US4552433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fibre cable manufacture
Assignee: Nortel Networks Ltd
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Filing: 1983-09-21
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Granted: 1985-11-12
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Expires: 2003-09-21
Abstract
Abstract A cabling machine for making single optical fibre cable with two layers of stranded armid yarn enclosed in a yarn outer wrap which employs a vertical axis for cabling and uses peripheral pay-off of the aramid yarn (34,39) from bobbins 33 mounted on a pair of separately driven turntables (21,22) and peripheral pay-off of the yarn wrap (45) from a spool (44).
Inventors
- 👤 James G. Titchmarsh
- 👤 Peter G. Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/449; D; D07; D07B; D07B3/00; D07B3/02; D07B3/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/2964
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A single fibre optical cable that can be dispensed under water in which a glass optical fibre having an internal optical waveguiding structure forms the central core of the cable, and is encased in two or more plastic coatings the first of which is applied to the optical fibre to form a plastics packaged optical fibre, around which are stranded in opposite senses first and second layers of high modulus plastics yarns, the cable being completed by a liquid permeable outer wrap of yarn with adjacent abutting or overlapping turns.
Claim 2
Dependent Claim
90 words
A single fibre optical cable that can be dispensed under water in which a glass optical fibre having an internal optical waveguiding structure forms the central core of the cable, and is encased in two or more plastic coatings the first of which is applied to the optical fibre to form a plastics packaged optical fibre, around which are stranded in opposite senses first and second layers of high modulus plastics yarns, the cable being completed by a liquid permeable outer wrap of yarn with adjacent abutting or overlapping turns.
Claim 3
Dependent Claim
15 words
A cable as claimed in claim 1, wherein the yarns is made of aramid fibre.
Claim 4
Dependent Claim
14 words
A cable as claimed in claim 1 wherein the internal waveguiding structure comprises silica.
Claim 5
Dependent Claim
31 words
A cable as claimed in claim 1, wherein the relative number and lay lengths of the yarns in the first and second layers is such as to provide substantial torque balance.
Claim 6
Dependent Claim
16 words
A cable as claimed in claim 4, wherein the outer yarn is made of crimped fibre.
References Cited (Backward Citations)
CA1125554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |