US4371234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine optical cable
Assignee: Alcatel Submarine Systems BV
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Filing: 1980-11-13
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Granted: 1983-02-01
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Expires: 2000-11-13
Abstract
Abstract An optical fiber cable intended for submarine use has a central cylindrical strength member (1) over which are laid the optical fibers (2). These are within a sheath 3, itself within an aluminum tube (4), usable to convey electrical power for repeaters. On the outside of this tube we have a layer of high tensile steel wires (5), surrounded by a layer of low density polyethylene. In a cable for shallower waters where the risk of damage is greater than in deep water the polyethylene layer is surrounded by a layer of armouring wires separated from the polyethylene by bedding material and enclosed by a layer of binding material.
Inventors
- 👤 Colin S. Parfree
- 👤 Peter Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:52
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486; G02B6/4488; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4427
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
An optical fiber cable including a central cylindrical strength member, a plurality of coated optical fibers laying about the surface of said strength member, a layer of thermoplastic or rubber-like material enclosing the optical fibers, a metallic tube enclosing and laying about said layer, said tube being usable as an electrical conductor, a layer of high tensile steel wires laying about said metallic tube, a further tube of metal enclosing said layers of wires, and a sheath of an insulating material laying about said further metal tube.
Claim 2
Dependent Claim
87 words
An optical fiber cable including a central cylindrical strength member, a plurality of coated optical fibers laying about the surface of said strength member, a layer of thermoplastic or rubber-like material enclosing the optical fibers, a metallic tube enclosing and laying about said layer, said tube being usable as an electrical conductor, a layer of high tensile steel wires laying about said metallic tube, a further tube of metal enclosing said layers of wires, and a sheath of an insulating material laying about said further metal tube.
Claim 3
Dependent Claim
50 words
A cable as claimed in claim 1, which also includes a tubular layer of a bedding material laying about said layer of insulating material, a layer of armouring wires laying about said layer of bedding material, and a layer of a binding material laying about and enclosing said armouring wires.
Claim 4
Dependent Claim
21 words
A cable as claimed in claim 1 or 2, and in which the central strength member is an assembly of fibers.
Claim 5
Dependent Claim
27 words
A cable as claimed in claim 1 or 2, and in which the central strength member is a steel strength member coated with an electrically insulating material.
References Cited (Backward Citations)
GB1172272A
Cited
US4097119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |