Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1985-04-15
1987-06-30
Lee, John
Electricity: conductors and insulators
Feedthrough or bushing
Compression
174 70R, G02B 644
Patent
active
046765905
ABSTRACT:
A submarine cable with optical fibers which prevents damage to the fibers due to water pressure without the use of an external armor. The cable has a central strand which provides the cable tensile strength and which is surrounded by helically wound tubes which enclose the optical fibers. A layer of plastic material may be provided intermediate the tubes and the strand and the tubes are covered by a layer of plastic material in contact with the tubes. The layer of plastic material contacting the tubes is closely surrounded by a thin metal sheath which, in turn, is closely surrounded by a layer of plastic material. The tube and any spaces radially inwardly of the tubes are filled with a practically incompressible fluid, such as a grease or jelly. The strand may include a wire of good electrical conductivity which, with the sheath, may be used to supply electrical power to repeaters along the cable length.
REFERENCES:
patent: 3710006 (1973-01-01), Davis
patent: 4143942 (1979-03-01), Anderson
patent: 4153332 (1979-05-01), Longoni
patent: 4574192 (1986-03-01), Kitagawa et al.
Lee John
Societa Cavi Pirelli S.p.A.
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