# US 5,103,067 A · Shielded wire and cable > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,103,067 A - Document ID: US5103067A - Status: Granted - Kind: A - Application number: 07/691,571 - Filed: 1991-04-25 - Granted: 1992-04-07 - Earliest claimed: 1991-02-19 - Assignees: Champlain Cable Corporation - Inventors: Mahmoud Aldissi - Web page: https://patentgrep.com/patent/US5103067A ## CPC - H01B 11/1033: {composed of a wire-braided conductor} - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly that of low weight. The article generally comprises an inner conductive core of one or more wires that can be bare or individually insulated, and that can be straight, twisted or braided within the core. The core can also comprise a multicore consisting of a plurality of core members. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is applied. The shielding comprises a braided or served mesh or woven yarn of metallically coated fibers, characterized by high tensile strength and flexibility. Where the fibers themselves are braided, the resulting mesh can be braided more tightly about the interior insulation surface than can conventional meshes. Also, the high tensile strength requirement for the yarn permits a thinner fiber to be utilized, wherein a greater shield weight reduction can be realized. This thinner metal coating greatly reduces the shielding weight of the shield mesh. ## Claims ### Claim 1 A cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers that are braided into a mesh to provide a protective shield layer disposed over the insulated conductive core member, said braided mesh forming a shield layer that exceeds 96% coverage of said at least one layer of insulation and providing shielding effectiveness of at least approximately between 10.sup.1 and 10.sup.3 ohms of impedance across a frequency range of between 100 KHz and 300 MHz; and a jacket disposed over said protective shield layer comprising at least one layer of material. ### Claim 2 (depends on 1) The cable article in accordance with claim 1, wherein said protective shield layer comprises fibers coated with silver. ### Claim 3 (depends on 1) The cable article in accordance with claim 1, wherein said conductive core member comprises a plurality of metallic wires that are straight, braided or twisted. ### Claim 4 (depends on 1) The cable article in accordance with claim 1, wherein said conductive core member comprises a plurality of metallic wires that are individually insulated. ### Claim 5 (depends on 1) The cable article in accordance with claim 1, formed into a twin pair of cables. ### Claim 6 (depends on 1) The cable article in accordance with claim 1, wherein said conductive core member comprises a multicore member. ### Claim 7 (depends on 1) The cable article in accordance with claim 1, wherein said jacket is selected from at least one material from a group of materials consisting of: fluoropolymer; fluorocopolymer; polyimide; halogen-free insulation; and irradiated, cross-linked ethylenetetrafluoroethylene polymer. ### Claim 8 (depends on 1) The cable article in accordance with claim 1, wherein said at least one insulation layer is selected from at least one material from a group of materials consisting of: fluoropolymer; fluorocopolymer; polyimide; halogen-free insulation; and irradiated, cross-linked ethylene-tetrafluoroethylene polymer. ### Claim 9 (depends on 1) The cable article of claim 1, wherein the aramid fibers are coated with a metal layer comprising approximately between 15% to 40% by weight of the fiber. ### Claim 10 (depends on 1) The cable article of claim 1, wherein said shield layer further comprises metal wires braided with said aramid fibers to provide a combination mesh of wire and fiber. ### Claim 11 A light weight cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers having a diameter of approximately between 50 and 10,000 densier, that are braided into a mesh to provide a protective shield layer disposed over the insulated conductive core member and covering said insulated conductive core member in excess of approximately 96% to provide shielding effectiveness of at least approximately between 10.sup.1 and 10.sup.3 ohms of impedance across a frequency range of between 100 KHz and 300 MHz; and a jacket layer disposed over said protective shield layer. ### Claim 12 (depends on 11) The cable article in accordance with claim 11, wherein said protective shield layer comprises fibers coated with silver. ### Claim 13 (depends on 11) The cable article in accordance with claim 11, wherein said conductive core member comprises a plurality of metallic wires that are braided or twisted. ### Claim 14 (depends on 11) The cable article of claim 11, wherein the aramid fibers are coated with a metal layer comprising approximately between 15% to 40% by weight of the fiber. ### Claim 15 (depends on 11) The cable article of claim 11, wherein said shield layer further comprises metal wires braided with said aramid fibers to provide a combination mesh of wire and fiber.