Magnetically locatable optical fiber cables containing integrated magnetic marker materials
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United States of America Patent
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Nov 19, 1996
Grant Date -
N/A
app pub date -
Mar 31, 1994
filing date -
Mar 31, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a dielectric optical fiber cable which is capable of being remotely detected while buried. Specifically, this invention incorporates magnetic materials into a layer of epoxy to from a distinct layer within the sheath system of a communications cable. The magnetic particles generate a detection signal which is distinguishable from that generated by a solid metallic pipe and does not adversely affect the operation of existing components of the cable nor does the incorporation of the magnetic marker layer of the present invention unduly limit the speeds at which the overall cable can be manufactured.
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