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Dual insulated data cable

  • US 5,220,130 A
  • Filed: 08/06/1991
  • Issued: 06/15/1993
  • Est. Priority Date: 08/06/1991
  • Status: Expired due to Fees
First Claim
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1. An electrical signal cable for use in a system for transmitting high speed data over low speed data or telephone lines, said low speed data or telephone lines having a plurality of existing connectors which make electrical contact by piercing an insulating jacket on said low speed or telephone lines, comprising an insulating polymer signal cable outer jacket, said signal cable outer jacket surrounding at least two high speed data cables and at least two power line cables and at least one ground able, each of said high speed data cables having a central conductor, an insulating non-foam polymer high speed signal jacket surrounding said central conductor, an insulating foam polymer high speed signal jacket surrounding said non-foam polymer high speed signal jacket and a metal shield means surrounding said foam polymer high speed signal jacket, said foam polymer high speed signal jacket having a larger thickness than said non-foam polymer high speed signal jacket and wherein said foam and non-foam insulation being an adequate insulation to reduce a capacitance loading between said power cables and said high speed data cables with reduction of noise being to levels which are below a level necessary for high speed data transmission, each of said power line cables having a central power line conductor and an insulating non-foam polymer power line jacket surrounding said power line conductor;

  • and at least one end of said signal cable having a portion of said high speed data cables and said power line cables extending beyond said signal cable outer jacket, and said high speed data cables having a stepped insulation end with said non-foam insulation high speed jacket extending beyond said foam insulation high speed jacket.

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