Self-supporting optical cable
AssigneeKupferdraht-Isolierwerk AG
InventorOthmar Voser
Life of this patent
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Abstract
An optical cable has a core (1) which comprises at least one optical conductor (7) stranded around a central member (6). The core (1) with the optical conductors (7) is enclosed by a reinforcing layer (2) comprising strength members (11). These strength members (11) are profiled bodies with flat cross section wherein the side faces (12, 13) of adjacent members (11) are in contact with each other and support each other. The strength members (11) form around the core (1) a closed jacket stable against changes of diameter. The optical conductors (7) are stranded around the central member (6) so that after each turn the direction of stranding changes, i.e. one turn to the right, the next to the left, then again to the right, etc. Thereby a wave-like stranding of the optical conductors (7) is formed.
Claims16
A self-supporting optical cable, comprising:
- a central member;
- at least one optical conductor stranded around said central member in a plurality of turns which change direction substantially after each turn and which have a diameter around said central member, each turn having a length which is at least five times the diameter of the turn, said central member and said at least one optical conductor forming a core;
- a plurality of strength members positioned around and at a distance from said core, each strength member comprising an elongated profiled body having a substantially flat cross section and formed at least partly of reinforcing fibers, each strength member having a pair of opposite side faces which engage side faces of adjacent strength members around said core to form a compression-proof closed jacket around said core which is stable against changes of diameter of said jacket;
- and
- an outer protective jacket around said closed jacket.
Dependencies are inferred from the claim text.