Optical cable with thixotropic filling compound
First Claim
1. In a strand element for an optical cable, said element consisting of several light waveguide fibers for light wave transmission and a protective casing which loosely surrounds the fibers, the interior diameter of the casing being larger than the exterior diameter of a hypothetical cylinder surrounding the fibers, the improvements comprising each of the fibers being surrounded by a layer of softly elastic material, said fibers being stranded with one another with a back twist with a long length of lay in a range of between 50 and 500 mm, said protective casing being a hard protective casing capable of resistance, and the space between the optical fibers and the hard protective casing being filled with an easily shapeable filling compound consisting of thixotropized oils, said filling compound remaining soft and having no tendency towards aging, melting or freezing.
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Abstract
A strand element for an optical cable which strand element has several light waveguide fibers for transmission of light waves received in a protective casing which surrounds the fibers and has an internal interior diameter which is larger than the exterior diameter of a hypothetical cylinder which surrounds the fibers characterized by each of the fibers being surrounded by a soft elastic material and being stranded with one another, and the space between the stranded optical fibers and the protective casing, which is capable of resistance, being filled with an easily shapeable filling compound which remains very soft and which displays no tendencies towards aging, melting or freezing.
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Citations
14 Claims
- 1. In a strand element for an optical cable, said element consisting of several light waveguide fibers for light wave transmission and a protective casing which loosely surrounds the fibers, the interior diameter of the casing being larger than the exterior diameter of a hypothetical cylinder surrounding the fibers, the improvements comprising each of the fibers being surrounded by a layer of softly elastic material, said fibers being stranded with one another with a back twist with a long length of lay in a range of between 50 and 500 mm, said protective casing being a hard protective casing capable of resistance, and the space between the optical fibers and the hard protective casing being filled with an easily shapeable filling compound consisting of thixotropized oils, said filling compound remaining soft and having no tendency towards aging, melting or freezing.
Specification