Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1984-05-25
1987-08-18
Sikes, William L.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
350 9610, 174121A, 174121SR, G02B 644, H01B 700
Patent
active
046872949
ABSTRACT:
A fiber optical cable is designed for good thermal stability over a broad temperature range and with low flame-spreading and low smoke-producing characteristics for interior use, such as in plenum areas. Optical fibers are each buffered with a layer of resilient polymeric material with a broad dynamic temperature range. A nonburning serving shields the buffer layer from flame, and a jacket of polymeric material surrounds the serving. The jacketed cables are bundled with a like number of strength members formed of a material with a coefficient of thermal expansion roughly matched to that of the optical fibers. The strength members and jacketed fibers are wrapped in tape, and the bundled components are tightly jacketed by a tube of polymeric material. The jackets and outer tube are formed of low flame-spreading, low smoke-producing fluorocarbons, whereby the cable meets U.S. requirements for plenum use. The strength and thermal stability provided by the strength members maintain the light-transmitting characteristics of the optical fibers over the broad temperature range.
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Article 770, "Optical Fiber Cables" 1984, pp. 980-982.
Cooper Industries Inc.
Healy Brian M.
Sikes William L.
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