Abstract: This internally shielded telephone cable provides more efficient shielding for meeting near-end crosstalk requirements in carrier systems having expanded channel capacity and increase in equivalent frequency from 772 kHz to 1.576 MHz or higher. The improved shielding uses tapes bent into configurations that obtain greater shielding area from a single tape, and constructions that are less expensive than prior art and produce a mechanically stronger and more unitary cable structure.

Abstract: A cable shielding tape comprising a first layer of substantially pure aluminum bonded to a second layer of aluminum alloy which can beneficially be used in cable constructions designed for the transmission of electric power or communications. The cable shielding tape may be formed as a strip having one or both sides coated with or laminated to an adhesive thermoplastic resinous polymer. The tape is disposed within a cable at the desired location to provide good mechanical and electrical properties therein. In addition to providing good mechanical and electrical properties for a cable, the aluminum/aluminum alloy shielding tape substantially reduces the problem of bi-metallic galvanic corrosion caused as a result of interfacing metals having widely differing electrolytic potentials.

Abstract: A method and means for grounding the conductive layer of a long power cable is provided wherein at least one metal wire is provided which is connected on one end to the metal sheath prior to the application of an insulation sheath. The outer portion of the metal wire is pulled through an opening made at a predetermined place at the insulation sheath whereupon the hole in the insulation is sealed immediately. Thereafter the metal wire is electrically interconnected to the armor sheath either during or after the application of the armoring sheath layers.

Abstract: A cable for high frequency use in an environment with high and varying thermal changes whereby the thermal expansion of the cable is controlled by having a highly electrically conductive metal bonded to a metal of low coefficient of thermal expansion relative to the high electrically conductive metal. This is accomplished by providing a thin layer of highly electrically conductive metal over an inner core of a metal of low coefficient of thermal expansion. The cable can also utilize a similar bonded metal configuration for an outer concentric conductive sheath having a mineral dielectric between conductors that also has a low coefficient of thermal expansion.

Abstract: A shielded electrical cable is described having improved interference immunity and radio frequency screening by virtue of the mode of application of the shield. The shield is insulated from the inner conductor or conductors and comprises a pair of coaxial wire braid layers separated by a continuous metal tube which is flexible and does not bind upon the underlying braid. The tube is peferably formed from mu-metal or other metal tape wound onto the braid in partially overlapping helical turns, the winding tension is insufficient for the overlapping margin to compress the underlying margin of the previous turn, this latter operation being performed in a rotary tubular die whose bore allows for a small annular clearance to be preserved between the wound tape tube and the underlying wire braid.

Abstract: A cable for transmitting high electric energies comprises an inner tubular member which is provided with a channel for conducting a cooling medium, an outer tubular member surrounding the inner tubular member, a cable jacket surrounding the outer tubular member with spacing, and an insulation provided intermediate the outer tubular member and the cable jacket. The inner and outer tubular members are circumferentially complete so that the cooling medium cannot escape into the insulation and cause damage thereto. The inner tubular member may itself serve as an electric conductor, or a separate electric conductor may be situated intermediate the inner and the outer tubular members.