US3564110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cables
Assignee: AT&T Inc
•
Filing: 1969-01-31
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Granted: 1971-02-16
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Expires: 1989-01-31
Abstract
Abstract Entry of water and water vapor into the core and splice case of a cable is avoided, despite the puncturing effect of lightning, by surrounding the core with an overlapped-seam plastic-coated aluminum vapor barrier which is bonded to a surrounding polyethylene tube thick enough to withstand the inner radial force of a sealing gland in a splice case without distorting and leaking. Surrounding this tube and vapor barrier, to protect them from the effects of lightning, is a lightning-absorbing aluminum shield and an outer polyethylene jacket.
Inventors
- 👤 Merle C Biskeborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:18
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/10; H02G15/117; H01; H01B; H01B11/00; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/2825; H02G15/013
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
191 words
A cable system comprising a plurality of cable lengths, splice means connecting said cabLe lengths; each of said cable lengths including a core of communications-carrying conductor means for transmitting messages electrically, longitudinally seamed vapor barrier means surrounding said core and having a metal layer, fluid-obstructing structural support means bonded to substantially the entire outer surface of said vapor barrier means and conforming to the shape of the outer surface of said vapor barrier means, said structural means including a plastic sheath, bonded on the inside to the vapor barrier means and having a smooth substantially unbroken and round outer periphery, said structural means being substantially thicker than said vapor barrier means and having a substantially greater resistance to radial distortion than said vapor barrier means, electroconductive means surrounding said structural means, and a plastic jacket surrounding said electroconductive means; said splice means including a substantially rigid splice case for forming a pressure sheath about said cable lengths, said case having first and second glands containing a puttylike sealing means for holding said cable lengths in position within said splice case, whereby a barrier against the axial flow of water is formed.
Claim 2
Dependent Claim
191 words
A cable system comprising a plurality of cable lengths, splice means connecting said cabLe lengths; each of said cable lengths including a core of communications-carrying conductor means for transmitting messages electrically, longitudinally seamed vapor barrier means surrounding said core and having a metal layer, fluid-obstructing structural support means bonded to substantially the entire outer surface of said vapor barrier means and conforming to the shape of the outer surface of said vapor barrier means, said structural means including a plastic sheath, bonded on the inside to the vapor barrier means and having a smooth substantially unbroken and round outer periphery, said structural means being substantially thicker than said vapor barrier means and having a substantially greater resistance to radial distortion than said vapor barrier means, electroconductive means surrounding said structural means, and a plastic jacket surrounding said electroconductive means; said splice means including a substantially rigid splice case for forming a pressure sheath about said cable lengths, said case having first and second glands containing a puttylike sealing means for holding said cable lengths in position within said splice case, whereby a barrier against the axial flow of water is formed.
Claim 3
Dependent Claim
44 words
A system as in claim 1 wherein said vapor barrier means comprise, in addition to said metal layer, two plastic outer layers adhering to opposite sides of said metal layer and forming an adhesive for bonding said vapor barrier means to said structural means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |