An item consisting of preformed material, cable clamps, a cover sheet and mounting hardware. It is designed for supporting and securing communication equipment interconnect cables with cable clamps in cases where the communication equipment is mounted in frame-type racks facing each other. The item has fixed dimensions and is prefabricated to a specific shape. It forms part of an INSTALLATION KIT (1), ELECTRONIC EQUIPMENT (e.g., for cabins). Excludes RACEWAY (1), METALLIC; RACEWAY ASSEMBLY, METALLIC; RACEWAY (1), NONMETALLIC; RACEWAY ASSEMBLY, NONMETALLIC.

FLANGE,SEALING,ELECTRICAL BOX

An item designed for tightly sealing those openings of a JUNCTION BOX towards the outside or inside that are neither provided for being connected with other JUNCTION BOX nor for cable entry. Excludes FLANGE, ADAPTER, ELECTRICAL BOX and FLANGE, ELECTRICAL BOX ENTRY.

FLANGE,ELECTRICAL BOX ENTRY

An item designed for tightly sealing the openings of a JUNCTION BOX, provided for cable entry, towards the inside or outside. It may include openings or knock-out holes with or without threads that are provided for the installation of STUFFING TUBE or other cable entries. Excludes FLANGE, SEALING, ELECTRICAL BOX and FLANGE, ADAPTER, ELECTRICAL BOX.

FLANGE,ADAPTER,ELECTRICAL BOX

An item which, through assembly of two or more JUNCTION BOX, forms a distribution system tightly sealing the junction openings towards the outside. Excludes FLANGE, ELECTRICAL BOX ENTRY and FLANGE, SEALING, ELECTRICAL BOX.

DIVIDER,ELECTRICAL BOX

A plate mounted vertically to the floor of a JUNCTION BOX which divides the interior of the box thus separating two or more electrical circuits or a plate compartmentalizing or sealing off one or more connection openings which occur when several JUNCTION BOX are connected to form a distribution section. Excludes FLANGE, SEALING, ELECTRICAL BOX.

FOOT,ELECTRICAL EQUIPMENT

An item which in conjunction with an electrical equipment leg or the like, aids in the support of electrical equipment. It is a broad based metallic or nonmetallic item which serves as a stabilizer.

CASE SECTION,STANDARDIZED COMPONENTS,ELECTRICAL

An item of various shapes or design representing an integral part of a CASE (2), STANDARDIZED COMPONENTS, ELECTRICAL. It may include fastening, sealing, padding and/or locking devices. It does not include components.

RAIL,GUIDE

An item used for fixing/mounting TERMINAL JUNCTION BLOCK, SECTIONAL.

TRAY,MOUNTING,ELECTRONIC EQUIPMENT

An item which facilitates the mounting of electronic/electrical equipment(s) into racks and the like, having holes and/or clamping devices enabling quick replacement of the mounted equipment. does not include the equipment for which designed. may include interconnecting facilities and resilient mountings. excludes DRAWER, ELECTRICAL EQUIPMENT, RACK MOUNTED; DRAWER, ELECTRICAL EQUIPMENT CABINET; CHASSIS, ELECTRICAL EQUIPMENT and PLATE, MOUNTING, ELECTRICAL EQUIPMENT.

PROTECTOR,ELECTRICAL CONDUCTOR

An item designed to be interposed between an electrical conductor which may be bare or insulated and its support or housing to prevent chafing caused by contraction and expansion due to changes in the ambient temperature or damage or injury from outside sources. Excludes such items as loom, cotton sleeving, rubber blankets, grade clamps, and all types of conduit and INSULATION SLEEVING, ELECTRICAL.

BASE,MOUNTING,ELECTRICAL FITTING

An item serving as a base for electrical pieces such as switches, ceiling roses. It is usually recessed at the base for accommodating wires.

MOUNTING LOCKING MECHANISM,MECHANICAL,AIRCRAFT EQUIPMENT

An item consisting of a worm gear which mesh with two worm pinions. They are inclosed in a housing which is fixed on a housing electrical/electronic equipment. They mate with two rack gears fixed on a RACK, STRUCTURAL, AIRCRAFT EQUIPMENT. When the worm gear is actuated by means of a handwheel, its spiral teeth mesh with the pinions teeth which engage with the rack gears teeth allowing the equipment to move in a straight line motion in slides fixed on the rack and on the housing equipment.

HANDLE,QUICK DISCONNECT,AIRCRAFT EQUIPMENT

A specially designed handle having an internal lock mechanism. It has two headed ends which mate two housing equipment apertures. When the trigger is actuated one of these ends moves laterally and locks the handle in the housing electrical/electronic equipment. It is used to facilitate handling of equipment which must be installed or replaced depending on aircraft missions.

CONDUIT ASSEMBLY,METAL,RIGID

A straight or prebent length of a CONDUIT, METAL, RIGID complete with permanently attached fitting(s), such as flanges, wye(s) and tee(s). See also TUBE ASSEMBLY, METAL and CASING (as modified). Excludes conduit like items that are designed for other than electrical applications.

INTERCONNECTING CABINET

An enclosure, the principal purpose of which is to house, protect, and provide a connecting or branching point for one or more electrical circuits. It is wired to provide the interconnecting facilities for a specific group of electrical and/or electronic items outside of the interconnecting cabinet. It may contain parts such as capacitors, resistors, fuses, relays and terminal boards. In addition, it includes panel(s) on which are mounted control and instrumenation devices associated with the internal components of the cabinet. For items not including such panels. See CABINET, ELECTRICAL EQUIPMENT. See also CIRCUIT BREAKER BOX; DISTRIBUTION BOX; INTERCONNECTING BOX; JUNCTION BOX and TERMINAL BOX.

PROTECTOR,ELECTRICAL CABLE ASSEMBLY

An item specifically designed to protect an electrical cable assembly from damage by other items during assembly and/or disassembly operations of associated equipment. Excludes such items as loom, cotton sleeving, rubber blankets, all types of conduit, INSULATION SLEEVING, ELECTRICAL and PROTECTOR, ELECTRICAL CABLE.

STRAP,TIE DOWN,ELECTRICAL COMPONENTS

A preformed item of flexible or semiflexible material of various cross-sectional shapes. It may be tapered to a point at one or both ends, or provided with holes, slots, detents, or other locking devices. It is designed to surround wiring harnesses and other electrical/electronic components. It may be preprinted with legendary characters, symbol(s), letter(s), numeral(s), or color coded, and may be provided with means for securing to other objects. Excludes BAND, MARKER; CLAMP, ELECTRICAL; CLAMP, LOOP; MARKER, IDENTIFICATION; and STRAP, RETAINING.

STOP,RAIL GUIDE,ELECTRIC COMPONENT

A metallic or nonmetallic item or various shapes designed to be attached at the end of a RAIL,GUIDE to prevent movement of electric component. It may include facilities for a pin, set screw, or the like to allow for adjustment.

END CAP,RACEWAY

An item which is used to close right and or left side of RACEWAY (WITH MODIFIER).

MOBILE CONTACT,ELECTRICAL GROUND

Item such as a brush, wheel and the like, designed to allow grounding of mobile machinery such as overhead cranes and the like. It may have fastening means such as bolts or the like and various mounting accessories. Excludes ROD,GROUND; PLATE,ELECTRICAL GROUNDING and CLAMP,ELECTRICAL CABLE.

GUARD,GROUND,ELECTRICAL CABLE

A metallic or nonmetallic item of various shape designed to be placed on floor to protect onr or several electrical cable or cord from damages caused by the personnel vehicular, equipment and the like. Excludes: PROTECTOR,ELECTRICAL CABLE and PROTECTOR,ELECTRICAL CABLE ASSEMBLY.

CONTACT SET,COLLECTOR RING

A grouping of two or more separate collector ring contacts.

HOLDER ASSEMBLY,ELECTRICAL CONTACT BRUSH

An item consisting of two or more HOLDER, ELECTRICAL CONTACT BRUSH on a common mounting or mounted on each other, or one HOLDER, ELECTRICAL CONTACT BRUSH mounted on a bracket. May include facilities for applying pressure to the brush(es) and may also be furnished with the brush(es). For items consisting of two or more brush holders (boxes) cast as an inseparable unit, see HOLDER, ELECTRICAL CONTACT BRUSH. See also RING, HOLDER, ELECTRICAL BRUSH.

BRUSH,ELECTRICAL CONTACT

An item specifically designed to be used in the transfer of electrical energy to or from another conducting surface. Either the brush or the surface is continually moving during the transfer of energy. The brush is usually composed in part of some form of the element carbon. Includes: (1) a single brush either with or without an attached shunt (flexible wire lead) and/or a helical or flat type pressure spring; (2) a split brush composed of two or more pieces (wafers), which are used in place of one brush usually connected together by individual shunts to a common terminal; (3) paired brushes composed of two identical or non-identical brushes connected together by a common shunt either with or without pressure springs or connected by individual shunts to a common terminal, or with pressure springs and connected to a common bar, bracket or the like either with or without individual shunts; (4) multiple brushes composed of more than two identical or non-identical brushes without pressure springs connected by individual shunts to a common terminal, or with pressure springs and connected to a common bar, bracket or the like by individual shunts. Does not include moving contacts which make and slide past stationary contacts, but are stationary while the circuit is conducting, such as the sliding contacts on a rheostat or the stationary contact on a synchro. Excludes: CONTACT, ELECTRICAL; and CONTACT ASSEMBLY, ELECTRICAL.

RING ASSEMBLY,ELECTRICAL CONTACT

Two or more electrical contact rings on a common mounting or mounted on each other. May include contacts, integral brushes, brush holder assemblies, and connectors.

RING,ELECTRICAL CONTACT

An item consisting of a continuous electrically conductive material of circular or ring shape specifically designed to be used in conjunction with a contact brush to establish an electrical circuit between a rotating item and a stationary item. See also COMMUTATOR.

ELECTRODE

An item of electrically conductive material which acts as a terminal through which an electric current enters or leaves a liquid or gas. The item does not provide filler material or act as a lighting media. Excludes ELECTRODE, WELDING; ELECTRODE, CUTTING, TUBULAR and ELECTRODE, CARBON, LIGHTING.

HOLDER,ELECTRICAL CONTACT RING

HOLDER,ELECTRICAL CONTACT BRUSH

A holder designed to accommodate and position a brush against a commutator or collector ring. Also includes items consisting of two or more brush holders (boxes) cast as an inseparable unit. May include facilities for applying pressure to the brush(es) and may also be furnished with the brush(es). See also HOLDER ASSEMBLY, ELECTRICAL CONTACT BRUSH.

CARBON STOCK,ELECTRICAL CONTACT BRUSH

A solid material composed of carbon or some mixture thereof. It is designed to be fabricated into electrical contact brushes.

HOLDER,ELECTRODE

Excludes HOLDER, ELECTRODE, WELDING.

BRUSH SET,ELECTRICAL CONTACT

A combination of two or more brushes conforming to the item name BRUSH, ELECTRICAL CONTACT, used as a set in a specific piece of equipment. The individual brushes may be identical or nonidentical. For two or more brushes connected together by a common shunt, pressure bar, etc., see BRUSH, ELECTRICAL CONTACT. Excludes CONTACT ASSEMBLY, ELECTRICAL and CONTACT SET (as modified)

ELECTRODE,CARBON,LIGHTING

An item, circular in cross section designed to act as a lighting media by sustaining an incandescent electric arc between it and a like item when their tips are in proper proximity to each other. See also ELECTRODE, FULGURATION.

ELECTRODE SET,CARBON,LIGHTING

A group of two or more ELECTRODE, CARBON, LIGHTING, having different characteristics.

ARM,ELECTRICAL CONTACT BRUSH

An item designed to transmit pressure to a BRUSH, ELECTRICAL CONTACT for the purpose of maintaining contact between the brush and another conducting surface for the transfer of electrical energy. The item may include one or more pressure springs or tension springs.

INSERT,ELECTRICAL CONTACT BRUSH HOLDER

An item designed to fit into a HOLDER, ELECTRICAL CONTACT BRUSH to form an integral liner or seat for positioning or holding one or more BRUSH, ELECTRICAL CONTACT.

RING,ELECTRICAL CONTACT BRUSH HOLDER

An item made of metallic or insulating material to form a rigid loop whose axial length does not exceed 25 percent of its outside dimensions. It performs the function of retaining and positioning one or more HOLDER, ELECTRICAL CONTACT BRUSH. The item does not include the brush holder(s).

PARTS KIT,BRUSH,ELECTRICAL CONTACT

SEGMENT,RING,ELECTRICAL CONTACT

An item which when coupled with additional like items forms a RING, ELECTRICAL CONTACT. Item is supplied in arc-like sections. Items is composed of nonconductive material and may provide insulation. Item is designed to have BUS, CONDUCTOR, and the like mounted or molded to it.

GUARD,SEGMENT,RING,ELECTRICAL CONTACT

A rigid item which protects a SEGMENT, RING, ELECTRICAL CONTACT. It usually has an irregular cross-section and extend through an arc of less than 360 degrees.

CURRENT COLLECTOR

An item which, via sliding contacts, continually transfers electrical energy from contact wires to electrically driven machines such as trains, cranes, lamps, tools, and the like.

GROUNDING ASSEMBLY,SHAFT

A group of items designed to be used in cathodic protection systems.

PARTS KIT,ELECTRICAL CONTACT BRUSH HOLDER

COVER,PHOTOELECTRIC CELL

HOLDER,PHOTOELECTRIC CELL

SEMICONDUCTOR DEVICE,PHOTO

A Semiconductor Device (1) which is responsive to visible or infrared radiant energy. May or may not include mounting hardware and/or heat sink. Excludes SEMICONDUCTOR DEVICE (1), DIODE; SEMICONDUCTOR DEVICE (1), THYRISTOR AND TRANSISTOR. For solid state devices which emit visible or infrared radiant energy, see LIGHT EMITTING DIODE.

LIGHT EMITTING DIODE

A two electrode, solid state, optoelectronic device that emits visible or infrared radiant energy when electrically energized. May or may not include mounting hardware and/or heat sink. Excludes LAMP, CARTRIDGE; and LIGHT, INDICATOR. For solid state devices which are responsive to infrared or radiant energy, see SEMICONDUCTOR DEVICE (1), PHOTO.

SEMICONDUCTOR DEVICE ASSEMBLY

A grouping of two or more semiconducting devices such as LIGHT EMITTING DIODE; SEMICONDUCTOR DEVICE, DIODE; SEMICONDUCTOR DEVICE, PHOTO; SEMICONDUCTOR DEVICE, THYRISTOR; and/or TRANSISTOR mounted on a common mounting or mounted on each other. The devices must be separable and each item must be capable of functioning in accordance with its given name. For assemblies consisting of semiconducting devices permanently cased, encapsulated, or potted together to form a single unit, see RECTIFIER, SEMICONDUCTOR DEVICE, UNITIZED and SEMICONDUCTOR DEVICES, UNITIZED. Excludes SEMICONDUCTOR DEVICE SET; MICROCIRCUIT ASSEMBLY; and MICROCIRCUIT SET. See also ABSORBER, OVERVOLTAGE.

DISPLAY,OPTOELECTRONIC

A component capable of displaying numeric, alphanumeric, symbolic, or graphic characters utilizing light emitting diode, plasma gas discharge, vacuum fluorescent, or liquid crystal display technology. For items designed to display information of a specific type, see INDICATOR, (as modified).

CONTROL,OPTOELECTRONIC DISPLAY

A control that determines the mode of operation of an optoelectronic display.

CONTROL-DISPLAY,OPTOELECTRONIC

A item composed of a DISPLAY, OPTOELECTRONIC and an integral CONTROL, OPTOELECTRONIC, that performs the dual function of controlling the operational mode of, and presenting numeric, alphanumeric, symbolic, or graphic characters on an optoelectronic display. For items that do not include a control device, see DISPLAY, OPTOELECTRONIC. For items which are designed to display quantitative information in a specific format, see INDICATOR (as modified), and CONTROL-INDICATOR.

SWITCH,OPTOELECTRONIC

A switch designed to perform the function of opening and/or closing one or more electrical circuits. In lieu of seperable contacts, the switching function is accomplished by means of an arrangement of one or more light emitters and one or more photosensitive devices. The item functions in response to changes in its own electrical circuit caused by the emitted light being reflected to the photosensitive device or the emitted light being interrupted before it reaches the photosensitive device. The item has no other form of actuation.

AMPLIFIER-PHOTOELECTRIC CELL

A dual functioning device consisting of an amplifier (1) and an item which directly transforms light energy into corresponding values of electrical energy.

COUPLER,OPTOELECTRONIC

A device containing one or more light sources (either incandescent, glow, or solid state, lamps) opticallycoupled to one or more semiconductor type photo-sensitive elements, all of which are contained in an opaque enclosure. Light generated within the device by the application of an appropriate electrical input to the light source(s) acts upon the light sensor(s) to produce a corresponding output or change in some electrical quantity or variation in some electrical property. For items in which the light in directed at another item and the reflected light is interpreted (read) see SCANNER, OPTICAL.

FLANGE,WAVEGUIDE

A waveguide fitting with a projecting rim, edge or ridge whose inside dimensions are designed to be affixed to a waveguide for the purpose of joining with another electrical fitting.

COUNTERPOISE,ANTENNA

A conductor or system of conductors, fabricated or arranged in a specific pattern, to simulate the properties of an electrical ground.

SPARK GAP

An item designed to act as a switching or triggering device by means of a disruptive discharge of electricity (a spark) between the electrodes. The insulation (usually air) between the electrodes is self-restoring after passage of the spark. For spark gaps used as a protective device, see ARRESTER, ELECTRICAL SURGE. For items with additional circuitry which perform complete modulation functions, see MODULATOR, RADAR.

ADAPTER,WAVEGUIDE

An item designed to establish the necessary accommodations to connect a waveguide to a coaxial line, or to connect two or more terminated waveguides whose physical design does not normally allow connection.

MAST

An item essentially of columnar shape, having a single footing or mounting base, used to support another item. It may include accessories such as guys, insulators, and collars. See also TOWER. For similar items of this type used to carry power and/or communication lines, see POLE, LINE CONSTRUCTION (as modified)

MAST SECTION

An item that is specially designed and fabricated to be readily assembled together with other sections to form a MAST.

HORN,WAVEGUIDE

A hollow conductor of varying cross-sectional area specifically designed to achieve directional characteristics in radio frequency radiating and receiving systems.

REFLECTOR,ANTENNA

An object placed at a distance from a source of radiation, and designed to change the direction of incident radiation without appreciable transmission through it. It is used with an antenna. See also ANTENNA ELEMENT.

WAVEGUIDE ASSEMBLY

An item consisting of one or more definite lengths of straight or formed, flexible or rigid, prefabricated hollow tubing of conductive material. The tubing has a predetermined cross section and is designed to guide or conduct high frequency electromagnetic energy through its interior. One or more ends are terminated. May include common mounting of a SWITCH, WAVE GUIDE, a DUMMY LOAD, ELECTRICAL and other components such as waveguide section, cable terminal chamber and the like. Excludes COUPLER, ROTARY, RADIO FREQUENCY; COUPLER, DIRECTIONAL; ADAPTER, WAVEGUIDE; and TUNER, WAVEGUIDE.

CAVITY,TUNED

An inclosure, with a conductive inner wall, whose resonant frequency is determined by its internal dimensions. For calibrated items which are used to measure wavelength or frequency, see WAVEMETER; see also FREQUENCY METER.

CONVERTER,FREQUENCY,ELECTRONIC

An electronic device having frequency mixing circuits and an integral oscillator which mixes the incoming frequency(ies) with the oscillator frequency, the resultant frequency(ies) being a combination of the two sources. Includes equipment that performs these functions at either radio or power line frequencies. Excludes items that change frequency by means of rotating equipment or rectifier and switching or keying circuitry.

DUMMY LOAD,ELECTRICAL

A specific electrical element or set of electrical elements that are connected together to form a fixed arrangement and used as a substitute load for terminating an electrical circuit. A dummy load contains all the essential electrical characteristics necessary to terminate the circuit but does not function in the same manner as the load which it replaces. Examples are resistors used to replace antennas, batteries, loudspeakers, or the like. Includes single port terminations of twin lead, coaxial and waveguide transmission lines as low power terminations of a section of a transmission system in a specified manner. Includes dummy loads when arranged in a group or bank. Excludes power absorbers. See also LOAD BANK, ELECTRICAL.

PROBE,WAVEGUIDE

An item terminating a coaxial line whose center conductor is designed to extend beyond the inner surface of a waveguide or resonant cavity. The purpose of the item is to radiate or absorb radio frequency energy. May include connector(s), retainer(s) and/or protective accessory(ies). See also BOLOMETER, RADIO FREQUENCY.

ATTENUATOR ASSEMBLY

Two or more separable ATTENUATOR, FIXED and/or ATTENUATOR, VARIABLE having a common mounting or mounted on each other. Excludes single attenuators with multiple sections. For tandem attenuators actuated by a single shaft, see ATTENUATOR, VARIABLE. Also, see ATTENUATOR SET.

COUPLER,ROTARY,RADIO FREQUENCY

An item which provides a means of transfer of electrical energy between two components or sets, and which is specifically designed to permit one section of a transmission line or waveguide to rotate continuously with respect to another, and still maintain radio frequency continuity.

COUPLER,TRANSMISSION LINE

A coupler which permits the passage of electrical energy in either direction between a balanced and an unbalanced transmission line. See also COUPLER, ROTARY, RADIO FREQUENCY.

COUPLER,DIRECTIONAL

An item specifically designed to be inserted into a transmission line, waveguide or coaxial transmission line to provide a suitable test outlet. The test signal is attenuated to a predetermined value.

FAIRLEAD,ANTENNA

An item consisting mainly of a plastic, wood, or metallic tube with a funnel shaped end through which a trailing antenna is reeled.

WAVEGUIDE

An item consisting of a hollow tube of conductive material having a predetermined cross section specifically designed to guide or conduct high frequency electromagnetic energy through its interior. Does not include coaxial cable. Refers to bulk quantities only.

ANTENNA CONTROL GROUP

A collection of items that provides facilities for the control of antenna(s) and associated radome(s).

ANTENNA COUPLER-POWER SUPPLY

ANTENNA GROUP

A collection of items, that provide antenna facilities for the reception and/or transmission of electromagnetic energy.

ANTENNA SET

Two or more antennas, or antenna assemblies which are independently mounted.

RADOME INTERIOR CONTROL GROUP

A collection of items, that provide facilities for controlling the interior conditions such as pressure, temperature, humidity, and lighting in a radome.

ANTENNA CONTROL SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an antenna control but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

ANTENNA PEDESTAL SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an antenna pedestal but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

ANTENNA SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an antenna but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

ATTENUATOR SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an attenuator but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

COVER,ELECTRICAL LOAD DUMMY

ANTENNA

An item consisting of a conductor or a system of conductors specifically designed to radiate and/or receive electromagnetic waves in free space. May include beam-forming devices, drive motors, synchros, radome, and associated mechanical structure.

ATTENUATOR,VARIABLE

A device for reducing the strength of an alternating current signal either continuously or in steps, without causing appreciable signal distortion, by maintaining substantially constant output and/or input impedance match. Continuously variable resistive devices must consist of at least two sections or one section with at least two rotating contacts. The item must have an overall attenuation rating. Includes tandem mounted variable resistors designed to function as an attenuator but whose terminals are not connected. See also RESISTOR, VAIABLE (as modified).

STOP,ANTENNA

An item designed to check the movement or action of an antenna. Do not use if a more specific item name appears in this index.

LINE,RADIO FREQUENCY TRANSMISSION

An item designed primarily for the conduction of radio frequency energy, and consisting of two or more conductors supported in fixed spatial relationship(s) along their own length. Since the characteristic impedance of the line is determined by the spatial relationships of the conductors, which are sufficiently rigid to maintain these relationships between supports, the configuration of the item is usually not susceptible to mechanical manipulation; that is, it is not normally flexible. Includes a single conductor inclosed in an outer concentric conductor (coaxial) or two or more conductors laid parallel. All types have low loss or special characteristics at high frequencies. May include fittings or terminations. For items having continuous homogeneous dielectric, see CABLE, RADIO FREQUENCY. See also LINE SECTION, RADIO FREQUENCY TRANSMISSION.

CONTROL,ANTENNA

An item which provides the means for selecting the mode of operation or to direct the DRIVE, ANTENNA to carry out the input instructions. For items which provide coordinate information, see PROGRAMMER, ANTENNA POSITION.

LINE SECTION,RADIO FREQUENCY TRANSMISSION

A fabricated or processed item which forms a portion of a transmission line or which when added to complementary items will form a transmission line or a portion thereof. Do not use if a more specific item name now exists in the index. See also TUNER, TRANSMISSION LINE and LINE, RADIO FREQUENCY TRANSMISSION.

TUNER,WAVEGUIDE

An item designed to be inserted in a waveguide and which can be controlled to electrically increase or decrease its dimensions so as to minimize the standing wave ratio. See also TUNER, TRANSMISSION LINE.

SHUTTER,WAVEGUIDE

A waveguide section which contains a switching device to permit the interruption or diversion of the radio frequency energy by means of a mechanical barrier.

SEAL,RADIO FREQUENCY TRANSMISSION LINE

An item designed to provide termination for a gas filled radio frequency transmission line.

ANTENNA ELEMENT

An item which is a single conductor and is designed as a replaceable part of an antenna dipole or antenna.

COUPLING,WAVEGUIDE

A device specifically designed to conveniently couple and lock together mating surfaces of two adjacent sections of a waveguide.

LOADING DISK,ANTENNA

An item of conductive material, usually of circular or cylindrical shape, designed to be affixed to the top of a vertical antenna to increase its natural wave length.

PLATE,ANTENNA MAST

An item which is rigid or semirigid, flat and generally smooth. Its thickness is small in comparison to both its length and width, and it is so designed as to be used with an antenna mast.

PLATE,MOUNTING,ANTENNA COUPLER

An item that is rigid, flat, and generally smooth, the thickness of which is small in comparison to its length and width, and which is designed for mounting an antenna coupler.

PLATE,MOUNTING,ANTENNA COVER

An item which is rigid, flat, and generally smooth. Its thickness is small in comparison to its length and width, and is designed for mounting an antenna cover.

REFLECTOR SECTION,ANTENNA

An item which is one of the mechanically similar and complementary parts which together form an antenna reflector.

SEAL,WAVEGUIDE

An item or assembly designed to be fitted into or external to the end of a waveguide, in order to prevent the entrance of moisture or other foreign matter, without appreciably attenuating radio frequencies. May or may not be pressure proof.

SLEEVE,ANTENNA SUPPORT

A cylinder whose ratio of axial length to the outside diameter is four to one or greater, and which is used with an antenna support.

SUPPORT,ANTENNA

An item which consists of a mechanical or structural part designed to overcome the force of gravity, but is not intended to be the principal sustaining member of an antenna.

SUPPORT,ANTENNA HORN

An item which consists of a mechanical or structural part designed to overcome the force of gravity, but is not intended to be the principal sustaining member of an antenna horn.

SUPPORT,ANTENNA REFLECTOR

An item which consists of a mechanical or structural part designed to overcome the force of gravity, but is not intended to be the principal sustaining member of an antenna reflector.

SUPPORT,RADIO FREQUENCY TRANSMISSION LINE

An item which consists of a mechanical or structural part designed to overcome the force of gravity, but is not intended to be the principal sustaining member of a radio frequency transmission line.

SUPPORT,WAVEGUIDE

An item which consists of a mechanical or structural part designed to overcome the force of gravity, but is not intended to be the principal sustaining member of a waveguide.

SUPPORT RING,ANTENNA

An item, circular in design, and consisting of two bearing surfaces and antifriction bearings specifically designed to provide facilities for imparting rotational motion to an antenna mounted on it. It may include items such as synchros, limit switches, and contactors.

VANE,WAVEGUIDE

An item in the form of a plate or a knifelike blade designed to be part of a waveguide attenuator or a waveguide shutter.

BASE,ANTENNA SUPPORT

BASE,MAST

CRADLE,ANTENNA MAST

A support or frame which is shaped to conform generally to the contour of an antenna mast and which is used to hold the mast when not in use.

CRADLE,ANTENNA REFLECTOR

A support or frame which is shaped to conform generally to the contour of an antenna reflector, and which is used to hold an antenna reflector when not in use.

HOLDER,ANTENNA COUPLER

HOLDER,SPARK GAP

CONTROL,INFLATION,RADOME

An item which controls the mode of operation of fans, pumps or other means of inflating a radome. It may include indicating instruments, relays, manual adjustments, fuse holders, switches.

SPREADER,ANTENNA

An item specifically designed to space or hold apart the free swinging electrical conductors of an antenna or counterpoise. Usually includes grooves or fittings for attachment of conductors and for a bridle used to attach the antenna to a mast or other support. For similar items specifically designed for insulating purposes, see INSULATOR (applicable modifier).

PANEL,PATCHING,ANTENNA

An item on which are mounted plugs, sockets, and the like, and which are provided a point at which a radio set may be connected to various antennas or antenna arrays by means of patch cords, U-links, or similar methods. May include an indicator for display of output power from the radio transmitter.

TUNER,TRANSMISSION LINE

An item designed to be inserted in a transmission line and which can be controlled to electrically lengthen or shorten the line so as to minimize its standing wave ratio. See also TUNER, WAVEGUIDE and NETWORK, IMPEDANCE MATCHING.

LOBE SWITCH,ANTENNA

An item specifically designed for systematically shifting the radiation pattern of an antenna. May include motor. Excludes SWITCH, WAVEGUIDE and SWITCH, RADIO FREQUENCY TRANSMISSION LINE.

SWITCH,WAVEGUIDE

An item specifically designed for mechanically or electronically positioning one or more waveguide sections so as to couple it or them to other sections in a waveguide system. The switching function may be operated by a manual actuator, an electromechanical actuator or by means of an arrangement of semiconductors and passive circuit devices. Excludes RELAY, (as modified).

SWITCH,RADIO FREQUENCY TRANSMISSION LINE

An item specifically designed for mechanically or electronically positioning one or more radio frequency transmission line sections so as to couple it or them to other sections in a radio frequency transmission line system. The switching function may be operated by a manual actuator, an electromechanical actuator or by means of an arrangement of semiconductors and passive circuit devices. Excludes RELAY, (as modified).

CASE,ANTENNA

A case specifically designed to hold an antenna, an antenna element(s), or antenna section(s).

CASE,ANTENNA ALIGNMENT KIT

CASE,ANTENNA COUPLER

CASE,ANTENNA PEDESTAL SUBASSEMBLY

CASE,ANTENNA REFLECTOR

CASE,ANTENNA REFLECTOR SUPPORT

CASE,DIRECTIONAL COUPLER

CASE,ELECTRICAL DUMMY LOAD

CASE,MAST

A case specifically designed to hold a mast or a mast section(s).

ANTENNA ASSEMBLY

An item consisting of two or more separately excited antennas on a common mounting or mounted on each other. Do not use for a single antenna which is merely complex or unusual in construction.

PEDESTAL,ANTENNA

An item specifically designed to support and rotate an antenna(s). It may also support related components such as transmitters, receivers, or modulators. It may include accessory items such as drive motors, synchros, contactors, or collector rings. See also TOWER.

PLATFORM,ANTENNA PEDESTAL

An item consisting of a flat surface and its mounting supports, designed to be placed at some level other than the base of the antenna pedestal, for the purpose of supporting equipment and/or maintenance personnel.

ADAPTER,ANTENNA TO TRANSMITTER

An adapter which provides facilities for electromechanically adapting the output circuit of a transmitter of one impedance to an antenna of a lower or higher impedance, while simultaneously providing dynamic electrical loading of the circuit for stabilization of the frequency generating component against undesirable external loading.

DRIVE,ANTENNA

A device which may rotate or position an antenna in response to and external control signal. It is not designed to support an antenna.

ATTENUATOR,FIXED

A device for reducing the strength of an alternating current signal by a fixed or predetermined amount, without causing appreciable signal distortion, by maintaining correct impedance match.

COUPLER,ANTENNA

A coupler which provides a means of transfer of electrical energy between an antenna and other components. See also LINE, RADIO FREQUENCY TRANSMISSION; CABLE ASSEMBLY (as modified); and NETWORK, IMPEDANCE MATCHING.

ADAPTER,ANTENNA TO ANTENNA BASE

ADAPTER,MAST

An item constructed to establish the necessary accommodations to connect two or more masts whose physical design or function will not normally warrant their connection.

RADOME

An item which incloses an antenna. It is specifically designed to permit maximum passage of radio frequency energy through it, while providing protection to the antenna from weather. The item may also inclose the antenna support, and rotating mechanism. It may be flexible or rigid, streamlined or irregular shaped. May also include pressurizing mechanism and anti-icing or de-icing equipment. See also COVER, ANTENNA ELEMENT.

WEIGHT,WIRE ANTENNA

An item designed to facilitate the unreeling of a wire antenna.

TIE ROD,ANTENNA SUPPORT

An item long in relation to its cross section, that connects and maintains relative position between two antenna supports. It is not intended to overcome the force of gravity. The ends are usually processed to provide mounting facilities. May include mounting hardware.

COVER,ANTENNA

Excludes RADOME.

COVER,ANTENNA BASE

COVER,ANTENNA ELEMENT

COVER,ANTENNA SUPPORT

COVER,RADOME

A cover designed to protect a RADOME from mechanical damage while the inclosed antenna is not in use.

COVER,WAVEGUIDE FLANGE

COVER,WAVEGUIDE HORN

VANE,ANTENNA

A mechanical item which is added to a rotating antenna to maintain constant wind loading of the antenna during rotation by presenting a greater surface to the wind as the surface presented by the antenna reflector decreases.

AMPLIFIER-REGULATOR GROUP

A collection of items which provides amplifying and regulating facilities.

ANTENNA COUPLER GROUP

A collection of items, that provides coupling facilities between an antenna and another compatible component(s).

ANTENNA DEICING SET

A collection of items, for removal of ice that has formed on an antenna.

ANTENNA ELEVATOR GROUP

A collection of items, for raising and lowering an antenna.

ANTENNA SUPPORT GROUP

A collection of items supporting an antenna. May include integral components.

CONTROL-COUPLER GROUP

A collection of items, which provides the dual function of control and coupling.

DUMMY LOAD GROUP,ELECTRICAL

A collection of items, that provide electrical dummy load facilities.

STAND,ANTENNA

Excludes INSULATOR, STANDOFF.

CONTROL,ANTENNA ELEVATOR

A control which determines the mode of operation of an antenna elevator.

ADJUSTER,SPARK GAP ELECTRODE

An item specifically designed to position and space the electrodes in a spark gap. Excludes GAGE, GAP SETTING.

DISK,SPARK GAP

CONTROL,ANTENNA COUPLER

A control that determines the mode of operation of an antenna coupler.

DRIVE,ANTENNA ELEVATOR

An electromechanical device for transferring external operating forces to an antenna elevator.

ELEVATOR,ANTENNA

An item specifically designed to raise and lower an antenna. Does not include the antenna.

ISOLATOR,RADIO FREQUENCY REFLECTION

A device which allows radio frequency energy to pass in one direction with very little power loss, but blocks the flow of energy in the other direction by means of multiple WAVE-polarization or an integral dissipative load. It isolates frequency sensitive circuity from the effects of reflected radio frequency energy resulting from component mismatch. It usually has one or more ports terminated with coaxial connector(s) and/or waveguide flange(s); or other electrical terminations. Isolators designed for internal use in waveguide runs may consist of rods, rings, chips, strips and the like and have no ports or terminations. See also DIPLEXER; DUPLEXER. Excludes CIRCULATOR, RADIO FREQUENCY.

SELECTOR,ANTENNA

An item which automatically discriminates between radio frequency signals impinging on two or more antennas, and will connect that antenna which provides optimum signal strength from a desired transmitting source of one or more radio receivers. See also SELECTOR, RECEIVER SIGNAL.

DISCRIMINATOR,LOADING-PHASING

An item which electronically loads and resonates an antenna and transmission line system in accordance with changes in the operating frequency of associated equipment. Resonance and loading is effected by the application of control voltages to an antenna coupler. Control voltages are derived by the electrical discrimination of the angular phase shift resulting from standing wave ratios when the radiation system is in an off-resonance condition. Excludes DISCRIMINATOR, ELECTRICAL FREQUENCY and TRANSFORMER, DISCRIMINATOR.

LEG,TRIPOD MOUNT

An item which, in conjunction with two similar items, aids in the support of a machine gun, recoilless gun, rifle or the like. It is a component of a MOUNT, TRIPOD (as modified); or a TRIPOD, RIFLE MOUNT; and may be a single or sectional item with an integral or nonintegral foot. Excludes LEG, GUN MOUNT. See also LEG SECTION, TRIPOD MOUNT.

LEG SECTION,TRIPOD MOUNT

An item which in itself is not a complete functioning item. It consists of parts which, together with other similar parts, form a LEG, TRIPOD MOUNT.

MIXER,CRYSTAL,COAXIAL

An item consisting of coaxial line and associated connectors having two frequency inputs, a crystal (any semiconductor device that provides rectification) and an output connection. It is employed to mix two frequencies, with the resultant output frequency being a composite of the two inputs. For items utilizing electron tube(s) and/or WAVEGUIDE ASSEMBLY, see MIXER STAGE, FREQUENCY; and MIXER, CRYSTAL, WAVEGUIDE.

MIXER,CRYSTAL,WAVEGUIDE

An item consisting of a WAVEGUIDE ASSEMBLY having two frequency inputs, a crystal (any semiconductor device that provides rectification) and an output connection. It is employed to mix two frequencies, with the resultant output frequency being a composite of the two inputs. For items which also utilize electron tube(s), see MIXER STAGE, FREQUENCY. See also MIXER, CRYSTAL, COAXIAL.

FRAME,MOUNTING,ANTENNA COVER

A framelike item of varied shapes provided with holes or other means for holding a COVER, ANTENNA in place. Excludes PLATE, MOUNTING, ANTENNA COVER.

CASE,RADIO FREQUENCY TRANSMISSION LINE

DIPLEXER

An item designed to allow a single antenna to be used for simultaneous transmission and reception on different frequencies. It is installed in a transmission line or waveguide system between the transmitter(s) and/or receivers and a common antenna. It may have provisions for tuning.

CIRCULATOR,RADIO FREQUENCY

A waveguide, stripline, or coaxial component having three or more ports (terminals), so arranged that energy entering one port is transmitted to the next adjacent port in a particular direction while decoupling the energy from all other ports. Excludes SWITCH, RADIO FREQUENCY TRANSMISSION LINE; and SWITCH, WAVEGUIDE.

ANTENNA-MAST GROUP,COMMUNICATION,TRUCK-MOUNTED

An item consisting of two or more masts, each having an array of two or more antennas and one or more amplifier(s) to receive and transmit voice or digital data when used in conjunction with appropriate electronic equipment. The masts telescope and fold for transport.

COUPLER,DIRECT CURRENT BLOCKING

A coupler which is specifically designed to be inserted into a coaxial transmission line to permit flow of radio frequency electrical energy while preventing the flow of signals below 20 kilohertz (kilocycles). It consists of a short section of coaxial line which has a capacitance in series with the center and/or outer conductor. See also COUPLER (1), DIRECT CURRENT SHORTING; COUPLER, DIRECTIONAL and COUPLER (1), TRANSMISSION LINE.

COUPLER,DIRECT CURRENT SHORTING

A coupler which is specifically designed to be inserted into a coaxial transmission line to permit the flow of radio frequency electrical energy while providing a circuit between the center and outer conductors for signals below 20 kilohertz (kilocycles). It consists of a short section of coaxial line which has a high impedance line shunted across the inner and outer conductors. See COUPLER (1), DIRECT CURRENT BLOCKING; COUPLER, DIRECTIONAL; and COUPLER (1), TRANSMISSION LINE.

ATTENUATOR SET

A grouping of two or more individual ATTENUATOR, FIXED and/or ATTENUATOR, VARIABLE which may or may not include a case or other facility for storage and rapid access to individual attenuators. For items which are mounted on a common mounting or mounted on each other, see ATTENUATOR ASSEMBLY.

SWITCH,ANTENNA UNIT

This item provides switching of radio frequency signals from antennas to receiver-synthesizer. The antenna switching unit also receives switching commands from the receiver-synthesizer that determine which high band, mid band and lowband signals are to be switched.

AMPLIFIER-COUPLER,RADIO FREQUENCY

An item having the dual function of an amplifier and a coupler to provide automatic tuning to a variety of antennas by matching impedance levels.

COVER,ROTARY COUPLER

An item which is used to fully or partially enclose a COUPLER, ROTARY, RADIO FREQUENCY.

RIB,STIFFENER,ANTENNA

An item used to brace the interior or exterior of an antenna.

ACCESSORY KIT,ANTENNA

An accessory kit designed to connect an ANTENNA to a trailer or other equipment, consisting of guy wires, stakes, miscellaneous hardware, and the like. Excludes ANTENNA COUPLER GROUP.

LOCK ASSEMBLY,ANTENNA MAST

A device designed to secure a MAST, excludes LEVER, MANUAL CONTROL.

SHIM,WAVEGUIDE

A piece of metallic material designed to fit between two FLANGE, WAVEGUIDEs for the purpose of ensuring a low electrical resistance between the faces of the flange.

WAVEGUIDE ASSEMBLY,FILTER

A WAVEGUIDE ASSEMBLY which is specifically designed to pass frequencies within a range and to suppress frequencies outside that range. It may contain one or more tuned cavities, and tuning devices such as capacitive screws and the like.

REPAIR KIT,RADOME

An assortment of tools, patch materials, and application accessories required for the reconditioning of a RADOME.

PANEL,RADOME

A preformed item composed of materials that facilitate the passage of radio frequency energy, which forms a portion of a RADOME. It may contain facilities for mounting and have attachment points for pressurizing and de-icing equipment.

ANTENNA,COMMUNICATIONS,TRAILER MOUNTED

A unit used to receive and transmit voice or digital data when used in conjunction with the appropriate electronic equipment. The antenna(s) can be folded for transportation and may include various pieces of support equipment for operation.

INCLINOMETER,ANTENNA

A inclinometer, usually activitated by gravity and usually graduated in degrees, which is used on an antenna.

DRIER,WAVEGUIDE

An electrically driven, automatic functioning device for continuous operation designed to dry and pressurize the waveguide run between the radar set and antenna-system.It protects the radar set from malfunction.

SPARE PARTS KIT,WAVEGUIDE DRIER

An assortment of items used in the repair of a DRIER, WAVEGUIDE or the replacement of waveguide parts.

MODIFICATION KIT,ELECTRICAL AND ELECTRONIC EQUIPMENT

An item or collection of items employed to modify electrical and electronic equipment.

SPIKE,MAST BASE

A metallic item having one end pointed or tapered to facilitate entrance into the ground with other ends formed into a hook to retain ground position of a BASE, MAST.

ADAPTER,THEODOLITE MOUNTING,ANTENNA DRIVE

An adapter of various designs with provisions to facilitate connection of a theodolite to an antenna drive unit.

DIVIDER,POWER,RADIO FREQUENCY

An item specifically designed to separate incoming radio frequency power into predetermined proportional values at its output terminals.

DUPLEXER-MIXER

A single component with the combined dual function of duplexing and mixing electronic signals. May include integral isolator and interconnecting waveguide.

HANDLE,ANTENNA

An item which is the gripping portion of a hand-held ANTENNA. It is shaped to be grasped during use and contains provisions for mounting or inclosing a portion of the coaxial cable and connections.

INDICATOR,ANTENNA POSITION

An indicator that displays the physical position of an antenna in relation to one or more predetermined axis. See also METER, ANTENNA TILT.

MONITOR,ANTENNA-RADOME ROTATION

An item which presents operational information derived from an antenna and its associated radome, to determine the departure of one from the other with respect to azimuth alignment.

PROGRAMMER,ANTENNA POSITION

An item which provides coordinate information, dependent upon input data, to be used for slewing the antenna or directing the beam so that its radiation and/or acquisition pattern is within a predetermined free space volume. See also CONTROL, ANTENNA and DRIVE, ANTENNA.

PROTECTOR,ANTENNA

A reusable, fabricated, rigid item designed to protect an atenna during handling, operation, maintenance, and shipping operations.

TRANSLATOR,SIGNAL DATA

An item that processes a restricted bandwidth data modulated signal received on a wide band carrier frequency, to a standardized single radio frequency, and conversely processes a locally generated data modulated signal within a restricted bandwidth to a standardized single radio frequency, for transmission within the restricted bandwidth on any incremental frequency on the wide band carrier frequency. See also CONVERTER, SIGNAL DATA.

TRIPOD,ANTENNA

A specifically designed open framework structure consisting of three legs hinged or rigidly affixed at the top to a central mounting head, plate, or the like, which provides the principal support for an antenna. Each leg is designed to be attached at the base to a permanent footing or may include integral footing or base plate.

POLARIZER,ANTENNA

An item generally mounted in or outside a waveguide and designed to modify the electromagnetic wave characteristics of the wave emitted by radar or other equipment.

ANTENNA GROUP,COMMON GROUND STATION

A mobile station specifically designed and configured to carry antennas, mast, tripod antenna assembly, or miscellaneous antenna support equipment for its host system and prime mover. The unit may have transit cases, straps and brackets to hold, fasten or tie-down the antennas and accessories.

ANTENNA CONTROL UNIT

A hydraulic manifold which contains all fluid control valves for controlling hydraulic fluid to the hydraulic motor in the antenna drive unit on the mast, determining direction of antenna mast rotation and rotation speed. It also generates control signals for activating solenoids to raise or lower the antenna. For items consiting of less than complete hydraulic control system see ANTENNA CONTROL GROUP. EXCLUDES: ANTENNA GROUP; ANTENNA CONTROL SUBASSEMBLY; and ANTENNA CONTROL GROUP.

MODIFICATION KIT,WAVEGUIDE DRIER

A Modification Kit designed to modify a DRIER, WAVEGUIDE. It may affect the application, efficiency, or stability of the drier in a manner not previously inherent in the original blueprint.

PEDESTAL ASSEMBLY,EXTERNAL SENSORS

An item specifically designed to support a MAST ASSEMBLY, EXTERNAL SENSOR.

MAST ASSEMBLY,EXTERNAL SENSORS

An item having a single mounting base, used to support items, such as, external sensors, aspirators, hygrothermometers, associated hardware, and the like.

HEATER,ANTENNA

An electrical device consisting of a resistance element or a conducting polymer and may include insulating material, sheathing, supports, electric terminals and automatic controls to regulate the amount of heat generated or to detect ice build up or low temperatures. These heaters are designed to protect antennas, antenna pedestals or radomes from the effects of ice or low temperatures. Includes antenna heaters used in space, on land, aircraft and watercraft. Excludes items used as residential, industrial, or commercial space heaters, fluid heaters or solid material heaters.

PORTAL,RADIO FREQUENCY IDENTIFICATION

A fixed or mobile/transportable antenna(s) and support structure used to provide pallet size or larger load pass thru, for the purpose of reading Radio Frequency Identification tags without breaking down into individual packages. The unit may also be used as a personnel control point when used with Radio Frequency Identification Enabled Cards.

SECTOR,GRADUATED,ANTENNA POSITION

An item graduated in degrees, designed to check that an ANTENNA is correctly folded, when not in use (zero position). Excludes INDICATOR, ANTENNA POSITION.

ACCESSORY KIT,MAST

A collection of items for setting up a mast, such as guy reels, winch, guy stakes, list of contents and bag.

BAG,ANTENNA

A container made of flexible material, designed to carry a ANTENNA. It may have facilities such as handle(s), and/or starp(s) for carrying and may also have interior and exterior pockets as well as dividers for seperating and securing equipment and accessory. EXCLUDES: CASE,ANTENNA and COVER,ANTENNA.

TRIPLEXER

A multiplexer consisting of one input and three outputs. The single input is common to all three individual filters with separate outputs. This device is used to separate three separate frequencies via a transmission line attached to the "common" port of the transmitter and then separated through the outputs covering those frequencies.

NOSE CONE ASSEMBLY,POD,GLOBAL POSITIONING SYSTEM

The front section of an aircraft pod. It attaches to the pod shell and houses antenna(s) and related components of a NAVIGATION SET,SATELLITE SIGNALS.

STRAP,HOISTING ANTENNA

An item consisting of textile webbing and/or wire network. It is designed for hoisting antennas and related main assemblies.

REMOTE CONTROL,INSTRUMENT-EQUIPMENT

A wired or wireless transmission device that provides remote control for equipment or instrument by pressing buttons mounted on the device. Excludes REMOTE CONTROL,HANDHELD,UNIVERSAL; REMOTE CONTROL,HANDSET,TELEVISION; REMOTE CONTROL HANDSET,VIDEO and REMOTE CONTROL RADIO DEVICE,HANDHELD.

MOBILE DIRECTIONAL ANTENNA SYSTEM

A system designed to receive live metadata and video images from various types of manned and unmanned aircraft systems within a fifty kilometer range. It combines real-time unmanned aircraft systems video and metadata into a visual representation of the point of interest. (FOR OSRVT USE ONLY)

INSTALLATION KIT,MAST

An installation kit consisting of STAKE,GUY and GUY designed to physically establish and install a MAST. It may include accessories such as support, pulley, winch, mounting hardware, and the like. Excludes: ACCESSORY KIT,MAST.

ADAPTER,SYNCHRO

COVER,SYNCHRO RECEIVER MOUNT

SYNCHRO,DIFFERENTIAL RECEIVER

A synchro, the rotor of which is free to turn, which will assume a position in accordance with the sum or difference of the electrical angular information received from two transmitter synchros. Does not include variable resistors, goniometers, variable transformers, or items with dials.

SYNCHRO,DIFFERENTIAL TRANSMITTER

A synchro, the rotor of which is mechanically positioned for modifying electrical angular information, received from a transmitter synchro and transmitting to receiver synchro or control transformer synchro electrical information corresponding to the sum or difference of the electrical input angle and its rotor position angle. Does not include variable resistors, goniometers, variable transformers, or items with dials.

SYNCHRO,RECEIVER

A synchro consisting of a stator and rotor inductively coupled. The rotor is free to turn in accordance with the electrical input from a transmitter synchro or a differential synchro. Does not include variable resistors, goniometers, variable transformers, or items with dials.

SYNCHRO,TRANSMITTER

A synchro consisting of a stator and rotor inductively coupled. The electrical output of the stator into a receiver synchro, a control transformer or differential synchro is dependent upon the position of its rotor. Does not include variable resistors, goniometers, variable transformers, or items with dials.

INDICATOR,BLANK SCALE,SYNCHRO

An item utilizing a syncho-actuated pointer which traverses an unmarked scale area on the face of the instrument. Suitable inscriptions may be made on the scale area to indicate various factors such as altitude, frequency, position, temperature, time, volume, and the like. See also METER, ARBITRARY SCALE.

POWER SUPPLY-SYNCHRONIZER

A component having the dual functions of a power supply and a synchronizer. The power supply must be used to supply power to one or more associated major components and may also supply power to the synchronizer.

SYNCHRO,CONTROL TRANSFORMER

A synchro consisting of a stator and rotor inductively coupled. The electrical output of the rotor is dependent upon both the position of the rotor and the electrical input to the stator from a transmitter synchro or a differential synchro. Does not include variable resistors, goniometers, or variable transformers.

RESOLVER,ELECTRICAL

An item consisting of a rotor and a stator inductively coupled. It usually has two rotor windings displaced from each other by 90 degrees and two stator windings similarly displaced. The output voltage(s) is a trigonometric function of the input voltage(s) and the angular displacement of the rotor with respect to the stator. See also SYNCHRO (as modified) and GONIOMETER, ELECTRICAL. Excludes TRANSOLVER, ELECTRICAL and potentiometer sine/cosine electrical resolvers.

SYNCHRO,RECEIVER-TRANSMITTER

A synchro having a dual purpose. It may be used in applications requiring either a receiver or transmitter. For synchros having a single purpose, see SYNCHRO, RECEIVER and SYNCHRO, TRANSMITTER.

RESOLVER,ELECTRICAL,LINEAR

An item consisting of a stator and rotor inductively coupled which provides accurate linear indication of shaft rotation about a reference position in the form of a polarized voltage whose magnitude is proportional to angular displacement and phase relationship indicates direction of shaft rotation. Its windings and slots are not uniformly distributed, but instead are deliberately modified to produce a linear output which is usually limited to less than plus or minus 90 degrees of effective electrical travel. Normally it has only one energization winding and one output winding. See also RESOLVER, ELECTRICAL.

TRANSOLVER,ELECTRICAL

An item consisting of a rotor and a stator inductively coupled. It has wye connected and quadrature windings, either of which can be stator or the rotor and serve as the Primary for input voltages. The output voltages are trigonometric functions of the input voltages and the angular displacement of the rotor with respect to the stator. See also SYNCHRO (as modified). Excludes RESOLVER, ELECTRICAL and potentiometer sine/cosine electrical resolvers.

ENCODER,SHAFT ANGLE TO DIGITAL

An electromechanical device, the electrical output of which represents in digital form a mathematical function of the angular position of the input shaft. See also CONVERTER, ANALOGUE TO DIGITAL.

ROTOR,SYNCHRO

A rotor which is part of a synchro.

STATOR,SYNCHRO

A stator which is a part of a synchro.

SYNCHRO ASSEMBLY

Two or more synchros on a common mounting or mounted on each other. Do not use this name for single synchros mounted with common synchro accessories such as pulleys, gear reduction units, starting mechanisms.

CABLE ASSEMBLY,TELEPHONE

A definite continuous length of CABLE, TELEPHONE having one or both ends processed and/or terminated in fittings which provide for connection to other items. Excludes items having branches or forks. See also CORD ASSEMBLY, ELECTRICAL.

WIRING HARNESS

An item consisting of two or more individually insulated conductors (solid, stranded, or tinsel) of a definite length, with or without shielding, held together by lacing cord, metal bands, or similar type binding. The individual conductors are usually identified by color, or by alphabetic or numeric codes or symbols. The item may include fittings which provide for connection to other items. Excludes items which are branched, forked, jacketed, sleeved, or contained in a common covering. Also excludes CABLE ASSEMBLY (as modified); HARNESS, ELECTRICAL EQUIPMENT; LEAD ASSEMBLY, ELECTRICAL; and WIRING HARNESS, BRANCHED.

CABLE ASSEMBLY,POWER,ELECTRICAL

A definite continuous length of CABLE, POWER, ELECTRICAL having one or both ends processed and/or terminated in fittings which provide for connection to other items. Excludes CABLE AND CONDUIT ASSEMBLY, ELECTRICAL and items having branches or forks. See also WIRING HARNESS.

CABLE ASSEMBLY,SPECIAL PURPOSE,ELECTRICAL

A definite continuous length of CABLE, SPECIAL PURPOSE, ELECTRICAL, having one or more ends processed or terminated in fittings which provide for connection to other items. Excludes items having branches or forks. Excludes LEAD, TEST and CABLE AND CONDUIT ASSEMBLY, ELECTRICAL.

CORD ASSEMBLY,ELECTRICAL

A definite length of CORD, ELECTRICAL having one or both ends processed and/or terminated in fittings which provide for connection to another item. It is generally used with telephone and communication equipment, such as headsets, category cable and switchboard patch cable. See also CABLE ASSEMBLY, (as modified and LEAD (as modified.)

CABLE ASSEMBLY,RADIO FREQUENCY

A definite length of CABLE, RADIO FREQUENCY having one or both ends processed and/or terminated in fittings which provide for connection to other items. Includes multiple cable assemblies in a common jacket or shield. Excludes items having branches or forks and LEAD, TEST. See also CABLE ASSEMBLY, RADIO FREQUENCY, BRANCHED.

PANEL,PATCHING,ANTENNA

An item on which are mounted plugs, sockets, and the like, and which are provided a point at which a radio set may be connected to various antennas or antenna arrays by means of patch cords, U-links, or similar methods. May include an indicator for display of output power from the radio transmitter.

LEAD,ELECTRICAL

A definite length of one-conductor electrical wire, wire braid, or other conductive material, except cable or cord, one or both ends of which are processed or terminated. The lead may be of any size or shape, insulated or uninsulated. See also LEAD, TEST and BUS CONDUCTOR. Excludes LEAD, STORAGE BATTERY; LEAD, IGNITION, ENGINE, and items having attached switches, lampholders, suppressors, resistors, and the like.

CASE,CABLE ASSEMBLY

A case specifically designed to hold one or more cable assemblies.

CABLE ASSEMBLY SET,ELECTRICAL

A grouping of items having the same basic name for use in connection with, or the performance of, a closely related operation having two or more separate electrical cable assemblies. It may include cable reels and holders. It may or may not be inclosed in separate cases. See also CABLE ASSEMBLY, POWER ELECTRICAL; CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL; and WIRING HARNESS (as modified).

CABLE ASSEMBLY AND REEL

An item consisting of a CABLE ASSEMBLY (as modified) and a REEL, CABLE. Designed to facilitate rapid interconnection of dispersed electrical and/or electronic components and for cable storage during transit.

LEAD SET,ELECTRICAL

Two or more different LEAD, ELECTRICAL. For two or more identical items, use LEAD, ELECTRICAL. Excludes LEAD SET, TEST.

CABLE ASSEMBLY,PRINTED,FLEXIBLE

A definite continuous length of flat electrical cable consisting of two or more deposited, etched, or printed conductive paths laminated between insulating films and having one or more ends processed or terminated with facilities which provide for connection to other items. It may also provide facilities for connections to other items at locations other than the ends of the cable. For items with solid and/or stranded conductors, see CABLE (as modified); CABLE ASSEMBLY (as modified); and WIRING HARNESS (as modified). For rigid items consisting only of electrical conductor paths and two or more connectors, see BACKPLANE ASSEMBLY. See also PRINTED CIRCUIT BOARD and PRINTED WIRING BOARD.

CABLE ASSEMBLY SET,RADIO FREQUENCY

A grouping of items having the same basic name for use in connection with, or the performance of a closely related operation having two or more separate CABLE ASSEMBLY, RADIO FREQUENCY. It may or may not be enclosed in separate cases. Excludes CABLE ASSEMBLY, RADIO FREQUENCY; CABLE ASSEMBLY, RADIO FREQUENCY, BRANCHED and WIRING HARNESS (as modified).

WIRING HARNESS SET,ELECTRICAL

A grouping of items having the same basic name for use in connection with, or the performance of a closely related operation having two or more separate WIRING HARNESS. It may or may not be inclosed in separate cases. Excludes WIRING HARNESS; WIRING HARNESS, BRANCHED.

SUPPLEMENTARY EQUIPMENT,ELECTRONIC

A collection of various electronic equipment such as CABLE ASSEMBLY, (as modified); ADAPTER, (as modified); CONVERTERS, (as modified); LEAD SET, ELECTRICAL; DISPLAY UNIT; PRINTER, AUTOMATIC DATA PROCESSING; and the like. Designed to provide inter-connectivity and or intraconnectivity between various configuration of command and control modules, such as COMMAND POST AUTOMATION SYSTEM and COMBAT SUPPORT SYSTEM, CRYPTOLOGIC in the battle field functional area. Excludes INSTALLATION KIT, ELECTRONIC EQUIPMENT. See alsoMODIFICATION KIT, (as modified) and PARTS KIT, (as modified).

COVER,CABLE ASSEMBLY AND REEL

A preformed, detachable item made of textiles or plastics and designed to protect a CABLE ASSEMBLY AND REEL against damaging effects such as humidity, soilage and the like. It may also serve as camoflage. The item may consist of several parts and be equipped with fixtures such as straps, ropes and the like. Excludes TARPAULIN.

CABLE ASSEMBLY,RADIO FREQUENCY,BRANCHED

A definite continuous length of CABLE, RADIO FREQUENCY with branches (forks), and having one or more ends processed and/or terminated in fittings which provide for connection to other items. Excludes LEAD, TEST. See also WIRING HARNESS.

CABLE ASSEMBLY,SPECIAL PURPOSE,ELECTRICAL,BRANCHED

A definite continuous length of CABLE, SPECIAL PURPOSE, ELECTRICAL with branches (forks), and having one or more ends processed and/or terminated in fittings to provide for connection to other items. Excludes LEAD, TEST. See also wiring harness.

CABLE ASSEMBLY,TELEPHONE,BRANCHED

A definite continuous length of CABLE, TELEPHONE with branches (forks), and having one or both ends processed and/or terminated in fittings which provide for connection to other items. See also CORD ASSEMBLY, ELECTRICAL, BRANCHED.

CORD ASSEMBLY,ELECTRICAL,BRANCHED

A definite continuous length of CORD, ELECTRICAL with branches (forks), and having one or more ends processed and/or terminated with fittings which provide for connection to other items. See also WIRING HARNESS, BRANCHED.

WIRING HARNESS,BRANCHED

An item conforming to the definition of WIRING HARNESS with branches (forks). See also CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL, BRANCHED, Excludes LEAD ASSEMBLY, ELECTRICAL; and LEAD, TEST.

DUMMY CABLE ASSEMBLY,ELECTRICAL,BRANCHED

An item designed to occupy the space of a branched electrical power or special purpose cable assembly, without having the electrical characteristics of either cable assembly.

CABLE ASSEMBLY,RIBBON,ELECTRICAL

A definite continuous length of ribbon type CABLE, SPECIAL PURPOSE, ELECTRICAL, having one or more ends (may or may not be branched) and/or intermediate positions processed or terminated with facilities which provide for electrical connections to other items. Excludes CABLE ASSEMBLY, PRINTED, FLEXIBLE; CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL; AND CABLE ASSEMBY, SPECIAL PURPOSE, ELECTRICAL BRANCHED.

CONTACT SET,INTERRUPTER

A grouping of two or more separate interrupter contacts. Excludes CONTACT ASSEMBLY, ELECTRICAL.

MAGNET,PERMANENT

An object of various materials, that retains a magnetic field for an indefinite period of time after the magnetizing force has been removed. Excludes ELECTROMAGNET; magnetized hand tools; and compass needles.

ADAPTER,INDICATOR

An adapter which permits a remote indicator to be connected to an electronic set with which it was not normally intended to be used. Do not use if a more specific name exists. See also COUPLER (as modified).

CONTACT,ELECTRICAL

An item consisting of an electrically conductive material designed to furnish a surface which will physically and electrically meet another conducting surface for the purpose of transferring electrical energy and/or opening and closing circuits. Includes moving contacts which make and/or slide over stationary contacts or other stationary conductive material to a resulting fixed position. Excludes items which are used in conjunction with continually moving surfaces or which make contact by gripping action of the contact surfaces. See also CLIP, ELECTRICAL; CLAMP, ELECTRICAL; BRUSH, ELECTRICAL CONTACT; PLUG, TIP; and JACK, TIP.

RELAY-SWITCH

An item having the dual function of a RELAY (as modified) and a SWITCH (as modified) assembled together on a common mounting or in a single inclosure. Contacts may be common to both relay and switch. For relay operated switches, see RELAY (as modified). Excludes CIRCUIT BREAKER and relays with protruding shafts.

HARNESS,ELECTRICAL EQUIPMENT

An item consisting of adjustable straps, specifically designed for positioning and supporting electrical equipment. Excludes HARNESS, CATHODE RAY TUBE; HARNESS, CHEST SET; HARNESS, MICROPHONE; and WIRING HARNESS.

COVER,RELAY-SWITCH

CLIP,ELECTRICAL

A clip designed to electrically connect items and components. Its primary function is to make a quick and/or temporary electrical connection. Includes alligator and crocodile test clips, battery clips, contact clips, electron tube clips, resistor clips, or the like. For electron tube grid and plate cap clips with wire leads attached, see LEAD, ELECTRICAL. Excludes CLAMP, ELECTRICAL; CLIP, SPRING TENSION; and FUSEHOLDER (as modified).

CLAMP,ELECTRICAL

A clamp specifically designed to carry electric current. See also CLIP, ELECTRICAL; SPLICE, CONDUCTOR; TERMINAL, LUG; and RETAINER (as modified). Excludes BRACKET, PIPE.

RESONATOR,MAGNETOSTRICTION

A frequency control device, the operation of which is based on the magnetic and mechanical resonant properties of a ferromagnetic material, which has applications in oscillators and filters as a substitute for quartz crystals.

KEEPER,MAGNET

An item of low reluctance material placed between the poles of a magnet to retain the magnetic lines of force.

MAGNETOSTRICTION ELEMENT

An item of metallic material which changes in dimensions when placed in a magnetic field or which varies a magnetic field when pressure is applied. Excludes COIL (1) (as modified).

PLATE,ELECTRICAL SHIELD

A metallic or metallic coated item which is rigid or semirigid, flat, and generally smooth. Its thickness is small in comparison to both its length and width, and is designed to prevent or reduce stray electro-magnetic and/or electrostatic fields between components or items. It may be used as a mechanical guard. Excludes PLATE (as otherwise modified); SHIELD (as modified); and SPACER, PLATE.

POLE PIECE,MAGNET

A piece of magnetic material forming one end of a magnet which is so shaped as to control the magnetic flux in the adjacent medium.

HOLDER,CONTACT

CONTACT ASSEMBLY,ELECTRICAL

Two or more CONTACT, ELECTRICAL on a common mounting or mounted on each other. Excludes BRUSH SET, ELECTRICAL CONTACT; CONTACT SET (as modified); and INSERT, ELECTRICAL CONNECTOR.

DELAY LINE

An item which provides a predetermined delay to an electrical pulse, while maintaining substantially the same waveform. The delay is obtained by means of a real or artificial transmission line or equivalent device. The equivalent device may be acoustic, distributive, lumped constant, magnetic solid state, or surface acoustical wave type. See also ATTENUATOR, (as modified); TRANSFORMER, (as modified); and OSCILLATOR, PULSE DELAY.

LIGHT-SWITCH

An electrical device consisting of a Switch (1) and a light, not intended for illumination but present for the purpose of indication, on a common mounting, separable and capable of functioning individually; or one light and one switch fabricated as a common inseparable body incapable of functioning individually. It may include wall plate or box cover and it may be complete with a box. Excludes push, pull, push-pull, and toggle switches with a lamp mounted integrally in the actuator.

CONNECTOR-SWITCH

An electrical device consisting of one connector and one switch on a common mounting, seperable and capable of functioning individually or one connector and one switch fabricated as a common inseperable body, incapable of functioning individually. May include wall plate or box cover and may be complete with a box.

DUMMY CONNECTOR-SWITCH

An electrical device consisting of one dummy connector and one switch on a common mounting, separable and capable of functioning individually or one dummy connector and one switch fabricated as a common inseparable body, incapable of functioning individually. May include wall plate or box cover and may be complete with box.

RETAINER,ELECTRICAL SHIELD

An item specifically designed to position and restrain the movement of an electrical shield in relation to another item. Retainer must not be an integral part of the shield.

CAP,ELECTRICAL

A cap for use with electronic or electrical items. Excludes BOOT, DUST AND MOISTURE SEAL; CAP, IGNITION DISTRIBUTION; and COVER, ELECTRICAL CONNECTOR.

LIGHT-SWITCH ASSEMBLY

An electrical device consisting of a Switch (1) and two or more lights, or two or more switches and two or more lights, mounted on a common mounting. The lights are not intended for illumination but are present for the purpose of indication. Each item may be separable and capable of functioning individually, or the items may be fabricated into a common inseparable body, incapable of functioning individually. It may include wall plate or box cover and it may be complete with box. Excludes push, pull, push-pull, and toggle switches with a lamp mounted integrally in the actuator.

PARTS KIT,ELECTRONIC EQUIPMENT

Do not use if a more specific item name is applicable.

CASE,DELAY LINE

SHIELDING GASKET,ELECTRONIC

A shaped metallic item designed to increase the effectiveness of radio frequency/electromagnetic interference, or a nonmetallic item containing a wire mesh, metal, or other electrically conductive particles designed to provide environmental sealing and radio frequency/electromagnetic interference shielding. For bulk items see WIRE MESH, KNITTED or GASKETING MATERIAL, CONDUCTIVE.

WIRE MESH,KNITTED

A resilient knitted mesh consisting of a multiplicity of interlacing wire loops. It is manufactured in various cross-sectional shapes and may include fins. It includes items designed for mechanical and/or electronic use. Item may contain a resilient core or be impregnated with a resilient compound, such as rubber or plastic to provide for weather sealing. For items made by weaving and/or welding wires to form meshes, see WIRE FABRIC. For items shaped from this material, see SHIELDING GASKET, ELECTRONIC. Excludes BRAID, WIRE; WIRE CORD; and WEATHER STRIP.

CONNECTOR-SWITCH ASSEMBLY

A device consisting of two or more CONNECTOR, RECEPTACLE, ELECTRICAL and one or more SWITCH (as modified); or one or more CONNECTOR, RECEPTACLE and two or more SWITCH (as modified) mounted on a common mounting or upon each other. The connector(s) and switch(es) may be individually replaceable and capable of separate functions. May include one or more of the following: COVER, JUNCTION BOX; COVER, CONDUIT OUTLET; PLATE, WALL, ELECTRICAL; CONDUIT OUTLET; JUNCTION BOX and the like.

COOLER,AIR,ELECTRONIC EQUIPMENT

An item designed to circulate cool air for the purpose of maintaining electronic equipment at a rated operating temerature level. Excludes FAN (as modified) and COOLER, FLUID, ELECTRONIC EQUIPMENT.

DELAY LINE SET

A complete set utilizing delay lines and associated components to effect a predetermined time delay of a signal(s) for application to other components.

CONTACT KIT,ELECTRICAL

A group of items consisting of all the necessary elements required to fabricate a CONTACT, ELECTRICAL.

GASKETING MATERIAL,CONDUCTIVE

A nonmetallic material manufactured in various cross-sectional shapes, impregnated with electrically conductive particles. It is designed to provide environmental sealing and electromagnetic interference shielding to electrical and electronic equipment. For items shaped from this material, see SHIELDING GASKET, ELECTRONIC. See also WIRE MESH, KNITTED.

FILTER ELEMENT,FLUID

A replaceable device designed to remove solid particles from fluids ranging in density from heavy liquids to gases. The removal of particles is accomplished by porous material (metallic or non-metallic), stacked disks, wound wire, or the like, constructed so the fluid can flow through the device while the solid particles are retained. It may be designed to fit into a FILTER, FLUID (or similar cavity), or it may have an integral outer casing and mounting facilities and be designed to connect directly to an engine, compressor, or the like. The degree of removal of particles must be nominally rated at less than 50 microns or absolutely rated at less than 75 microns. Excludes FILTER ELEMENT, AIR CONDITIONING. See also STRAINER ELEMENT, SEDIMENT.

PANEL,RADIO FREQUENCY-ELECTROMAGNETIC INTERFERENCE SHIELDED,VENTILATING

A replaceable device in panel form designed to eliminate radio frequency and electromagnetic interference from the air passing through it. The elimination of interference is accomplished by reflection and/or absorption of radiated electromagnetic energy by media constructed of electrically conductive material, in honeycomb or louvered form confined in a frame, with electrically conductive gasketing (or self-gasketing feature) to provide electrical contact with the cabinet on which it is installed or mounted. It may be used in air ventilating or heating ducts, lighting aperture and the like. It may have a filter for dust protection. It may include a drip-proof design feature. Excludes electrical filtering devices which employ capacitor, resistor and coil components to eliminate or suppress conducted electromagnetic energy. Excludes SHIELD,TEST.

TAPE,SEMI-CONDUCTING,ELECTRICAL

A flexible item in roll form, six inches (152.4 mm) or less in width with a separator, designed to provide shielding continuation (elimination of Corona "noise") in electrical wire or cable splices/terminations. The item and/or the separator is printed with a legend identifying the item as semiconducting. Excludes: TAPE, ADHESIVE, RUBBER; TAPE, INSULATION, ELECTRICAL; TAPE, PRESSURE SENSITIVE ADHESIVE; and TAPE, SHIELDING, ELECTRICAL.

TAPE,SHIELDING,ELECTRICAL

A flexible item in roll form, six inches (152.4mm) or less in width, designed to provide radio frequency/electromagnetic shielding for an electrical cable, splice, microcircuit or other electronic component. It may be constructed from braided/knitted wire, metal foil, metallized plastic, or the like. It does not have printed data, symbols, or legends. Excludes TAPE, ADHESIVE, RUBBER; TAPE, INSULATION, ELECTRICAL; TAPE, PRESSURE SENSITIVE ADHESIVE; and TAPE, SEMI-CONDUCTING, ELECTRICAL.

PARTS KIT,HEAT SINK

DUMMY CONTACT,ELECTRICAL

An item designed to occupy the space of an electrical contact without having the electrical characteristics of an electrical contact. Excludes items designed for insertion into an electrical connector. See also PLUG, END SEAL, ELECTRICAL CONNECTOR and POLARIZING KEY, ELECTRICAL CONNECTOR.

CONTACT STRIP,PRINTED WIRING COMPONENT

An interconnecting device which provides high density electrical connection when pressure mounted between printed wiring components, miniature electronic components or between a printed wiring component and an electrical cable. The construction may consist of alternating layers of conductive and nonconductive material; parallel oriented wires imbedded in a nonconductive material or parallel oriented film conductors wrapped around a nonconductive core. For electrical connecting devices which contain contacts see ADAPTER (2), CONNECTOR; CONNECTOR, (as modified); DUMMY CONNECTOR, (as modified), and INSERT, ELECTRICAL CONNECTOR. Excludes CONTACT ASSEMBLY, ELECTRICAL; CONTACT, ELECTRICAL; CONTACT STRIP, RADIO FREQUENCY GROUNDING; and TERMINAL, (as modified).

KEYBOARD,DATA ENTRY

A device for data input by key depression which causes the generation of the selected character, numeral or the like.

INSTALLATION PAD,SOLUBLE,ELECTRICAL-ELECTRONIC COMPONENT

An item specifically designed to provide a temporary support to maintain spacing for an electrical/electronic component such as a semiconductor, relay, or resistor during installation into the next higher assembly. It is fabricated from material which can be dissolved after installation of the electrical/electronic component leaving no electrically conductive residue. For items designed to provide permanent support or spacing, see MOUNTING PAD, ELECTRICAL-ELECTRONIC COMPONENT.

STRIP,ELECTRICAL GROUNDING

A rigid or semirigid item of electrically conductive material designed to provide a connection between the piece(s) of equipment and ground. Its primary purpose is to dissipate static charges. Excludes TERMINAL STRIP, GROUNDING; CONTACT STRIP, RADIO FREQUENCY GROUNDING; and PLATE, ELECTRICAL GROUNDING.

SHIELD,ELECTRONIC COMPONENTS

An item specifically designed to be placed around a group of components in order to prevent or reduce electromagnetic, electrostatic or radio frequency interference. It may be of various materials and of any shape except flat. For flat items, see PLATE, ELECTRICAL SHIELD. Excludes COVER (as modified), CAP (as modified, and shields designed for single components.

CONTACT ASSORTMENT,ELECTRICAL

Two or more of the same or different types of CONTACT, ELECTRICAL grouped together in a single package and intended for individual replacement and wide selectivity range. May include labels, inserts and case.

HEAT SINK-INSULATOR

An item specifically designed to be thermally conductive and electrically insulating. For items designed to dissipate heat only, see HEAT SINK, ELECTRICAL-ELECTRONIC COMPONENT. For items designed to insulate only, see INSULATOR (1) (as modified).

CONTROL,MONITOR MODULE,ANTILOCK

OVEN,ELECTRICAL-ELECTRONIC COMPONENTS

An electrically heated compartment designed to accommodate and maintain at an essentially constant temperature, one or more components, such as, CRYSTAL UNIT(S), QUARTZ; tuned circuits; integrated circuit devices; and semiconductors. It prevents frequency drift and changes in teperature.

HEADER,SHORTING

An item which may consist of insulating material upon which one or more terminal(s) is shorted to other terminal(s). The item may/may not be programmed by breaking the connection between terminals. It is designed primarily to act as a shunt between two or more points in an electrical circuit. It is not designed to mate with another connection. For items that mate with another electrical connector, see DUMMY CONNECTOR, PLUG.

CHUTE,ARC

An item fabricated from electrically nonconductive material which is designed to be placed around one or more set(s) of electrical contacts to confine the current discharge and preventing it from jumping (arcing over) to a set of adjacent contacts. It may/may not include an electrically conductive device(s) to fragmentize and extingush the discharge in order to minimize contact pitting. It is a replacement part for a CIRCUIT BREAKER&#59; CONTACTOR, MAGNETIC&#59; RELAY (1), (as modified)&#59; SWITCH, (as modified) and/or similar items.

HOUSING,ELECTRONIC COMPONENTS

A housing specifically designed to surround or enclose, in addition to supporting and aligning electronic components classified in more than one class. It may provide mounting facilities for external and/or internal components and may be either single or miltiple piece construction.

COMPONENT PACKAGE,ELECTRONIC

A device which is designed to enclose a microcircuit die, resistor, capacitor, microwave, monolithic device or a combination thereof, but does not contain the component(s). For items which contain the circuit element(s) see MICROCIRCUIT (as modified); RESISTOR (as modified); CAPACITOR (as modified); or the like. Do not use if a more applicable item name exists.

COOLER,FLUID,ELECTRONIC EQUIPMENT

An item designed to circulate and cool a fluid for the purpose of maintaining the temperature of electronic components and/or equipment at a rated operating level.

ACCESSORY KIT,ELECTRONIC EQUIPMENT

An accessory kit designed to be used in conjunction with electronic end items for the purpose of enhancing or evaluating the capability of the items operation. This kit is not used to repair an item, nor does it permanently modify an item. Excludes REPAIR KIT (1), (as modified; PARTS KIT (1), ELECTRONIC EQUIPMENT; MAINTENANCE KIT (1), ELECTRONIC EQUIPMENT; ACCESSORY KIT ELECTRICAL-ELECTRONIC TEST EQUIPMENT.

MATCHED SET,ELECTRONIC COMPONENTS

A grouping of two or more different individual electronic devices, such as a diode and a resistor, transistor and capacitor, or the like. It includes components matched by specific electrical/mechanical characteristics. For a resistor and capacitor mounted on a common board that are inseperable, see CAPACITOR-RESISTOR.

DUCT ASSEMBLY,ELECTRONIC EQUIPMENT

A hollow body feeding cool air to different parts of electronic equipment. Flanges, brackets, adapters, etc. for mounting purposes can be included.

STRIP,SHORTING

An item specifically designed to facilitate the connection of two or more contacts or terminals within an electrical connector, on a terminal board, on a printed circuit board header or the like for the purpose of making them electrically common. Normally a solid item with holes to accommodate the contacts or terminals. Excludes DUMMY CONNECTOR, PLUG; DUMMY CONNECTOR, RECEPTACLE; LEAD, ELECTRICAL BUS, CONDUCTOR; and TERMINAL STRIP, GROUNDING. For items with studs or threaded holes to accommodate terminals or holes to accommodate wire for solder, or the like see TERMINAL BOARD. For items designed to carry heavy current see BUS, CONDUCTOR.

TERMINATION KIT,CABLE ASSEMBLY

A collection of items used to seal and/or protect electrical conductors by using the cold shrink method.

ELECTRONICS COMPONENTS SET

A grouping of two or more different individual electronic devices, such as a diode and a resistor, transistor and capacitor or the like. It can include components matched or not matched by specific electrical/mechanical characteristics. For a resistor and capacitor mounted at a common board that are inseparable see CAPACITOR-RESISTOR. Excludes ELECTRONIC COMPONENTS ASSEMBLY.

CONTACT CARTRIDGE,ELECTRICAL

An item used for adding to the basic relay and adder decks. It fits all relay locations, pneumatic time-delay attachments, and mechanical latch attachments.

MODIFICATION KIT,ELECTRICAL AND ELECTRONIC EQUIPMENT

An item or collection of items employed to modify electrical and electronic equipment.

HEATER,THERMAL RELEASE

A resistive element which dissipates sufficient heat to melt the fusible material or distort the bimetallic element of an overload protective device when the temperature, as a result of an overload in an electrical circuit, reaches a predetermined value. Excludes COIL (as modified); RESISTANCE ELEMENT; RESISTOR,THERMAL; THERMAL RELEASE,CIRCUIT BREAKER; and items with integral bimetallic element, contacts, or fusible material.

HEATER SET,THERMAL RELEASE

Two or more unassembled HEATER,THERMAL RELEASE for use in specific equipment and packaged or grouped for issue as a single unit.

HEAT SINK,ELECTRICAL-ELECTRONIC COMPONENT

An item which is specifically designed to absorb, conduct or dissipate heat generated by an electrical and/or electronic component or an external source in order to prevent damage to the component. Do not use if a more specific name applies.

MOUNTING PAD,ELECTRICAL-ELECTRONIC COMPONENT

An item fabricated from electrically nonconductive material specifically designed to provide a support for mounting an electrical and/or an electronic component such as a semiconductor device, relay, or resistor into the next higher assembly. It isolates the component from the mounting surface of the next higher assembly, it may act as a strain relief to avoid damage to the component seal, and it may permit soldering of the component to the next higher assembly without damage. It includes holes, notches, or other provisions for physical alignment and spacing of electrical leads and/or other mounting facilities projecting from the component it mounts. It may also afford protection from shock or vibration. It may be either nonthermally conductive which protects the component from temperature changes in the next higher assembly or it may be thermally conductive which permits heat generated in the component to be drained out to a heat sink. For items whose function is electrical insulation only, see INSULATOR, (as modified). Excludes HOLDER, (as modified); RETAINER, (as modified), and SPACER, PLATE.

DUMMY CIRCUIT CARD ASSEMBLY

An item designed to occupy the space of a CIRCUIT CARD ASSEMBLY. It does not have electrical characteristics.

COOLING UNIT,ELECTRONIC EQUIPMENT

A unit designed to generate and circulate cool air for the purpose of maintaining electronic equipment at a specific operating temperature. It includes a blower, power conditioner, air plenum, and power housing. It can include an elapsed time indicator to indicate the cumulative number of operating hours. The unit provides status and control via the power supply assembly. Excludes COOLER, AIR, ELECTRONIC EQUIPMENT; COOLER, FLUID, ELECTRONIC EQUIPMENT; and FAN (as modified).

RESERVOIR,COOLANT FLUID,ELECTRONIC EQUIPMENT

A container which is part of a COOLER, FLUID, ELECTRONIC EQUIPMENT. It is designed to collect excess coolant fluid when the fluid expands due to temperature rise.

FILTER ELEMENT SET,FLUID

A group of FILTER ELEMENT,FLUID having different characteristics.

CONNECTOR,ELECTRICAL,ROTARY

An item which consists of conductive elements such as BRUSH,ELECTRICAL CONTACT; RING,ELECTRICAL CONTACT, and the like, rotating or sliding relative to each other and ensuring a permanent connection of various forms of electrical energy between two or more components or assemblies. For radio freuency connections, see: COUPLER,ROTARY,RADIO FREQUENCY.

CONTROL-MONITORINGUNIT,ELECTRICAL-ELECTRONIC EQUIPMENT

An electronic unit designed to control and/or monitor in local or in a remote an electrical and/or electronic equipment. It may have various communication interfaces and be plug-in or rack mounted on a chasis, rack and the like.

REPAIR KIT,ELECTRONIC EQUIPMENT

A collection of spare parts and tools which do not all have the same basic name. The kit is designed to repair or replace worn or damaged parts on electronic equipment. For items including spare parts without tools see PARTS KIT (1) (as modified). Excludes MAINTENANCE KIT and INSTALLATION KIT (as modified). Do not use if a more specific item name is applicable.

COOLER,VAPOR-FLUID,ELECTRONIC EQUIPMENT

An item designed to circulate and cool a fluid where at least some of the fluid is intentionally transformed into vapor upon heating via a pumped two-phase system, resulting in a vapor-liquid mixture for the purpose of maintainthe temperature of electronic components and/or equipment at a rated operatoperat ion level. Excludes FAN (as modified); COOLER,AIR,ELECTRONIC EQUIPMENT and COOLER,FLUID,ELECTRONIC EQUIPMENT.

AMPLIFIER,TRIGGER PULSE

An electronic device whose input signals control power from a source independent of the input signals and delivers output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It is controlled by triggering pulses of electrical energy.

AMPLIFIER,VIDEO

An electronic device whose video frequency input signals control power from a source independent of the input signals, and delivers output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It is generally used in equipment in which the electrical impulses are converted into visual presentation by means of cathode ray tubes or other items.

AMPLIFIER,ELECTRONIC CONTROL

An electronic device which enables input signals to control a local source of power and deliver output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals, and are suitable for controlling or supplying power for exciting electric motors or similar devices. It includes devices commonly referred to as servo amplifiers, torque amplifiers and similar equipment only if these devices do not employ synchros nor incorporate servomechanisms. It does not include items which are properly classified as audio frequency, radio frequency, direct current or video amplifiers. For amplifiers that incorporate servomechanisms and employ synchros, see AMPLIFIER, SYNCHRO SIGNAL.

AMPLIFIER,RADIO FREQUENCY

An electronic device whose radio frequency input signals control power from a source independent of the input signals, and delivers radio frequency output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It operates at frequencies above 20 kilohertz.

AMPLIFIER,AUDIO FREQUENCY

An electronic device whose audio frequency input signals control power from a source independant of the input signal and delivers audio frequency output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It operates at frequencies of 20 kilohertzs and below. It may or may not have signal switching capabilities.

AMPLIFIER,INTERMEDIATE FREQUENCY

An electronic device whose input signals controls a local source of power and delivers an output signal of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It is tuned to a single fixed frequency which is the resultant of heterodyne action between a local oscillator frequency and a signal frequency introduced from an external source.

AMPLIFIER ASSEMBLY

Two or more independent amplifiers having a common mounting or mounted on each other.

AMPLIFIER,TRIGGER PULSE-VIDEO

An electronic device whose input signals control power from a source independent of the input signals and delivers output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It incorporates two or more channels of which at least one is controlled by triggering pulses of electrical energy, and another is for electrical impulses which are video frequency signals which are converted into visual presentations (pictures) by means of a cathode ray tube or other items.

AMPLIFIER,MAGNETIC

An item consisting of a saturable reactor which is specially designed to be used in conjunction with a rectifier(s) for amplification purposes. The rectifier(s) may or may not be an integral part of the item of supply. The item may include resistors, capacitors, and/or other electrical components.

AMPLIFIER SUBASSEMBLY

Two or more different types of items having a common mounting or mounted on each other which together form a portion of an amplifier but which in itself is not a complete functioning item and cannot be assigned a more definite item name.

AMPLIFIER,DIRECT CURRENT

An electronic device whose input signals control power from a source independent of the input signals and delivers output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It is used for small variations in direct current electrical impulses, and generally employs direct coupling between stages through resistors.

AMPLIFIER,AUDIO-RADIO FREQUENCY

An electronic device whose audio and radio frequency input signals control power from a source independent of the input signals and delivers audio and radio frequency output signals of greater amplitude with respect to current and/or voltage. The output signals characteristics are uniformly related to the input signals. It operates at frequencies above and below 20 kilohertz.

AMPLIFIER SET,MATCHED

A group of two or more individual amplifiers, as modified, which, when connected together, produce a specific gain.

AMPLIFIER,ACCELEROMETER SIGNAL

An amplifier which amplifies the input and/or output signal voltage(s) of an accelerometer. Excludes AMPLIFIER, ELECTRONIC CONTROL; and AMPLIFIER, SYNCHRO SIGNAL.

AMPLIFIER,MAGNETIC DRUM STORAGE DATA

An amplifier for electronic computor data being stored on or removed from a magnetic drum.

AMPLIFIER,PARAMETRIC

An item, the output characteristics of which are uniformly related to the input signal, but of greater amplitude with respect to current and/or voltage. It consists basically of an input signal inductance, an output signal inductance, and a semiconductor diode device. An external source of radio frequency power, commonly referred to as the "pump frequency" is injected across the diode at a frequency fundamentally or harmonically related to the input signal frequency. The diode, operating as a type of frequency-controlled capacitor, increases the amplitude of the input signal by an appreciable value, at an almost zero noise level. The characteristic of extremely low noise level at very high operating frequencies, makes the amplifier suitable for use with radar receivers, missile detection and tracking equipments, radio astronomy research, and the like. Excludes AMPLIFIER, RADIO FREQUENCY.

AMPLIFIER,SYNCHRO SIGNAL

A device designed to increase the capacity of a synchro transmission system and to isolate reflected oscillations from the input synchro signal. It includes a control transformer, an electronic or magnetic amplifier, a servomechanism and one or more synchro transmitters. May include synchro receiver(s). For amplifiers that do not include synchros and do not incorporate servomechanisms, see AMPLIFIER, ELECTRONIC CONTROL.

AMPLIFIER,DATA ACQUISITION SYSTEM

A specifically designed amplifier unit which amplifies low-level analog signals derived from a quantity of sources, such as strain gages, thermocouples, transducers, and the like, to useful levels for measurement, conditioning, monitoring, recording, indication, digital conversion, and the like. It may consist of single or multiple channels.

INSTALLATION KIT,ELECTRONIC EQUIPMENT

Items to include brackets, cables, and miscellaneous hardware used to provide a rapid installation and/or removal of electronic equipment, communication equipment and the like. For items consisting solely of assorted hand tools, see TOOL KIT (as modified). For items consisting solely of common and/or specially designed hardware specifically designed to secure electronic equipment, see HARDWARE KIT,ELECTRONIC EQUIPMENT.

ELECTRONIC COMPONENTS ASSEMBLY

A grouping of two or more different types of electrical/electronic components mounted on a common mounting. It may include an assembly of electrical/electronic components mounted on multiple PRINTED WIRING BOARD(S) mounted back to back, stacked, and the like. The item is generally a component of a subassembly and cannot be assigned a more definite item name. Excludes items which may be identified as a subassembly. For an assembly of electrical/electronic components mounted on a single PRINTED WIRING BOARD, see CIRCUIT CARD ASSEEMBLY. Do not use if a more specific name applies.

PATCHBOARD,ELECTRICAL

A single, flat surfaced item in which are incorporated jacks, clips, sockets, and the like, and which provides a point for convenient interconnections by use of patch cords with plugs, or other means of connecting between electrical circuits which may be used for programming, toubleshooting, and testing. Do not use if a more applicable item name exists. Excludes PANEL, PATCHING, ANTENNA; PANEL, PATCHING, COMMUNICATION; and SWITCHBOARD, PATCHING, COMMUNICATION. See also PANEL, PATCHING, PROGRAMMING.

HOLDER,PRINTED CIRCUIT BOARD

A holder designed to accommodate and position one or more printed circuit boards. It is usually an open frame structure with printed circuit board guides mounted between parallel support bars and end supports. It is designed to be mounted in electrical cabinets, cases, drawers and racks to provide mounting facilities for printed circuit boards. See also CABINET, ELECTRICAL EQUIPMENT; CASE (as modified); DRAWER, ELECTRICAL EQUIPMENT; and RACK, ELECTRICAL EQUIPMENT.

EXTRACTOR,ELECTRICAL CARD

A device specifically designed to remove CIRCUIT CARD ASSEMBLY; or PRINTED CIRCUIT BOARD from their installed position.

HOLDER,ELECTRICAL CARD

A device specifically designed to retain CIRCUIT CARD ASSEMBLY or PRINTED CIRCUIT BOARD in their installed position. Excludes, RETAINER-EJECTOR, ELECTRICAL CARD; and HOLDER, PRINTED CIRCUIT BOARD.

RETAINER-EJECTOR,ELECTRICAL CARD

A device having the dual function of providing restraint for, and facilitating the removal of CIRCUIT CARD ASSEMBLY; or PRINTED CIRCUIT BOARD. Excludes HOLDER, ELECTRICAL CARD.

SUPPORT,ELECTRICAL CARD HOLDER

An item designed specifically for holding and positioning the HOLDER, ELECTRICAL CARD.

BACKPLANE ASSEMBLY

An insulating panel upon which two or more CONNECTOR, RECEPTACLE, ELECTRICAL, are mounted, and completely processed electrical conductor paths are deposited, etched, or printed in various paths. It provides or completes a circuit between two or more CIRCUIT CARD ASSEMBLY or ELECTRONIC COMPONENTS ASSEMBLY. It may be designed for panel or chassis mounting, or for insertion into a CONNECTOR, RECEPTACLE, ELECTRICAL. Includes motherboards. For items containing processed electrical conductor paths and contacts for plug-in connecting facilities, see PRINTED WIRING BOARD. See also PRINTED CIRCUIT BOARD; CIRCUIT CARD ASSEMBLY and CABLE ASSEMBLY, PRINTED, FLEXIBLE.

SHEET,PRINTED WIRING BOARD

An electrically insulated item designed primarily to be used for the fabrication of a PRINTED WIRING BOARD or PRINTED CIRCUIT BOARD for electrical and electronic circuits. It may or may not be laminated or copper clad. For items with metal cladding the electrical conductor paths must be capable of being deposited, etched, or printed in various patterns. Excludes items having printed electronic components, such as capacitors, resistors, and the like. For items processed with electrical conductive paths deposited, etched, or printed in various patterns, see PRINTED WIRING BOARD.

STIFFENER,ELECTRICAL CARD

A rigid item mounted to a CIRCUIT CARD ASSEMBLY, PRINTED WIRING BOARD or like items. It is composed of various materials, has assorted dimensions, and is used to strengthen and/or reduce flexing of the card or board.

CIRCUIT CARD SET

A group of two or more circuit cards such as controller board, expander card and the like, not physically connected to each other. The item(s) may be used to expand memory, extend application, enhance the design or the like of a piece of equipment. For items designed to modify equipment, see also MODIFICATION KIT (as modified). For items physically connected together, see CIRCUIT CARD ASSEMBLY.

PRINTED CIRCUIT BOARD

A PRINTED WIRING BOARD having only printed electronic components, such as capacitors, resistors, and the like. For items having a complete individual electrical/electronic function, use applicable item name, such as AMPLIFIER (as modified); POWER SUPPLY; or the like. For items not having a complete individual electrical/electronic function, see applicable "SUBASSEMBLY" name, such as AMPLIFIER SUBASSEMBLY; POWER SUPPLY SUBASSEMBLY; or the like. For items having separately manufactured components (other than plug-in connecting facilities) and not having a more specific item name, see CIRCUIT CARD ASSEMBLY.

CIRCUIT CARD ASSEMBLY

A grouping of two or more physically connected or related electrical an/or electronic parts capable of dissassemblage. Each component of the assemblage must be capable of functioning in accordance with its own item name. Consists of a single PRINTED CIRCUIT BOARD or TERMINAL BOARD upon which are mounted separately manufactured electronic components such as capacitors, inductors, resistors, and the like. It may also include printed electronic components. The item is generally part of a subassembly and cannot be assigned a more definite item name. For items having a complete individual electrical/electronic function, use applicable item name such as AMPLIFIER (as modified); POWER SUPPLY; or the like. For items not having a complete individual electrical/electronic function, see applicable subassembly name, such as AMPLIFIER SUBASSEMBLY; POWER SUPPLY SUBASSEMBLY; or the like. For an assembly of electrical/electronic components mounted on other than a single PRINTED WIRING BOARD, see ELECTRONIC COMPONENTS ASSEMBLY. Excludes PRINTED CIRCUIT BOAR

PRINTED WIRING BOARD

An insulating panel upon which completely processed electrical conductor paths are deposited, etched, or printed in various patterns to provide or complete a circuit between two or more points. It may provide contacts for plug-in connecting facilities. It may be designed for panel or chassis mounting, or for insertion into a CONNECTOR, RECEPTACLE, ELECTRICAL. For items containing printed electronic components, see PRINTED CIRCUIT BOARD. For items containing separately manufactured electronic components, see CIRCUIT CARD ASSEMBLY. For items consisting only of electrical conductor paths and two or more connectors, see BACKPLANE ASSEMBLY.

EXTENDER CARD,ELECTRONIC TEST

An item consisting of a hand wired or printed wiring board, with or without a retaining plate, rails, brackets, or electrical connector(s) which is designed to provide access to a circuit card assembly or electronic components assembly for testing, test point checking and troubleshooting.

RETAINER-EJECTOR SET,ELECTRICAL CARD

A group of two or more RETAINER-EJECTOR, ELECTRICAL CARD having different sizes.

INTERFACE UNIT,INPUT-OUTPUT

An input or output modular device, electric and/or electronic which allows to link or connect actuators, sensors, or the like. It is generally associated with other modular systems such as power supplies or interface networks. It is managed by a master controller by bus or communication networks and a specific software. It is mounted on a Rail Guide and intergrated in a global automation system.

AIR TRAFFIC CONTROL SYSTEM

A system with interface capabilities that provides Air Traffic Control (ATC) functions for launch and recovery operations. It has capabilities for tracking and the display of fused primary and secondary radar target reports, geographic charts, maps, reference points and individual aircraft flight data information. The system also provides 24 hour all weather flight operations.

MANAGEMENT UNIT,ELECTRICAL-ELECTRONIC EQUIPMENT

An electronic unit in shape of a card, plate or other, designed to manage the operation of electrical and/or electronic equipment by logical and/or analogic information. It can control the different subassemblies and/or components of electrical and /or electronic systems. It can provide electrical distribution, processors, actuators, circuit breakers, etc. It can have various communication interfaces and be plug-in or rack mounted in a chassis, rack and the like.

CONTROL-MONITORINGUNIT,ELECTRICAL-ELECTRONIC EQUIPMENT

An electronic unit designed to control and/or monitor in local or in a remote an electrical and/or electronic equipment. It may have various communication interfaces and be plug-in or rack mounted on a chasis, rack and the like.

INSULATOR ASSEMBLY

Two or more insulators on a common mounting or mounted on each other. Do not use for single complete feedthru insulators (double bowl type) which are termed INSULATOR, FEEDTHRU regardless of complexity.

INSULATOR,PIN CAP

An insulator having an integral provision for rigidly assembling one upon the other for the purpose of extending its insulating range.

INSULATOR,STANDOFF

An insulator which is specifically designed to support a conductor or an item at a predetermined spacing from a mounting surface. It may include mounting and/or conducting hardware.

INSULATOR,STRAIN

An insulator specifically designed to transmit to the tower, or other support, the entire pull of a conductor or guy wire.

INSULATOR,SUSPENSION

An insulator having an integral provision for the nonrigid assembling of one upon the other for the purpose of extending its insulating range. It is specifically designed to suspend a conductor from a tower or other support.

INSULATION CLOTH,ELECTRICAL

A fabric of natural or synthetic fibers such as cotton, silk, rayon, glass, asbestos or nylon in widths of 12 inches (304.8 millimeters) or more, and which is specifically designed to prevent any undesirable flow of current between a conductor(s) and/or other objects. Excludes PLASTIC SHEET; and items which do not have definite rated electrical characteristics. See also INSULATION TAPE, ELECTRICAL.

INSULATION SHEET,ELECTRICAL

A material whose thickness is small in comparison to its length and width, and which is specifically designed to prevent any undesirable flow of current between a conductor(s) and/or other objects. Excludes items which do not have definite rated electrical characteristics. Excludes INSULATION CLOTH, ELECTRICAL; INSULATION TAPE, ELECTRICAL and PLASTIC SHEET. For electrical insulation sheets fabricated for a specific application, see INSULATOR (as modified).

INSULATION SLEEVING,ELECTRICAL

A rigid or flexible tubing having uniform inside and outside diameters in the overall length. It is specifically designed to prevent any undesirable flow of current between conductors and other objects. Includes shrinkable type tubing, items in bulk and in specific fabricated lengths (cut to size). Excludes items not having rated electrical characteristics. Also excludes BUSHING, SLEEVE; CABLE NIPPLE, ELECTRICAL; CONDUIT (as modified); INSULATION SLEEVING, ELECTRICAL, SPECIAL PURPOSE; INSULATION SLEEVING, THERMAL; SLEEVE, MARKER, CABLE; SLEEVING, TEXTILE, ELECTRICAL; TUBING, GLASS; and TUBING, NONMETALLIC.

INSULATOR,ELECTRICAL,COOLING

An item consisting of a coil of insulating tubing for the purpose of containing a column of liquid. This liquid is used to cool an element at a high electrical potential from ground (such as the plate of an electron tube or a high wattage resistor), and the column is of such length as to provide resistance sufficient to reduce the leakage of current between the element at high potential and the low-potential cooling system to a negligible value.

INSULATION ROD,ELECTRICAL

A solid material of natural occuring mineral mica, ceramic, or from material which has been electrically rated by government or industry standards or specifications, where the length is greater in proportion to its diameter or cross-sectional dimensions, and which is specifically designed to prevent any undesirable flow of current between conductors and/or objects. For items that do not have definite rated electrical characteristics, see NONMETALLIC ROD. For specific application, see INSULATOR (as modified).

INSULATION HOSE,ELECTRICAL CONDUCTOR

An item specifically designed to prevent any undesirable split along its axis for mounting on an exposed energized electrical conductor to provide a temporary insulating barrier between the electrical conductor and personnel in close proximity thereto.

INSULATION HOOD,INSULATOR

An item specifically designed to prevent any undesirable flow of current between conductors and/or other objects for mounting on an insulator and exposed energized electrical conductors to provide an insulating barrier between the items and personnel in close proximity thereto.

INSULATION BLANKET,ELECTRICAL

A flexible material specifically designed to prevent any undesirable flow of current between conductors and/or other objects for the purpose of covering exposed energized electrical items and to provide a temporary insulating barrier between the items and personnel in close proximity thereto. Excludes items of supply in rolls or bulk form.

ASBESTOS SHEET,COMPRESSED

A compressed sheet consisting of asbestos fiber uniformly mixed with a binder. It may be flat or in roll form. It is usually pliable and normally used as a gasket material. Sheets are limited to widths greater than 6 inches (152.4 mm). Excludes INSULATION BLANKET, THERMAL; INSULATION BLOCK, THERMAL; INSULATION BOARD, THERMAL; PAPER, ASBESTOS; and items designed for clutch and/or brake applications.

ASBESTOS SHEET,WOVEN

A woven sheet consisting of asbestos cloth usually impregnated with a filler compound. It may be flat orroll form and may also be interwoven with wire. It is normally pliable and is frequently used as a gasket material. Sheets are limited to widths greater than 6 inches (152.4 mm). Excludes CLOTH, ASBESTOS; INSULATION BLANKET, THERMAL; and items designed for clutch and/or brake applications.

MAT,FLOOR

A piece of floor covering of definite size and shape. It is made of a variety of materials. Does not include MATTING, FLOOR. Exclude: MAT, ELECTROSTATIC DISCHARGING

INSULATING VARNISH,ELECTRICAL

A liquid preparation which dries by evaporation and/or oxidation and is specifically compounded to provide electrical insulating characteristics. It may have other incidental values such as resistance to moisture, fungus, or the like. For items which are not specifically compounded to provide electrical insulating characteristics, use VARNISH, OIL or LACQUER. See also INSULATING COMPOUND, ELECTRICAL.

INSULATING COMPOUND,ELECTRICAL

A pre-mixed chemical composition which is specifically compounded to provide electrical insulating characteristics. The item includes such forms as liguids, paste, crystal, or solids which are designed to be melted or changed in configuration prior to usage, or when applied. For items with two or more separate chemical materials, see INSULATING COMPOUND KIT, ELECTRICAL. For items not specifically compounded to provide electrical insulating characteristics, see SEALING COMPOUND. Excludes INSULATING OIL, ELECTRICAL and INSULATING VARNISH, ELECTRICAL.

INSULATOR,CLEAT

An insulator of a generally rectangular shape which is designed to be attached to a rigid structure. It consists of two separate parts. For items of a generally cylindrical shape, see INSULATOR, KNOB.

INSULATOR,KNOB

An insulator of generally cylindrical shape which is designed to be attached to a rigid structure.

INSULATOR,FEEDTHRU

An insulator which is specifically designed to provide for the passage of electrical conductors through such items as panels, bulkheads, walls, and the like. It consists of two or more insulators, including one or more studs fed through the items in such a way as to be used as conductors. The studs may be used for mounting. See also INSULATOR, BOWL; and TERMINAL, FEEDTHRU, INSULATED.

INSULATOR,PIN

An insulator which is grooved for guiding purposes and which is specifically designed to be mounted on a crossarm pin or bracket pin.

INSULATOR,SPREADER

An insulator which is specifically designed to separate or hold apart free swinging electrical conductors.

INSULATOR,WASHER

An insulator that is essentially thin and flat, with one through hole centrally located. The general shape may vary by the addition of features such as beveled edges, indented surfaces, through hole keys, and/or peripheral flats. The thickness measured between the two parallel bearing surfaces must not exceed 25 percent of the outside diameter or the shortest distance between peripheral flats. The thickness measured between the two parallel bearing surfaces must not exceed 25 percent of the outside diameter or the shortest distance between peripheral flats. Excludes items with more than one hole. See also INSULATOR, DISK; INSULATOR, BEAD; INSULATOR, BUSHING; and INSULATOR, PLATE

INSULATOR,DISK

An insulator that is essentially thin, flat, and round in shape, with or without holes. The general shape may vary by the addition of such features as beveled edges, indented surfaces, through-hole key and/or peripheral flats. It may have one or more holes off center; if there are two or more holes, one may be centrally located. Excludes MOUNTING PAD, ELECTRICAL-ELECTRONIC COMPONENT.

INSULATOR,PLATE

An insulator having flat surfaces, with or without holes, whose thickness does not exceed 25 percent of its length or width, whichever is smaller, and whose shape is other than round. Excludes INSULATOR (1), SPACER; INSULATOR (1), WASHER; MOUNTING PAD, ELECTRICAL-ELECTRONIC COMPONENT; PLATE, ELECTRICAL SHIELD; and TERMINAL BOARD.

INSULATOR,BEAD

An insulator specifically designed to be used as a spacer in, or in conjunction with, such items as coaxial cables, transmission lines, brush shunts, test leads, high voltage lines and the like. Has an axial hole through which the wire passes and the length of which is considerably more than 25 percent of the largest diameter perpendicular to the hole. The external shapes may be variations of cylindrical and spherical shapes.

INSULATOR,BOWL

An insulator used for wire entering or feedthru purposes. May include mounting and/or conducting hardware. Includes replacement bowls for feedthru insulators. Characterized by one or more bowl or bell shaped insulator surfaces.

INSULATOR,BUSHING

An insulator designed to fit into and reduce the effective diameter of the hole(s). It may include mounting and/or conducting hardware. For flexible bushing-type insulators that are self-retaining and consist of two facing flanges separated by a neck, see GROMMET, NONMETALLIC. Also see SPACER, SLEEVE and BUSHING, SLEEVE. Excludes INSULATION SLEEVING, ELECTRICAL.

INSULATOR,ANGLE BRACKET

An insulator formed into a dihedral angle (generally a right angle) designed to position, align or support an item(s) in relation to another.

SLEEVING,TEXTILE,ELECTRICAL

A treated or untreated flexible tubing of natural or synthetic fibers such as cotton, silk, rayon, glass, or nylon, specifically designed to inclose a wire or cable but does not have a definite rated electrical characteristic. Includes items in bulk or in definite fabricated lengths. For items having definite rated electrical characteristics, see INSULATION SLEEVING, ELECTRICAL.

INSULATING COMPOUND KIT,ELECTRICAL

A collection of two or more separate chemical materials which, when mixed, forms an electrical insulating composition prior to usage, or when applied. It is usually composed of liquid, paste, crystal, or solid forms with curing agents, or the like. For pre-mixed electrical insulating items, see INSULATING COMPOUND, ELECTRICAL. For items not specifically compounded for electrical insulating, see SEALING COMPOUND. Excludes INSULATING OIL, ELECTRICAL and INSULATING VARNISH, ELECTRICAL.

TAPE,INSULATION,ELECTRICAL

A narrow strip of woven or processed material less than twelve inches (304.8 mm) in width. It is specifically designed to prevent any undesirable flow of current between conductors and other objects. The item tends to resist any physical change, in contrast to an insulating compound in tape form which will fuse under a specified heat or pressure. It may or may not have adhesive backing. Excludes items not having definite rated electrical characteristics, such as TAPE, ADHESIVE, RUBBER; TAPE, PRESSURE SENSITIVE ADHESIVE; TAPE, SEMI-CONDUCTING, ELECTRICAL; and TAPE, SHIELDING, ELECTRICAL. See also INSULATION CLOTH, ELECTRICAL and INSULATING COMPOUND, ELECTRICAL.

INSULATOR,SPACER

An insulator having flat surfaces, with or without holes, whose thickness exceeds 25 percent of its length or width, whichever is smaller, and whose shape is other than round. It is used to support and/or separate electrical conductors and components. Excludes INSULATOR (1), STANDOFF; INSULATOR (1), PLATE; and INSULATOR (1), SPREADER.

ADAPTER,INSULATOR

An item constructed to establish the necessary accommodations to connect two or more items, one or more being insulators, whose physical design and/or function will not normally warrant their connection.

INSERT,INSULATOR

An item designed to fit into an electrical insulator to form an integral liner or seat for positioning or holding another item.

REPAIR KIT,ELECTRICAL CABLE INSULATION

Consists of a box containing a group of items used to make an insulating bond around a cable after the cable has been spliced. Excludes items which employ heat to form a bond.

INSULATION SLEEVING,ELECTRICAL,SPECIAL PURPOSE

A rigid or flexible tubing having other than uniform fabricated shapes or forms. It is specifically designed to prevent any undesirable flow of current between conductors or between conductors and other objects. Includes shrinkable type items. Excludes items not having rated electrical characteristics. Also excludes BUSHING, SLEEVE; CABLE NIPPLE, ELECTRICAL; and INSULATION SLEEVING, ELECTRICAL.

INSULATION SLEEVING SET,ELECTRICAL

A collection of two or more INSULATION SLEEVING, ELECTRICAL of different characteristics such as length, diameter, and the like.