Magnetically locatable optical fiber cables containing integrated magnetic marker materials
First Claim
Patent Images
1. An optical fiber cable, which includes:
- a core comprising at least one optical fiber transmission medium;
a tubular member in which is disposed said core; and
a sheath system which is disposed about said tubular member and comprises non-metallic magnetic material embedded in a cured epoxy matrix and which enables the cable to be magnetically locatable.
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Accused Products
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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Citations
21 Claims
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1. An optical fiber cable, which includes:
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a core comprising at least one optical fiber transmission medium; a tubular member in which is disposed said core; and a sheath system which is disposed about said tubular member and comprises non-metallic magnetic material embedded in a cured epoxy matrix and which enables the cable to be magnetically locatable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical fiber cable, which includes:
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a core comprising at least one optical fiber transmission medium; a tubular member in which is disposed said core; and a dielectric sheath system which is disposed about said tubular member and includes a plurality of longitudinally extending segments and wherein the sheath system comprises non-metallic magnetic material which enables the cable to be magnetically locatable. - View Dependent Claims (10, 11, 12)
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13. An optical fiber cable, which includes:
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a core comprising at least one optical fiber transmission medium; a tubular member in which is disposed said core; and a sheath system which is disposed about said tubular member and which comprises non-metallic magnetic material concentrically disposed along the length of the cable and which enables the cable to be magnetically locatable. - View Dependent Claims (14, 15, 16)
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17. An optical fiber cable, which includes:
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a core comprising at least one optical fiber transmission medium; a tubular member in which is disposed said core; and a sheath system which is disposed about said tubular member and which comprises non-metallic magnetic material disposed in a longitudinal strip along the length of the cable and which enables the cable to be magnetically locatable. - View Dependent Claims (18, 19, 20, 21)
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Specification