Patent US4147406A successfully refreshed from Google Patents.
US4147406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber optic cable
Assignee: Cooper Industries LLC
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Filing: 1976-10-26
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Granted: 1979-04-03
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Expires: 1996-10-26
Abstract
Abstract A flexible fiber optic cable and method of making same are disclosed wherein one or more fiber optic bundles are cabled along the length of an axial strength member and a spiral cut nonmetallic tube is applied coaxially over the fiber optic core, followed by a thin walled jacket formed coaxially over the spiral cut tubing. The spiral tube and jacket form a protective jacketing which prevents crushing of the fiber optic elements while facilitating flexing of the cable.
Inventors
- 👤 Gene S. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:45
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
A flexible fiber optic cable comprising an elongate strength member, at least one fiber optic element carried by said elongate strength member and helically cabled along the length of said elongate strength member to establish a fiber optic core, and a protective nonmetallic tubular shield layer disposed coaxially along the length of said fiber optic core, said tubular shield layer consisting of a spirally cut integral continuous length axially homogeneous tube of high impact resistant nonmetallic material of uniform transverse cross-sectional area throughout its length spirally wound about said fiber optic core with adjacent helical convolutions in contacting relation when the axis of said cable is straight, said tubular shield being of sufficient radial strength to substantially prevent crushing of said fiber optic elements while facilitating flexing of the cable, said elongate strength member having greater tensile strength and lower elongation per unit length than said at least one fiber optic element so that the major portion of any axial load on said cable is substantially taken by said elongate strength member.
Claim 2
Dependent Claim
172 words
A flexible fiber optic cable comprising an elongate strength member, at least one fiber optic element carried by said elongate strength member and helically cabled along the length of said elongate strength member to establish a fiber optic core, and a protective nonmetallic tubular shield layer disposed coaxially along the length of said fiber optic core, said tubular shield layer consisting of a spirally cut integral continuous length axially homogeneous tube of high impact resistant nonmetallic material of uniform transverse cross-sectional area throughout its length spirally wound about said fiber optic core with adjacent helical convolutions in contacting relation when the axis of said cable is straight, said tubular shield being of sufficient radial strength to substantially prevent crushing of said fiber optic elements while facilitating flexing of the cable, said elongate strength member having greater tensile strength and lower elongation per unit length than said at least one fiber optic element so that the major portion of any axial load on said cable is substantially taken by said elongate strength member.
Claim 3
Dependent Claim
27 words
A fiber optic cable as defined in claim 1 wherein said elongate strength member is disposed axially of said cable and is made from a nonmetallic material.
Claim 4
Dependent Claim
27 words
A fiber optic cable as defined in claim 1 including a nonmetallic textile braid layer disposed coaxially between said fiber optic core and said coaxial spiral tube.
Claim 5
Dependent Claim
25 words
A fiber optic cable as defined in claim 1 including a jacket disposed coaxially about said spiral tubular shield along the length of said cable.
Claim 6
Dependent Claim
26 words
A flexible fiber optic cable as defined in claim 3 including a jacket disposed coaxially about said spiral tubular shield along the length of said cable.
References Cited (Backward Citations)
US3855897A
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DE2012293A1
Cited
US3766307A
Cited
GB1438074A
Cited
FR2291508A1
Cited
FR2294460A1
Cited
FR2296192A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |