Transmission cable with helical support elements of curvilinear profile
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United States of America Patent
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-
Apr 30, 1985
Grant Date -
N/A
app pub date -
Mar 5, 1982
filing date -
Mar 6, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Metallic load-carrying elements (3,23) are helically spun around a central member (1,21) comprising a supporting member or members (9,24) constituting a structure (4,24) which defines at least one passage (6,26) wholly accommodating at least one electrical or optical transmission element (7,27). The transmission element is thereby protected against stresses applied to the load-carrying elements. The central structure is radially and longitudinally self-supporting. The central member (1,21) is formed by causing the supporting member or members (9,24) and the transmission element or elements (7,27) to converge to a point from which the central member (1,21) is withdrawn continuously. The load-carrying elements (3,23) are subsequently applied to the central member (1,21). Cables of practically unlimited length can be produced.
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