Abstract: A primary conductor having a solid wire or wire strands that are enclosed by an insulating coating which has ribs that extend radially outwardly. The insulating coating provides electrical insulation between neighboring conductors. The ribs define air spaces which are between the ribs and space the insulated primary conductors from each other, thereby reducing the overall dielectric constant of the cable assembly. This in turn reduces the line-to-line capacitance between adjacent conductors, thereby minimizing Near End Cross Talk.

Abstract: A communication cable includes a core of twisted pairs of electrical conductors and a cable jacket. The inner surface of the cable jacket includes a plurality of sharply angled striations disposed such that adjacent striations define sharply angled inwardly directed projections.

Abstract: A biomedical lead conductor body formed of a coiled wire conductor that is sheathed loosely within a coiled insulative sheath of biocompatible and biostable material allowing a gap or space to be present between the exterior surface of the coiled wire conductor and the adjacent interior surface of the insulative sheath. The coiled insulative sheath is loosely fitted around the coiled wire conductor in order to compensate for defects in the coiled insulative sheath by spreading any corrosion of the wire that may take place because of the defect away from the site of a defect and along the surface of the coiled wire conductor. The lead body is incorporated into unipolar, bipolar or multi-polar biomedical leads having single filar coil windings, or multi-filar coil windings that may be redundantly electrically connected. The coiled wire conductors and coiled insulative sheaths may be parallel-wound and/or coaxially wound within the outer lead body insulative sheath.

Abstract: A coaxial cable having coaxial inner and outer conductors which are separated by a helix of solid dielectric material. The helix extends through the annular space between the inner and outer conductors, and the helix is wound around the inner conductor. The inner edge of the helix engages the inner conductor and the outer edge of the helix engages the outer conductor. The outer edge of the helix forms multiple notches along the length of the helix, and the body of the helix is hollow.

Abstract: This invention is directed to a high performance electrical telecommunication transmission cable, particularly for undercarpet applications. More precisely, this invention is directed to a low-profile, high performance flat cable, where the cable may be subjected to potentially damaging compressive forces from walking on an overlying carpet. The cable comprises a plurality of conductors arranged as plural sets of twisted pairs, with each conductor consisting of an inner conductive core surrounded by insulation, an outer dielectric member having plural longitudinally extending chambers, where each chamber includes two sets of the twisted pairs, spaced-apart and arranged in side-by-side fashion and generally parallel. The height of the chamber is dimensioned to exceed the wrap diameter of a set of a twisted pair of conductors.

Abstract: One embodiment comprises:two bare parallel conductors made of bronze;two insulating rods that are substantially helically wound with non-touching turns around the conductors respectively so that the rods interfit and maintain a predetermined distance between the two conductors; andan insulating protective sheath.The helical pitch of the rods is much greater than the cross-section of the rods so the volume between the two conductors is mostly full of air, thereby obtaining reduced permittivity and thus increased propagation velocity. The invention is applicable to data transmission cables for computer machines.

Abstract: An apparatus for manufacturing a resin cord with enclosed fine metal wires is provided as a unit, in which fine metal wires are supplied from a nipple to a die while extruding a resin around the nipple into the die for burying the fine metal wires in the resin in the length direction of a hollow or solid resin cord, the nipple having a central space in its section perpendicular to the extruding direction and also fine metal wire supply grooves joining the central space, a nozzle made of a wear-resistant material being provided in the central space. The outer diameter of the cord is 0.3 to 2.0 mm, the thickness of the resin part is 0.1 mm or above, the diameter of fine metal wires is 0.03 to 0.2 mm, and the thickness of the resin part is greater than the diameter of the fine metal wires.

Abstract: A multi-conductor hybrid cable construction includes a plurality of inner signal conductors. A unitary dielectric member surrounds, insulates, spaces and joins the inner signal conductors in a circular array about the axis of the cable. An inner conductive shield is disposed about the unitary dielectric member and the surrounded inner conductors. A plurality of outer data conductors are arranged circumferentially about the inner conductive shield. An outer conductive shield is disposed about the outer data conductors. A central dielectric filler is disposed inside the unitary dielectric member, and an insulating jacket is disposed about the outer conductive shield forming the outside of the cable.

Abstract: A telecommunication cable in which pairs of twisted together conductors are spaced apart to minimize capacitance unbalance and cross-talk. A central core member may be provided with the conductor pairs extending around the core member which may have spokes to separate the conductor pairs. Alternatively, the cable jacket has inwardly directed spacers which separate the conductor pins and hold them in recesses defined by the jacket.

Abstract: The cable comprises one or more fiber bundles having 100 or more fibers per bundle, the diameter of the fibers having a value smaller than 20 micrometers, and the fibers preferably consisting of an alloy containing titanium as base metal and, in addition, at least one metal from the group including niobium, tantalum, zirconium, chromium, molybdenum, iron and aluminum. The bundle may be wound around the longitudinal axis of the cable and/or plaited with other bundles. Furthermore, the fibers of a bundle may be twisted (snaked), circumstances permitting. Each bundle and its fibers should, however, run to advantage in a way to have the length of the bundle as well as the length of each fiber of the bundle preferably be not more than 50% and, for example, not more than 30% longer than the cable. The fibers may be bent down to very small radii of curvature, without any fatigue failures taking place, while a relatively low electrical resistance of the cable may be achieved.

Abstract: A twisted pair flat cable suitable for use in undercarpet environments is disclosed. A plurality of twisted pairs are positioned side-by-side, each in separate compartments formed within a hollow envelope of an extruded outer sheath. Separator ribs which do not extend across the entire height of the sheath prevent lateral movement of twisted pairs out of their respective compartments. By cutting the outer sheath at only one location, the outer sheath can be folded back to deploy the twisted pairs for termination. Laterally adjacent solid members suitable for withstanding compressive loads can be employed with a centrally disposed sheath.

Abstract: An optical cable element includes an optical waveguide loosely embedded in a bundle of strength fibers. A protective mantle surrounds the waveguide-containing bundle of strength fibers.

Abstract: A specially configured cable, which, in use, has a cross section which is mmetrical to a vertical line, but asymmetrical to a horizontal line, is used for an intrusion detection system. It comprises an external sheath, which may be round or rectangular in cross section. An inner conductor is positioned below the center of the cable. It is supported in place by a thin, substantially flat, sheet of insulating material, which is attached to the inner surface of the outer sheath. This particular configuration maximizes the change in capacitance caused by an intruder passing over the cable. The cable is connected to a time-domain reflectometer, which can display on a screen the location of the intrusion with respect to an end of the cable as well as the probable type of intrusion.

Abstract: A method of manufacturing a coaxial cable by a continuous process in which a cylindrical dielectric material is extruded about a central conductor, and parts of the dielectric are mechanically removed to form spaces at regular longitudinal intervals. An outer sheath is then applied, providing a low-loss cable having gas-filled spaces which are individually water-tight.

Abstract: A cable for telephone or other communication circuits comprises a number of conductor arrays, specifically pairs or quads of helically intertwined conductors, each conductor having a metal core coated with a thermoplastic sheath in which a multiplicity of short cellulose fibers are embedded; the fibers have an average length of about 1 mm and project generally radially from the sheath over the greater part of their length. The fibers of the twisted wires interpenetrate and form a mat in the intervening spaces which swells in the event of water penetration through a defective envelope, thereby limiting the propagation of moisture along the cable.