Abstract: The preferred embodiment of the cable disclosed includes seven groups of twisted-pairs, outlined in dashed lines in FIG. 1. Groups 12, 14, 17 and 19 have four pairs each, and groups 13, 16 and 18 have three pairs each. Six of the groups, namely 12, 13, 14, 16, 17 and 18 are referred to herein as the outer groups since they are collectively twisted and wound helically about the seventh group 19 which is centrally located throughout the length of the cable. Each of the groups of twisted pairs may be held together by a cable binder such as nylon yarn 22. The core thus formed is enclosed within a jacket 23, and the entire assembly is referred to in the art as a "honeycomb" structure. In accordance with the present invention, the twisted pairs of each of the six outer groups are insulated with a fluorinated ethylene-propylene copolymer (FEP) material such as, for example, Teflon.RTM., while the twisted pairs of the central group are insulated with a high density polyethylene (HDPE) material.

Abstract: A flexible, tough electrical insulation is described for use in electric motors, generators, hermetic motors, transformers, and other electrical devices. The insulation described herein includes a layer of a cyclohexylene dimethylene terephthalate polymer (PCT), or one or more copolymers thereof. The PCT layer can be used in a film or in a nonwoven mat form, by itself, or alternatively, as a component of a laminate. The insulation can take the form of an insulating tape, an insulating sheet, an electric motor slot liner, motor wedges, or as some other die-cut insulating component. The insulation and products protected by the insulation can be used in a broad range of service application temperatures.

Abstract: A reinforced coaxial cable for underground service is disclosed. The cable generally includes an elongate center conductor, a surrounding dielectric material such as a foamed polymer dielectric, an outer conductor, a first jacket, an intermediate protective layer, and a second jacket. A ripcord can be positioned longitudinally between the first jacket and the intermediate protective layer to facilitate removal of both the intermediate protective layer and the second jacket. A tracer, or other visible indicia, extends longitudinally along the outer surface of the second jacket to facilitate locating the underlying ripcord. The intermediate layer and the second jacket provide increased impact resistance, cut-through resistance, and compressive strength, as well as increased resistance to abrasion and other frictionally induced damage. In addition, the intermediate layer and second jacket can be readily removed to allow increased flexibility or connectorization of the cable.

Abstract: A flexible strip test cable is disclosed having an elongated flexible strip cable, a series of strip traces disposed lengthwise on the flexible strip cable and having electrical strip contacts near one end of the flexible strip cable, an extension cable integral with the flexible strip cable and having a width at one end greater than the width of the flexible strip cable, and a series of test traces on the extension cable having electrical test contacts near the end of the extension cable remote from the flexible strip cable. Each of the test traces is electrically connected to one of the strip traces, and the minimum distance between two test contacts is greater than the minimum distance between two strip contacts. The flexible strip test cable may have a tooling guide for aligning a cutting tool with the end of the flexible strip cable which is connected to the extension cable.

Abstract: A multi-stranded electrical conducting wire has conducting strands surrounded by an insulative jacket. The strands have serrations around the circumference thereof to inhibit slipping movement between adjacent strands. This is particularly advantageous when used with IDC contacts whereby the reduced slipping increases the contact pressure and therefore electrical conductivity of the connection, in particular for connections subject to vibration or thermal contraction and expansion movements.

Abstract: A housing (1) which gently holds at least one pressure sensitive connecting cable (4) and provides strain relief for the at least one pressure sensitive connecting cable has a housing wall portion (2) which has an opening (3) through which the at least one connecting cable (4) can be passed into the housing (1). The housing (1) has a holding comb (22) therein, which include an angle member (5) having tangs or projections (7). The tangs or projections (7) are loosely fitted into additional openings (8) formed in the housing wall portion (2). The holding comb (22) also has tines (10) for respectively securing one of the connecting cables (4) using a heat shrinkable tube (11) to a respective one of the tines (10).

Abstract: An engine ignition cable includes a stretching resistant central core over which an intermediate layer made of a mixture of silicone with ferric oxide powders with a ratio of 4:1 is fit. A high conductivity wire is then wrapped around the intermediate layer, preferably in a helix form, to provide a low impedance current path having an impedance of 0.8 k.OMEGA. per meter length. An insulation outer layer or sheath which may be made of silicone or rubber, is then used to enclose the cable. The use of the high conductivity wire causes a strong electro-magnetic radiation when in operation which can be counteracted, at least partially, by the magnetic field established by the intermediate layer that consists of ferric oxide powders.

Abstract: A metal tube is formed from a metal tape. The metal tape is rounded to be abutted at the both side edges, and the edge-abutted portion is welded to provide a butt-welded seam. The metal tube includes an inner iron base layer, a chrome layer provided on the base layer, and an outer chrome oxide layer provided on the chrome layer. The chrome oxide layer is preferably toughened at the outer surface to provide an appropriate frictional resistance relative to forming tools.

Abstract: A ground strap and ground wire assembly for high voltage electrical connection and termination devices includes a braided copper strap and solid copper wire connected to each other by brazing or soldering rather than the conventional compression connector.

Abstract: An apparatus and method for connecting the end portions of electric wires to each other prevents the generation of a respiratory action in the connected end portions of the electric wires and thereby improves connection quality and connection working performance, and reduces the size of the connected portions. Insulating coatings of the end portions of electric wires are removed to provide exposed conductors. The exposed conductors are collected and integrated into a collective conductor and a tapered insulating cap having an opening at one of its ends is fitted over the collective conductor with portions of the insulating coatings adjoining the collective conductor.

Abstract: A compression connector accommodates an electrical conductor for crimping connection therein. The connector includes a connector body having a nest defined by a bottom wall and an opposed pair of upstanding sidewalls. The sidewalls are inwardly deformable upon application of a crimping force. A non-bendable die engagement extent is attached to the sidewall by a weakened portion thereof. Upon application of a crimping force the die engagement extent is cause to deform prior to the deformation of the other sidewall. This permits the sidewalls to overlap around the conductor during crimping.

Abstract: An effective grounding of electrical equipment, electrical cables, housings, and the like, is accomplished by grounding lugs that are initially formed as an integral part, for example, of a grounding sleeve of electrically conducting material that surrounds a protective cable casing of electrically conducting material in a crimping manner. The lugs are only bent out of the sleeve when needed. A grounding conductor is then secured to the lug. The grounding lugs may be incorporated in all systems that are provided for protection against surge currents or excessive voltages produced by a thunderstorm, especially in a vehicle or a craft, e.g. an aircraft. A cable connector includes a hollow support body that reaches with an inner end into the grounding sleeve to provide a backing for holding an end of the cable casing clamped between the grounding sleeve and the inner end of the support body. The outer end of the support body carries a coupling nut.

Abstract: A communication cable includes one or more first twisted pairs of electrical conductors, each electrical conductor being surrounded by a layer of a first plenum rated insulating material. The cable also includes one or more second twisted pair of electrical conductors, each electrical conductor thereof being surrounded by a layer of a second plenum rated insulating material. The first and second plenum rated insulating materials are different.

Abstract: Prefabricated electrical trunking made up of butt-jointed unit enclosure sections. A mechanical coupling is provided by use of flanges clamped by bolts passing through tubular spacers inside the enclosure sections. The spacers include openings receiving in a watertight manner swaged portions of orifices formed in the enclosure sections. A unit conductor assembly is housed in the coupling.

Abstract: The present invention features a high-voltage, high-temperature cable article for use with electric motors, coils, transformers, generators and power supplies. The cable article has a conductive core member overlaid with an intermediate, semiconductive layer and an outer, insulative jacket layer. The intermediate, semiconductive layer can be a carbon-impregnated polymer such as a carbon-impregnated polyethylene; a carbon-impregnated, ethylene-propylene-diene terpolymer (EPDM); semiconductive nylon tape; semiconductive PTFE (polytetrafluoroethylene) tape; semiconductive fabric tape; or a semiconductive extruded fluorocarbon. The temperature rating of the cable article is at least approximately 150.degree. C.; the voltage rating can be in a range of approximately between 1,000 to 15,000 volts. The wall thickness of the semiconductive layer can range from approximately 2 to 20 mils. The outer, insulative jacket layer can be a cross-linked polyolefin, an elastomeric or a thermoplastic elastomer material.

Abstract: The present invention relates to a method of thermally and mechanically protecting cables and bundles of cables by use of a sheath braided directly around the element to be protected using a braiding yarn constituted by a plurality of elementary strands formed by interlacing synthetic fibers obtained after cracking and spinning an aramid fiber and a carbonizable oxidized organic fiber. The carbonizable oxidized organic fiber constitutes the major portion of the synthetic fibers making up the elementary strand for the braiding yarn. The invention also provides a thermal and mechanical protective sheath for cables and bundles of cables obtained by the method. In order to improve certain mechanical or thermal characteristics of the sheath, it may be associated with a material made of a fiber additional to said two synthetic fibers, in order to form the elementary strand, or indeed the sheath braided in this way may itself be covered in additional braiding based on aramid fibers.

Abstract: A molded cable comprises a plurality of conductors and a webbed conductor harness. The webbed harness has openings formed by intersecting strands, the strands including channels therethrough for the conductors. The webbed harness can be made in combination with the conductors or with a preform to form the channels. The preform can then be replaced by the conductors to form the molded cabling.

Abstract: A waterproof protective cover includes an upper casing member having bores formed at both endwalls in a longitudinal direction thereof to pass the electrical wires therethrough and a lower casing member pivotably connected to the upper casing member through a hinge attached to each sidewall of the upper and lower casing members. The lower casing member also has bores formed at both endwalls in a longitudinal direction thereof to pass the electrical wires therethrough. A storage chamber is defined by the upper and lower casing members when the former is engaged with the latter. Being filled up with an insulating sealant, the chamber serves to accommodate a connection part of the connected wires. A reservoir chamber for receiving the insulating sealant flowing out of the storage chamber is arranged between the bores of the upper and lower casing members and the storage chamber. Further, the upper casing member has a seal plate formed on a sidewall thereof.

Abstract: A coupling device for prefabricated electrical trunking. An internal member fits inside enclosure sections of the trunking which are to be butt-jointed. The internal member has water drainage grooves on its outer surface near a mating plane of the butt-joint. An exterior member fits over the joints and its two halves are bolted together.

Abstract: A lightweight hose assembly (10) of the type adapted for conveying fuels and other corrosive fluids. The assembly (10) includes a tubular inner liner (12) comprising a polymeric fluorocarbon material resistant to chemical and heat degradation, and is characterized by including an outer liner (14) comprising an expanded polyamide material disposed about the inner liner (12). The assembly (10) further includes a conductive strip (30) formed along the inner liner (12) for dissipating electrical charges accumulating along the inner liner (12).