Coaxial cables having improved smoke performance
First Claim
1. A coaxial cable comprising:
- a) an elongate inner conductor;
b) a dielectric layer surrounding the inner conductor;
c) a first outer conductor surrounding the dielectric layer and having perforations defined therein;
d) a second outer conductor surrounding the first outer conductor; and
e) a polymeric jacket surrounding the second outer conductor;
f) wherein the cable is configured such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor; and
e) wherein the first outer conductor has a thickness of between about 0.001 and 0.005 mil.
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Accused Products
Abstract
A coaxial cable includes an elongate inner conductor. A dielectric layer surrounds the inner conductor. A first outer conductor surrounds the dielectric layer and has perforations defined therein. A second outer conductor surrounds the first outer conductor. A polymeric jacket surrounds the second outer conductor. The cable is adapted such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor. According to some embodiments, the second outer conductor defines a plurality of voids therein and, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor and into the voids. According to some embodiments, the second outer conductor is braided.
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Citations
31 Claims
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1. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) a first outer conductor surrounding the dielectric layer and having perforations defined therein; d) a second outer conductor surrounding the first outer conductor; and e) a polymeric jacket surrounding the second outer conductor; f) wherein the cable is configured such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor; and e) wherein the first outer conductor has a thickness of between about 0.001 and 0.005 mil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) an outer conductor surrounding the dielectric layer and having perforations defined therein; d) a polymeric jacket surrounding the outer conductor; e) wherein the perforations in the outer conductor each have an area of between about 0.001 and 0.020 in2; and f) wherein the cable is adapted such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the outer conductor. - View Dependent Claims (23, 24, 25)
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26. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) an outer conductor surrounding the dielectric layer and having perforations defined therein; d) a polymeric jacket surrounding the outer conductor; e) wherein the cable is configured to pass NFPA 262 (2002); f) wherein the cable is configured such that the shielding effectiveness of the cable, as measured in accordance with EN 50289-1-6;
2002, is not degraded by more than about 7 dB as compared to the same cable not having the perforations;g) wherein the cable is configured such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the outer conductor; and h) wherein the outer conductor has a thickness of between about 0.001 and 0.005 mil. - View Dependent Claims (27, 28)
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29. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) a first outer conductor surrounding the dielectric layer and having perforations defined therein; d) a second outer conductor surrounding the first outer conductor; and e) a polymeric jacket surrounding the second outer conductor; f) wherein the cable is adapted such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor; and g) wherein the collective area of the perforations is no more than 2% of the total area of the first outer conductor.
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30. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) a first outer conductor surrounding the dielectric layer and having perforations defined therein; d) a second outer conductor surrounding the first outer conductor; and e) a polymeric jacket surrounding the second outer conductor; f) wherein the cable is adapted such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor; and g) wherein the perforations in the first outer conductor are distributed along the first outer conductor at a rate in the range of from about one perforation per 0.25 inch length of the cable to about one perforation per 3 inches length of the cable.
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31. A coaxial cable comprising:
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a) an elongate inner conductor; b) a dielectric layer surrounding the inner conductor; c) a first outer conductor surrounding the dielectric layer and having perforations defined therein; d) a second outer conductor surrounding the first outer conductor; and e) a polymeric jacket surrounding the second outer conductor; f) wherein the cable is adapted such that, when the dielectric layer is melted, at least a portion thereof and/or smoke therefrom can flow through the perforations in the first outer conductor; and g) wherein the perforations in the first outer conductor have a nominal separation distance of between about 0.75 and 1.25 inches.
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Specification