Abstract: There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90° to block the magnetic field component of the lightning discharge.

Abstract: A flexible coaxial cable includes a shield formed by at least one metal tape provided with a metal coating and wound helically around the insulated core of the cable. The shield is sealed to itself in leakproof manner by the coating which is melted so as to bond directly together the overlapping turns of a single tape or the overlapping turns of two superposed tapes by subjecting the cable provided with the shield to peripheral induction heating.

Abstract: A twisted and compressed conductor including a central wire and a plurality of conductor wires concentrically twisted around the central wire, wherein the central wire is at least one high-strength wire made of a fiber-reinforced metal matrix composite.

Abstract: An electrical power cable is provided, including an elongated carrier in the form of a soft center material hollow conduit. First and second insulated power conductors are spiraled about the conduit, with the first power conductor being spiraled in one direction, and the second power conductor being spiraled in the opposite direction. Preferably, the first and second power conductors cross one another at approximately a 90° angle. When the conductors are energized under load so that current flows through the power conductors, the magnetic field associated with the cable is reduced due to a cancellation effect because the power conductors are spiraled in opposite directions.

Abstract: The present invention realizes an increase of the capacity of a power transmission wire without replacing an already strung aerial power transmission wire. For this purpose, a braided heat conducting wire heat dissipating belt (1) treated to blacken its surface so that a surface heat dissipation rate becomes 0.7 or more or a surface-blackened heat dissipating spiral rod is wound around an outer circumference of an already strung aerial line (2) or jumper (8) so as to increase the heat dissipation effect of the surface of the aerial line (2). Heat dissipation enables the capacity of a permissible power supply of the already existing aerial line (2) to be increased. Further, the braided heat conducting wire heat dissipating belt (1) shares the transmission function and lowers the wind noise.

Abstract: The flexible coaxial cable comprises a shield formed by at least one metal tape provided with a metal coating and wound helically around the insulated core of the cable. The shield is sealed to itself in leakproof manner by said coating which is melted so as to bond directly together the overlapping turns of a single tape or the overlapping turns of two superposed tapes by subjecting the cable provided with said shield to peripheral induction heating.

Abstract: There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90° to block the magnetic field component of the lightning discharge.

Abstract: An electrical cable for high-voltage circuits is used in fixed type apparatuses such as office or home appliances. The electrical cable includes a tubular core portion formed of fluorine rubber and a magnetic material mixed therewith. The tubular core portion is wound with a conductive wire. The diameter of the conductive wire is set to be about 40 &mgr;m at the most, so that number of spirals can be more than about 10,000 spirals/m. Under these conditions, even when the electrical cable is flexed, spirals of the conductive wire are prevented from being superposed or stacked. The electrical cable can thus be provided with a high impedance and prevented from noise penetration.

Abstract: An electrical cable according to the present invention is suitable for high-voltage circuits used in fixed-type apparatuses such as office or home appliances. The cable includes a reinforcing thread, which is baked with a fluorocarbon rubber paint, to form a small-diameter cable core portion. The cable core portion is wound with a conductive wire having a wire core portion and a semi-electroconductive wire-coating. Because the conductive wire includes the semi-electroconductive coating, it can be wound densely. As a result, the electrical cable as a whole can be made thinner, while maintaining a high noise-suppressing effect.

Abstract: There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also spiraled wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90.degree. to block the magnetic field component of the lightning discharge.

Abstract: A high-speed cable includes first and second coaxial conductor sets which are disposed in mirror image fashion within a carbon-impregnated polymer jacket. Each coaxial conductor set includes a wire core surrounded by a dielectric layer and a ground conductor disposed along side the dielectric layer. The wire core, the dielectric layer and the ground conductor are themselves surrounded by a conductive shield layer. In addition to assisting in bleeding off accumulated electric charge, the polymer jacket also preserves conductor set alignment and planarity especially following handling, cutting, trimming and stripping operations. The cable is excellent for high-speed applications, is easily routed and preserves its electrical properties under various field conditions.

Abstract: A high frequency coaxial cable (1) contains a concentric internal conductor (3), a cylindrical insulating layer (7) surrounding the internal conductor (3) and made of a foamed plastic containing more than 50% by volume of air, a tubular external conductor (9) placed over the insulating layer (7), and an outer sheath (11). Cutouts (15, 15') are made in the insulating layer (7) by removing insulation material starting at the periphery (13) of the insulating layer and extending radially inward. These cutouts (15, 15') make it possible to increase the dielectric properties of the insulating layer between internal conductor (3) and external conductor (9).

Abstract: A helical resiliently extensible and retractable multiconductor coil cord including a plurality of conductor components enclosed within an outer jacket. One of the conductor components includes a metallic conductor centrally disposed within and surrounded by a first dielectric material which in turn is centrally disposed within and surrounded by a metallic shield covered by an inner jacket. The other conductor components each include a metallic conductor covered by a second dielectric material. In one embodiment the metallic shield includes a plurality of sets of wires helically wrapped around the dielectric material in mutually opposing directions, at least one of the sets of wires being wrapped around the dielectric material at an angle of less than about 20 degrees with respect to the axis of the conductor.

Abstract: There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also spiraled wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90.degree. to block the magnetic field component of the lightning discharge.

Abstract: A coaxial heating cable comprising a central electrically conductive heating core is formed from a conductor having a resistance with a positive temperature coefficient of at least 30% at 20.degree. C. An electrically insulating polytetrafluoroethylene sheath surrounds the core, and an outer electrically conductive ground shield encloses the sheath. The ground shield comprises a number of contiguous strands which are helically wound in a single layer around the sheath. The cable preferably has a maximum diameter of 1 mm and the conductive core conveniently has a resistivity of between 0.4 ohmsm.sup.-1 and 2 ohmsm.sup.-1. The heating cable may be used in under-carpet heating. The invention extends to a method of forming a coaxial heating cable.

Abstract: A multiple wire electric cable (10) having a plurality of conductive wires (12), each formed of a multifilament tensile core (14) of unbonded aramid fibers (16). Said conductive wires (12) further having at least a pair of tinsel conductor ribbons (18, 20), spirally wrapped in the same direction about tensile core (14). Further, each of conductor wires (12) arranged in an orientation wherein the spiral wraps of conductor tinsel in each conductor wire (12) are in alternating directions from one conductive wire to the next.

Abstract: A shielded cable having in the core of the cable a plurality of conductors, a lateral shield having overlapping longitudinal ends surrounding the cable core. The shield has a thickness of up to about 6 mils. A helical groove formed in the shield, and an insulating jacket surrounding the shield.

Abstract: An electric power cable is provided having concentric neutral wires (CN wires) applied helically over the cable core construction to serve as a metallic ground shield and having a protective polymeric jacket over the CN wires. The cable is characterized in that at least one continuous, elongated water swellable element, such as yarn, filament, strand or strip is provided in contact with the CN wires and is so disposed in relation thereto as to block the passage of water within the cable in the longitudinal direction.

Abstract: A twin axial or parallel pair cable for high data rate differential signal transmission with extremely low skew. The cable has first and second plated electrical conductors which extend in substantially parallel relation to one another. Preferably the conductors are surrounded by first and second foamed fluoropolymer insulating dielectrics, respectively. The dielectrics and the conductors are surrounded by a braided metal shield of plated electrical conductors. The dielectrics insulate the conductors from each other and from the shield, and are sufficiently crush resistant to maintain the conductors in substantially parallel relation to one another over the length of the cable. The shield may be covered with an optional jacket.

Abstract: The coaxial cable of the present invention is an insulating layer, an outer conducting layer and a protective film layer formed in that order around a center conductor, the outer conducting layer being formed from a primary transverse winding and a secondary transverse winding, each of a plurality of thin metal wires, the winding directions of the transverse windings being opposite each other. The winding angle of the primary and secondary transverse windings with respect to the center conductor is 30.degree..+-.5.degree. and the winding pitches of the primary and secondary transverse windings are from 0.8 to 2.0 times the bending radius of the coaxial cable.

Abstract: An electrically conductive ribbon is wound into contact with the screen of each of a plurality of individual conductors in a multicore cable and is passed through a continuous boundary aperture in the tubular body portion of a backshell which is rotated to wind the ribbon about the cable until the ribbon tightly fills the space between the ribbon wound portion of the cable and the internal surface of the body portion to anchor the cable to the tubular body portion. The free end of the ribbon is then severed substantially flush with the external surface of the tubular body portion.

Abstract: An improved aluminum alloy armoured cable wrap has been produced which permits the use of less aluminum alloy in the cable wrap thereby achieving lighter construction, while meeting or exceeding strength and flexibility requirements. The armoured cable wrap is made from aluminum alloy strip material formed of an aluminum alloy containing about 2.8-3.5 percent by weight Mg, about 0.25-0.70 percent by weight Mn and about 0.15-0.35 percent by weight Cr. Up to 0.5 percent by weight of Cu may also be added. The strip material is heat treated preferably to an Ultimate Tensile Strength of at least 265 MPa.

Abstract: A low attenuation coaxial cable for carrying microwave energy at GigaHertz frequencies includes a center conductor, dielectric surrounding the center conductor and an outer conductor encircling the dielectric. This outer conductor is formed by a plurality of longitudinally extending conductive wire strands positioned adjacent one to another with a slight helical lay along the cable. Internal ruggedization includes a bedding layer of indentable dielectric material encircling the outer conductor with a single-layer ruggedizing winding of strong wire sufficiently tightly wound around the bedding layer for partially indenting this strong wire into the bedding layer. A protective outer jacket of tough plastic material surrounds the ruggedization layer. The helical lay of strong wire in the ruggedization layer is opposite to the slight helical lay of wire strands of the outer conductor.

Abstract: A multiple conductor electric cable (10) having a plurality of conductors (12), each formed of a multi-filament tensile core (14) of unbonded aramid fibers (16). The conductors (12) further have at least a pair of tinsel conductor ribbons (18, 20), spirally wrapped in the same direction about tensile core (14). Further, conductors (12) are arranged in an orientation wherein the spiral wraps of conductor tinsel in each conductor (12) are in alternating directions from one conductor (12) to the next within a thermoplastic insulating jacket (22), which is further encased within polyester jacket (26).

Abstract: A magnetic field and electric field shield having an electrically conductive layer and two layers of thin, soft magnetic material wrapped in opposite directions about a common axis. One layer of magnetic material is wrapped in a clockwise direction and the other layer of magnetic material is wrapped in the counter clockwise direction. The electrically conductive layer is grounded and provides a barrier to electric field penetration. The two layers of magnetic material oppositely wrapped provide a barrier to magnetic field penetration. An outer wrapping of material may be used to secure the magnetic wrappings in place. The shield is applicable to electric devices, in particular electrical wires and cables for automotive vehicles and other high current discharge operations.

Abstract: A ground connector for grounding a small diameter cable enclosed by an exposed shield employs a collapsible tube formed by a strip of material wound in a spiral shape. A braided connector engages the shield and connects with a ground lead. An elastomeric covering biases the braided connector against the shield. The connector is forced against the shield when a pull-out force is applied to the strip.

Abstract: A flexible shielded cable (20). The cable includes an elongate flexible metal conductor (24) and a layer of a flexible dielectric material (26) disposed about the conductor. The cable has a flexible metallic shield (28) positioned about the dielectric material with the shield including a copper foil (30) having overlapping edges (36) and a copper, spirally served shield (32) about the foil. A layer of metal bonds together the overlapping edges, bonds the spirally served shield and the foil and closes the openings of the spirally served shield. A method of forming a metallic shield is also disclosed.

Abstract: A shielded electric signal cable having at least two semiconductive jacket layers of the same or differing conductivity to cover pinholes, meet variable electrical resistance specifications, and decrease signal transfer from jacket to shield.

Abstract: A cable for data transmission comprising a core comprising at least one energy transmission line; a jacket enclosing the core; armor strands wound around the jacket; and an embedding elastic structure, surrounding the jacket and designed to receive the armor strands. The cable may be manufactured as follows: (1) surrounding the core with a jacket; (2) surrounding the jacket with an embedding layer of curable but non cured thermosetting material; (3) enclosing the thermosetting layer with helically wound armor strands, in such a way that complementary grooves are generated in the embedding layer; and (4) subjecting the cable to heat in order to cure the thermosetting material of the embedding structure.

Abstract: An electro-mechanical cable for use in cable deployed pumping systems includes a containment layer surrounding a cable core and constructed to restrain outward radial expansion of the core while permitting longitudinal expansion.

Abstract: A crush, kink, and torque resistant, flexible coaxial cable having a closely spaced, spiralled rigid metal wire layer between the outer conductor of the coaxial transmission line and the outer jacket of the cable. Small size light weight, good flexibility with minimum spring-back and excellent crush resistance are provided together with excellent kinking, and torque resistance. This eliminates the need for external ruggedization to protect the electrical properties of the cable.

Abstract: A magnetic wave shield tape comprises a strip-shaped conductive member and a strip-shaped insulative member, the strip-shaped magnetic member being fixed to and overlapping the strip-shaped insulative member in the width direction.

Abstract: A water impervious cable construction for aerial, underground, or underwater use which includes at least one central electrical conductor, an overlayer of insulation material such as a plastic, a shield layer formed of a plurality of individual conductors (or the equivalent) which may be spirally wrapped and which shield layer is embedded in a layer of semiconducting material (which may also be a plastic), a layer of overlapped moisture barrier metal foil material, and a further overlayer of insulating material. The cable is manufactured on a substantially conventional cable extrusion line in which the partially manufactured cable (insulated core or cores wrapped with the shield conductors) is introduced into an extruder and a layer of semiconducting material is extruded thereon, wrapped with metal foil tape (which may include an edge located sealant), and introduced into a subsequent extruder to form one or more outer coatings.

Abstract: The invention relates to an electric cable comprising a braid which consists of crossed metallic braiding elements and surrounds the cable core, in which braided non-metallic elements of a high tensile strength are braided. Improved values for resistance to interference radiation and damping are obtained in that the metallic braiding elements and the non-metallic elements are arranged radially one over the other in parallel.

Abstract: An electric cable with spirally wrapped wires and wire-retaining strips thereon. The cable includes an insulated electrical conductor, an extruded semiconductive insulation shield overlying the insulated electrical conductor, a plurality of strips extruded and fused onto the insulation shield, and a plurality of wires wrapped around the insulation shield and the strips with sufficient tension to partially embed them into the strips to retain them therein and resist slippage. This arrangement also permits the selection of a first material having predetermined properties for the insulation shield and a second material for the strips having different properties from the first material composing the insulation shield. In one embodiment, the material selected for the strips has a higher softening or melting point than the softening or melting point of the material selected for the insulation shield.

Abstract: A class of torsionally-balanced submarine cables is disclosed which are highly coilable without exhibiting the undesirable tendencies of looping and kinking of its predecessors. Coilability is achieved in part by controlling the cable's torsional stiffness to bending stiffness ratio. Use of glass-reinforced polyester tape between and over the armor wires facilitates movement of the armor wire during coiling. The teachings of the present invention apply to cables experiencing strains in the elastic range.

Abstract: A multicore coaxial cable includes a conductor layer, an insulator layer surrounding the conductor layer, plastic tape surrounding the insulator and a metal shield surrounding the plastic tape. The exterior surface of the plastic tape is coated with a metal layer to contact the metal shield to reduce the electrostatic noises in the cable.

Abstract: A method for the manufacture of a high tension ignition cable wherein a tension member is passed through an extruder to form a settable plastic layer thereon. This extrusion takes place under conditions such that substantially no setting of the plastic layer occurs. Thereafter, winding a resistive conductor around the plastic layer to form a plurality of coils at least partially embedded in the layer. The coils are then coated with an insulation layer and a plastic layer is caused to set, thereby fixing the coils in position so that they do not move. The cable made by the foregoing process is also described.

Abstract: A yieldably extensible, self-retracting cable comprises a flexible center conductor surrounded by a primary dielectric material with a flexible wire shield exterior thereof and a thermoplastic or thermosetting elastomeric outer jacket formed permanently in a helical shape. The primary dielectric insulation comprises materials such as polymeric fluorocarbon or irradiated polyethylene having an exceptionally low dielectric constant. The low dielectric constant is maintained despite the permanently coiled configuration of the cable by ensuring that the plasticizing or curing temperature of the jacket is less than the melting or other degradation temperature of the dielectric material, and by utilizing unbraided wire shielding comprising a pair of concentric layers of wire wound helically in mutually-opposite directions to avoid mechanical injury of the dielectric material.

Abstract: A coaxial cable having a tape with a metal deposited thereon which is wound over a laterally wound shielding layer which is, in turn, formed over an insulation layer about the conductor. The tape includes a plastic tape and a metal layer deposited on the plastic tape, and the tape is disposed such that the metal layer is in contact with the laterally wound shielding layer. Improved high frequency shielding characteristics are obtained using this structure without sacrificing cable flexibility.

Abstract: An electrical cable with a core comprising an electrical conductor surrounded by insulation and with both a screen of wires in open helix configuration on the core and at least one other wire extending longitudinally of the core and electrically contacting the wires of the screen. An insulating sheath surrounds the screen and may itself embed the wires or it may surround a layer of extruded material which at least partially embeds the wires. The material of the layer may be insulating or semi-conductive. Also, a process for manufacturing such cable.

Abstract: A flexing connector for suppressing electromagnetic radiation from an electrical cable connecting moving and stationary elements of a machine has a shield surrounding a signal cable which includes an inner coil of wire wound in a generally helicoidal form with a flat cross-section with the signal cable positioned within the coil. An outer coil similar to the first, but with somewhat larger cross-section and wound with a different chirality, surrounds the inner coil. The coils are made from hardened steel, which is both electrically conductive and ferromagnetic. The two coils and the cable are clamped together on either side of a moving loop extending between the moving and stationary elements so that the coils cannot elongate and spread their windings apart as the connector is flexed.

Abstract: An elongated cable structure of rigid and flat transverse cross-section for protecting conduits of various types includes interior axial lines of high tensile strength which may be used to suspend equipment from one cable end and to force the equipment axially past obstructions in a well hole. The structure may be raised and lowered in the well hole by means of exterior teeth which are firmly secured to the underlying tensile lines project from the surface of the structure to mesh with traction drives.

Abstract: A method of producing a shielding for a flexible electric line employs at least one conductor having insulation upon which is wound at least one metal tape, the tape being separated into individual elements by cutting immediately before contacting the insulation.

Abstract: An improved flexible shielded electrical coaxial cable is provided having a shielding layer surrounding a core line, wherein the shielding layer comprises a plurality of metal wires helically overwrapped about the core line, adjacent wraps being in close contact, wherein the improvement comprises at least one strip interwoven in a stitching manner among the metal wires of the shielding layer. The strip is preferably a strip of expanded, porous polytetrafluoroethylene. The cable is highly flexible and useful in robots, for example.

Abstract: A coaxial cable assembly including a coil supported braid structure is disclosed. The cable exhibits excellent mechanical strength while preserving the desirable features of flexibility and ease of installation.

Abstract: A gas-tight and moisture-tight, mechanically strong signal transmission cable having a cable core and a cable sheath which comprises a metal tape folded around the core and having a minimum thickness of 100 .mu.m, a layer of polyethylene adhering to the tape, a layer of polyamide-11 or polyamide-12, an armoring of reinforcing wires or tapes, and a synthetic resin outer sheath.

Abstract: A novel suspended tilt switch method and apparatus for use in transporting bulk material and including a switch assembly having a plurality of parallel connected, position sensitive switch elements mounted in a predetermined configuration to provide normally open operation with actuation of the tilt switch by closing of the contacts of at least one switch element upon tilting of the switch structure in any direction from vertical to a predetermined actuation angle, and further a novel unitary tilt switch hanger which encases the electrical conductors extending from the switch to protect the conductors continuously from the switch to the connected controller.

Abstract: Armored submarine power cables are designed for laying in waters with varying depths. The cable has an armor which is heavy and strong (steel wires) in shallow water sections. In very deep waters the weight of steel armor is prohibitive so that in these sections the armor is made of synthetic light weight material. The transitions between the two types of armor are made physically concentrated but flexible enough to prevent sharp bends of the cable core as it passes cable laying machinery. The armor joint may be displaced from cable core joints and substantially effectively transfers all longitudinal strain in the cable.

Abstract: A concentric three-conductor cable includes an inner conductor and outer conductors formed of braided strands, and insulating material separating the outer conductors from each other and from the inner conductor, each the other conductors being formed of a plurality of layers and the d-c resistance of the outer conductors being several times smaller than the d-c resistance of said inner conductor.