Communication cable

Details Communication cable Communication cable

1995-03-09

1997-08-19

Kincaid, Kristine L.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174 36, 1741282, H01B 1104

Patent

active

056591527

ABSTRACT:
A communication cable formed by cabling units such that each two adjacent units have different twist pitches, each unit including insulated wire pairs twisted together. A twist pitch P.sub.i of insulated wire pair T.sub.i selected among insulated wire pairs constituting a unit U.sub.i, and a twist pitch P.sub.j of insulated wire pair T.sub.j selected among insulated wire pairs constituting a unit U.sub.j, are different. Twist pitches P.sub.i and P.sub.j are selected from a region which satisfies expression (1) and either (2) or (3). Twist pitch P.sub.i and twist pitch P.sub.k of insulated wire pair T.sub.k selected among insulated wire pairs constituting a unit U.sub.k, are selected from a region which satisfies expression (4) where twist pitches P.sub.i and P.sub.k are in compliance with prior conditions given by (4). In the following expressions, x represents a unit diametrical component, y represents a unit lengthwise component and d is the outside diameter of insulated wires which constitute the insulated wire pairs.

REFERENCES:
patent: 3546357 (1970-12-01), MacPherson et al.
patent: 3879518 (1975-04-01), Ney et al.
patent: 3978275 (1976-08-01), Ishihara et al.
patent: 4604862 (1986-08-01), McGettigan et al.
patent: 5424491 (1995-06-01), Walling et al.
EIA/TIA (Electronic Industries Association/Telecommunications Industry Association) Standards Proposal No. 2840 (Commercial Building Telecommunications Cabling Standard), Washington, D.C., USA, 1993.
ISO/IEC Joint Technical Committee 1, Draft Minutes of the 14 meeting of WG3 at Lannion, France, 1993.

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