Patent US4606604A successfully refreshed from Google Patents.
US4606604A
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Optical fiber submarine cable and method of making
Assignee: Optelecom Inc
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Filing: 1984-05-16
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Granted: 1986-08-19
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Expires: 2004-05-16
Abstract
Abstract An optical fiber submarine cable includes a fiber optic bundle sealed within a precompressed electrically conductive tube defining a hermetic cavity. An inner layer of helically wound copper-plated steel wires is disposed around the electrically conductive tube. An outer layer of oppositely helically wound copper-plated steel wires is preferably disposed around the inner layer. The wires are tightly wound at a pitch of between 8 DEG and 20 DEG and the outer wires balance the torque from the inner wires. An insulation layer of polyethylene surrounds the outer armor layer. A method of making the cable uses precompression of the tube to increase the strength of the cable.
Inventors
- 👤 Charles Soodak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:01
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4427; G02B6/4416; G02B6/4479; G02B6/4486; G02B6/449
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
An optical fiber submarine cable comprising; (a) at least one optic fiber; (b) a longitudinally precompressed electrically conductive tube defining a hermetic cavity in which said optic fiber is disposed; (c) an inner armor layer having a plurality of electrically conductive inner wires helically wound tightly around said tube in one direction at a pitch of between 8° and 20°; and (d) an external insulation layer; and wherein said cable is less than 1/2" in diameter, and wherein said tube is longitudinally precompressed to approximately 50% of its yield point such that said tube will return from a stressed yield condition to within 0.1% of its precompressed length.
Claim 2
Dependent Claim
108 words
An optical fiber submarine cable comprising; (a) at least one optic fiber; (b) a longitudinally precompressed electrically conductive tube defining a hermetic cavity in which said optic fiber is disposed; (c) an inner armor layer having a plurality of electrically conductive inner wires helically wound tightly around said tube in one direction at a pitch of between 8° and 20°; and (d) an external insulation layer; and wherein said cable is less than 1/2" in diameter, and wherein said tube is longitudinally precompressed to approximately 50% of its yield point such that said tube will return from a stressed yield condition to within 0.1% of its precompressed length.
Claim 3
Dependent Claim
17 words
The optical fiber submarine cable of claim 1 wherein said tube is a high conductivity copper alloy.
Claim 4
Dependent Claim
70 words
The optical fiber submarine cable of claim 1 further comprising: an outer armor layer having a plurality of electrically conductive outer wires helically wound tightly around said inner armor layer in an opposite direction to said one direction and having a pitch of between 8° and 20°, torque from said outer armor layer balancing torque from said inner armor layer, and wherein said insulation layer surrounds said outer armor layer.
Claim 5
Dependent Claim
21 words
The optical fiber submarine cable of claim 3 wherein said inner wires and said outer wires are copper plated steel wires.
Claim 6
Dependent Claim
98 words
An optical fiber submarine cable comprising: (a) at least one optic fiber; (b) a longitudinally precompressed electrically conductive tube defining a hermetic cavity in which said optic fiber is disposed; (c) an inner armor layer having a plurality of electrically conductive inner wires helically wound tightly around said tube in one direction at a pitch of between 8° and 20°; and (d) an external insulation layer; and wherein said tube is longitudinally precompressed to approximately 50% of its yield point such that said tube will return from a stressed yield condition to within 0.1% of its precompressed length.
Claim 7
Dependent Claim
98 words
An optical fiber submarine cable comprising: (a) at least one optic fiber; (b) a longitudinally precompressed electrically conductive tube defining a hermetic cavity in which said optic fiber is disposed; (c) an inner armor layer having a plurality of electrically conductive inner wires helically wound tightly around said tube in one direction at a pitch of between 8° and 20°; and (d) an external insulation layer; and wherein said tube is longitudinally precompressed to approximately 50% of its yield point such that said tube will return from a stressed yield condition to within 0.1% of its precompressed length.
Claim 8
Dependent Claim
70 words
The optical fiber submarine cable of claim 5 further comprising: an outer armor layer having a plurality of electrically conductive outer wires helically wound tightly around said inner armor layer in an opposite direction to said one direction and having a pitch of between 8° and 20°, torque from said outer armor layer balancing torque from said inner armor layer, and wherein said insulation layer surrounds said outer armor layer.
References Cited (Backward Citations)
US3813098A
Cited
US4072398A
Cited
US4097119A
Cited
US4199224A
Cited
US4146302A
Cited
US4160872A
Cited
US4110001A
Cited
US4359598A
Cited
US4156104A
Cited
US4239336A
Cited
US4278835A
Cited
GB2029048A
Cited
US4341440A
Cited
US4371234A
Cited
US4317000A
Cited
GB2085187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |