Electricity: conductors and insulators – Conduits – cables or conductors – Conductive armor or sheath
Patent
1979-10-31
1981-08-18
Kucia, Richard R.
Electricity: conductors and insulators
Conduits, cables or conductors
Conductive armor or sheath
174102D, 174109, 174110FC, 174121A, H01B 734
Patent
active
042848423
ABSTRACT:
A cable (20) specially suited for use in building plenums because of its low flame spread and smoke evolution includes a multiconductor core (22) which is enclosed in a sheath comprising an inorganic, cellular core wrap (31), a corrugated metallic barrier (40) and dual layers (51) and (52) of a polyimide tape which are wrapped helically about the barrier in a manner that avoids a compression of the core wrap. The sheath is effective to resist heat transfer inwardly toward the core by conduction while the metallic barrier reflects radiant heat. Advantageously, the sheath containerizes the core without unduly compressing it and thereby allows the intumescence of conductor insulation during a fire to form char which is effective to suppress the evolution of smoke and the propagation of flame.
REFERENCES:
patent: 2009004 (1935-07-01), Schatzel
patent: 2135985 (1938-11-01), Mitchell
patent: 2603684 (1952-07-01), Holmes
patent: 3425865 (1967-02-01), Schelton
patent: 3484532 (1969-12-01), Anderson
patent: 3509269 (1970-04-01), Elliott
patent: 3551586 (1970-12-01), Dembiak
patent: 3692924 (1972-09-01), Nye
patent: 3903354 (1975-09-01), Dageforde
patent: 4064359 (1977-12-01), Peterson
patent: 4134953 (1979-01-01), Dembiak
patent: 4150249 (1979-04-01), Pedersen
patent: 4151366 (1979-04-01), Betts
patent: 4154976 (1979-05-01), Brorein
Arroyo Candido J.
Cogelia Nicholas J.
Darsey Ralph J.
Bell Telephone Laboratories Inc.
Kucia Richard R.
Somers E. W.
Western Electric Company Inc.
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