EP0090585A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rodent-resistant non-conductive optical fiber cable
Assignee: Sea Log Corp
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Filing: 1983-03-22
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Granted: —
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Expires: 2003-03-22
Abstract
Abstract There is provided a cable (10) construction which resists attack by mammals fowl or fish. The cable construction consists of a core (12) containing at least one optical fiber (14) about which there is an organic cushion layer (20), preferably polymeric in nature. About the cushion layer (20) there are a pair of counter-helically wound resin-impregnated inorganic fibers (22, 24) to provide tensile and hoop strength. About the pair of counter-helically wound inorganic fibers there is provided one or more layer(s) of resin-impregnated inorganic fibers (26, 28) helically-wound to an angle greater than 60°, and preferably approaching 90°. These fibers when bitten provide needle-like projections which irritate the mammal, e. g., rodent, fowl or fish and discourage any attempt to continue to attack the cable. The cable (10) is normally provided with an outer casing of a thermoplastic polymer for handling purposes. It may also include a layer containing abrasive materials which also deters attack by mammal, fowl or fish.
Inventors
- 👤 Robert James Considine
- 👤 Joseph Frankly Schirtzinger
- 👤 Kenneth Martin Stiles
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 10:54
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
176 words
A non-metallic rodent-resisntant optical fiber cable comprising: a) an inner core comprising at least one optical fiber, said inner core defining a cable axis; b) an organic cushion layer surrounding said inner core; c) a first layer of helically-wound resin-bonded inorganic fibers wound about the cushion layer at a first lay angle relative to the cable axis of up to about 45 degrees; d) a second layer of helically-wound resin-bonded inorganic fibers wound about the first layer of helically-wound resin-bonded inorganic fibers at a second lay angle opposite to the direction of lay of the first lay angle and at a lay angle relative to the cable axis of up to about 45 degrees; and e) at least one additional layer of helically-wound resin-bonded inorganic fibers wound about the second layer of helically-wound inorganic fibers at a wrap angle greater than about 60 degrees and less than 90 degrees relative to the cable axis, said layers of helically-wound resin-bonded inorganic fibers cooperating to form a substantially balanced resin-bonded fiber assembly which is substantially non-twisting and non-kinking.
Claim 2
Dependent Claim
176 words
A non-metallic rodent-resisntant optical fiber cable comprising: a) an inner core comprising at least one optical fiber, said inner core defining a cable axis; b) an organic cushion layer surrounding said inner core; c) a first layer of helically-wound resin-bonded inorganic fibers wound about the cushion layer at a first lay angle relative to the cable axis of up to about 45 degrees; d) a second layer of helically-wound resin-bonded inorganic fibers wound about the first layer of helically-wound resin-bonded inorganic fibers at a second lay angle opposite to the direction of lay of the first lay angle and at a lay angle relative to the cable axis of up to about 45 degrees; and e) at least one additional layer of helically-wound resin-bonded inorganic fibers wound about the second layer of helically-wound inorganic fibers at a wrap angle greater than about 60 degrees and less than 90 degrees relative to the cable axis, said layers of helically-wound resin-bonded inorganic fibers cooperating to form a substantially balanced resin-bonded fiber assembly which is substantially non-twisting and non-kinking.
Claim 3
Dependent Claim
83 words
An optical fiber cable as claimed in claim 1 in which said additional layer of helically-wound resin-bonded inorganic fibers comprises a third layer of helically-wound resin-bonded inorganic fibers wound about the second layer of helically-wound resin-bonded inorganic fibers at a lay angle opposite the second layer of helically-wound resin-bonded inorganic fibers and a fourth layer of helically-wound resin-bonded inorganic fibers wound about the third layer of helically-wound resin-bonded inorganic fibers at a lay angle opposite the. third layer of helically-wound resin-bonded inorganic fibers.
Claim 4
Dependent Claim
32 words
An optical fiber cable as claimed in claim 1 or 2 in which there is provided over said additional layer of helically-wound resin-bonded inorganic fibers a surrounding layer of an abrasive material..
Claim 5
Dependent Claim
35 words
An optical fiber cable as claimed in claim 1, 2 or 3 in which there is provided over said additional layer of helically-wound resin-bonded inorganic fibers a surrounding layer of an ultraviolet radiation-resistant polymeric material.
Claim 6
Dependent Claim
31 words
An optical fiber cable as claimed in any one of the previous claims in which the organic cushion layer has a wall thickness of from about 0.1 to about 0.2 inch.
Claim 7
Dependent Claim
48 words
An optical fiber cable as claimed in any one of the previous claims in which the lay angles of said first and said second layers of helically-wound resin-bonded inorganic fibers are each at an angle of from about 5 degrees to about 45 degrees to the cable axis.
Claim 8
Dependent Claim
41 words
An optical fiber cable as claimed in any one of the previous claims in which the helically-wound resin-bonded inorganic fibers of said additional layer are at an angle of from about 80 degrees to about 89 degrees to the cable axis.
Claim 9
Dependent Claim
175 words
A non-metallic rodent-resistant optical fiber cable comprising: a) an inner core comprising at least one optical fiber, said inner core defining a cable axis; b) a polymeric cushion layer surrounding said inner core; c) a first layer of helically-wound resin-bonded glass fibers wound about the cushion layer at a first lay angle relative to the cable axis of from about 5 degrees to about 45 degrees; d) a second layer of helically-wound resin-bonded glass fibers wound about the first layer of helically-wound resin-bonded glass fibers at a second lay angle opposite the direction of lay of the first lay angle and at a lay angle relative to the cable axis of from about 5 degrees to about 45 degrees; and e) at least one additional layer of helically-wound resin-bonded glass fibers wound about the second layer of hel-ically-wound resin-bonded glass fibers at a lay angle of from about 80 degrees to about '89 degrees relative to the cable axis, cooperating to form a substantially balanced resin-bonded glass fiber assembly which is substantially non-twisting and non-kinking.
Claim 10
Dependent Claim
175 words
A non-metallic rodent-resistant optical fiber cable comprising: a) an inner core comprising at least one optical fiber, said inner core defining a cable axis; b) a polymeric cushion layer surrounding said inner core; c) a first layer of helically-wound resin-bonded glass fibers wound about the cushion layer at a first lay angle relative to the cable axis of from about 5 degrees to about 45 degrees; d) a second layer of helically-wound resin-bonded glass fibers wound about the first layer of helically-wound resin-bonded glass fibers at a second lay angle opposite the direction of lay of the first lay angle and at a lay angle relative to the cable axis of from about 5 degrees to about 45 degrees; and e) at least one additional layer of helically-wound resin-bonded glass fibers wound about the second layer of hel-ically-wound resin-bonded glass fibers at a lay angle of from about 80 degrees to about '89 degrees relative to the cable axis, cooperating to form a substantially balanced resin-bonded glass fiber assembly which is substantially non-twisting and non-kinking.
Claim 11
Dependent Claim
31 words
An optical fiber cable as claimed in claim 8 in which there is provided over said additional layer of helically-wound resin-bonded glass fibers a surrounding polymeric layer containing an abrasive material.
Claim 12
Dependent Claim
82 words
An optical fiber cable as claimed in claim 8 or 9 in which there is provided an outer surrounding layer of an ultraviolet radiation-resistant polymeric material and in which the polymeric cushion layer has a wall thickness of from about 0.1 to about 0.2 inch, and in which the resin content of each layer of helically-wound resin-bonded glass fibers independently contains from about 20 to about 30 percent by weight resin, based on the weight of the resin and the glass fibers.
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WO1980001517A1
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