Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1985-09-11
1988-02-09
LaRoche, Eugene R.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
174 70A, G02B 644
Patent
active
047238321
ABSTRACT:
A composite overhead cable structure for electric and optical transmission comprising a pipe, at least one layer of stranded metallic elongated conductor surrounding the outer periphery of said pipe in close contact with said outer periphery, and an optical fiber cable tightly disposed within and extending throughout the length of said pipe through the medium of a packing comprised of at least one double packing layer of a non-metallic soft packing layer and a non-metallic rigid packing layer, thereby providing fixed package of said optical fiber cable in said pipe through said packing so that said optical fiber is unmovable relative to said pipe. With such a structure, the optical fiber cable is effectively prevented from not only occurrence of local bending or, but also from suffering excessive lateral forces, which leads to elimination of a danger that the optical fiber be damaged, thereby enabling the optical transmission properties to be stably maintained.
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"Principles of Fibre-Optical Cable Design", S. G. Foord, et al., Proc. IEE, vol. 123, No. 6, Jun. 1976, pp. 597-602.
"Optical Fiber Packaging and its Influence on Fiber Straightness and Loss", D. Bloge, The Bell System Technical Journal, vol. t4, No. 2, Feb. 1975, pp. 245-262.
Honma Yoshikatsu
Kobayashi Toshi-aki
Okazato Akira
Yoshimura Hironori
Fujikura Limited
LaRoche Eugene R.
Mottola Steven J.
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