Electricity: conductors and insulators – Conduits – cables or conductors – Insulated
Patent
1983-03-28
1985-04-09
Grimley, A. T.
Electricity: conductors and insulators
Conduits, cables or conductors
Insulated
174121R, 174121SR, H01B 700
Patent
active
045103488
ABSTRACT:
A relatively small pair size cable (20) comprising at least one insulated conductor (22) is provided with a flame retardant, smoke suppressive non-metallic sheath system (30). The sheath system has a relatively low thermal conductivity and provides a predetermined delay prior to the thermal decomposition of the conductor insulation. It includes an inner layer (31) of an inorganic cellular material which has a relatively low air permeability and two tapes (41, 42) which are wrapped helically about the inner layer with overlapped sealed seams. Each tape comprises a flame retardant thermosetting material. In an alternative embodiment, the heat absorptivity of the sheath system is increased substantially to facilitate the sealing of the seams as the cable is moved along a manufacturing line. This may be accomplished by using an inorganic cellular material which has a relatively high absorptivity or by facing the inner layer or one of the tapes with a material which is heat absorptive.
REFERENCES:
patent: 2691694 (1954-10-01), Young
patent: 3265808 (1963-12-01), Binch
patent: 3425865 (1969-02-01), Shelton, Jr.
patent: 3692924 (1972-09-01), Nye
patent: 4051324 (1977-09-01), Anderson et al.
patent: 4134953 (1979-01-01), Dembiak et al.
patent: 4150249 (1979-04-01), Pedersen
patent: 4151366 (1979-04-01), Betts et al.
patent: 4154976 (1979-05-01), Brorein
patent: 4284842 (1981-08-01), Arroyo et al.
patent: 4327001 (1982-04-01), West et al.
patent: 4370076 (1983-01-01), Sullivan et al.
Plenum Cable of Teflon.RTM. FEP, Du Pont Catalog.
Kapton, Polyimide Film, A Light Extremely Tough Insulation Available for Highest Reliability Performance, Du Pont Catalog.
Kapton, Polyimide Film, High Performance Wire and Cable Insulation, Du Pont Catalog.
Arroyo Candido J.
Cogelia Nicholas J.
Darsey Ralph J.
AT&T - Technologies, Inc.
AT&T Bell Laboratories
Grimley A. T.
Nimmo Morris H.
Somers E. W.
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