Method for manufacturing helical optical fiber

Details Method for manufacturing helical optical fiber Method for manufacturing helical optical fiber

1976-09-28

1977-06-07

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

28 12, 28 721, 57 34HS, 65 11W, 65 12, 65DIG7, 264 1, 264168, 350 96B, C03B 3702

Patent

active

040280810

ABSTRACT:
An optical cable which is relatively immune to the effects of bending and/or tension comprises a helical optical fiber loosely confined within a protective sheath. Apparatus is disclosed for fabricating the helical fiber. For example, as the fiber is drawn from a heated preform the fiber is subjected to periodic, pulsating jets of an inert gas, such as nitrogen, which physically deform the fiber into the desired helical configuration.

REFERENCES:
patent: 1151487 (1915-08-01), Loewe
patent: 2313630 (1943-03-01), Dockerty
patent: 2542973 (1951-02-01), Abernathy
patent: 2708813 (1955-05-01), Bourgeaux
patent: 3063094 (1962-11-01), Warthen
patent: 3282668 (1966-11-01), Mabru
patent: 3292270 (1966-12-01), Spunt
patent: 3538206 (1970-11-01), Hann
patent: 3553952 (1971-01-01), McIntosh
patent: 3696478 (1972-10-01), Elliott et al.
patent: 3912478 (1975-10-01), Presby

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