1978-03-10
1980-01-01
Levy, Stewart J.
350 9626, 350 9623, G02B 516
Patent
active
041813979
ABSTRACT:
A fibre-optic cable includes a fibre-bundle, for transmitting light along the cable, that is sealed at either end to a metal ferrule. Each end of the fibre-bundle projects a short distance from its respective ferrule and is enclosed by a metal collar which is welded to the ferrule. The projecting ends of the fibre-bundle are sealed to the ferrules by melting a glass tube within each collar about the ends of the fibre-bundle. A thread of glass or Silastomer material extends between the two ferrules and is helically wound about the fibre-bundle so as to hold together the fibres of the fibre-bundle. Convoluted outer metal tubing extends about the fibre-bundle and is welded at each end to respective ferrules. The fibre-bundle is cushioned within the outer tubing by a sleeve of woven fibre which also extends between the two ferrules about the fibre-bundle and the helical thread. The outer tubing may be evacuated or contain an inert gas at low pressure, or the outer tubing could contain a lubricant such as powdered polytetrafluoroethylene. Alternatively, a silicone oil could be used as a lubricant and, where the cable is to have one end mounted at a hot location, the silicone oil could be chosen to be a gel at that end while being a liquid where cooler, away from that end.
REFERENCES:
patent: 2959090 (1960-11-01), Davies
patent: 3050907 (1962-08-01), Hicks, Jr. et al.
patent: 3051035 (1962-08-01), Root
patent: 3691001 (1922-09-01), Takahashi et al.
patent: 3699950 (1922-10-01), Humphrey, Jr. et al.
patent: 3750058 (1973-07-01), Bankert, Jr. et al.
Baker Peter D.
Luke Douglas V.
Levy Stewart J.
Smiths Industries Limited
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