Electricity: conductors and insulators – Conduits – cables or conductors – Insulated
Patent
1993-06-24
1995-03-21
Nimmo, Morris H.
Electricity: conductors and insulators
Conduits, cables or conductors
Insulated
174 34, 174113AS, 174117AS, H01B 1102, H01B 708
Patent
active
053998138
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. Adjacent chambers include a dielectric vertically disposed wall therebetween to provide resistance to compressive forces, and the twisted pairs therewithin exhibit a preferred twist on the order of 1/2 to 1 inch lay length. For cable lengths of at least 1000 feet, the cable is characterized by an attenuation and NEXT loss which exceed the Category 5 requirements of EIA TSB-36.
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BICSI Newsletter; AT&T Systimax Structured Cabling Systems; Dec. 1992; vol. 13 No. 3.
EIA/TIA Bulletin; Technical Systems Bulletin Additional Cable Specifications for Unshielded Twisted Pair Cables; pp. 1-5; Nov. 1991.
Kilpatrick Jerry B.
McNeill David B.
Nimmo Morris H.
Noll William B.
The Whitaker Corporation
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