US3767835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pothead termination comprising a vapor condenser and a tubular conductor extension containing a vaporizable liquid, and method
Assignee: Ericsson Inc
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Filing: 1972-06-07
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Granted: 1973-10-23
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Expires: 1992-06-07
Abstract
Abstract A pothead for a high voltage cable, which may be of the type with a central pilot wire for monitoring the temperature of the cable conductor, comprises an electrically conducting tubular member compressed onto the cable conductor, a liquid condenser mounted outside the pothead insulator and a volatile liquid within the tubular member. The condenser may have radial fins in proximity to a corona ring and be surmounted by a temperature monitor and radio transmitter.
Inventors
- 👤 J Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:28
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/20; H02G15/22; H02G15/08; H02G15/10; H02G15/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
A pothead, comprising an insulator, for a high-voltage cable, said cable comprising a conductor and a thick wall of insulation surrounding said conductor, comprising: A. entrance means into said pothead for said cable having said wall of insulation, B. an electrically conducting tubular member positioned to extend upwardly within said pothead, C. a liquid vaporizable at the operating temperature of said pothead at least partially filling said member, D. means for mechanically and electrically joining said member to said cable conductor within said pothead, and E. condensing means for said liquid, exterior to said insulator, communicating with said member.
Claim 2
Dependent Claim
99 words
A pothead, comprising an insulator, for a high-voltage cable, said cable comprising a conductor and a thick wall of insulation surrounding said conductor, comprising: A. entrance means into said pothead for said cable having said wall of insulation, B. an electrically conducting tubular member positioned to extend upwardly within said pothead, C. a liquid vaporizable at the operating temperature of said pothead at least partially filling said member, D. means for mechanically and electrically joining said member to said cable conductor within said pothead, and E. condensing means for said liquid, exterior to said insulator, communicating with said member.
Claim 3
Dependent Claim
21 words
The pothead of claim 1 wherein said joining means comprises a sleeve extending from said member and compressible over said conductor.
Claim 4
Dependent Claim
20 words
The pothead of claim 1 comprising a downwardly extending length of tubing within said member for condensate from said liquid.
Claim 5
Dependent Claim
40 words
The pothead of claim 1 wherein said condensing means comprises a plurality of radial fins and comprising a corona ring adjacent to said fins, said ring having an outer radius at least equal to the radial extension of said fins.
Claim 6
Dependent Claim
123 words
A high-voltage termination comprising, in combination: A. a cable comprising a conductor and a thick wall of insulation surrounding said conductor, B. a pothead comprising an insulator, C. entrance means into said pothead for said cable, said cable being surrounded by said wall of insulation, D. an electrically conducting tubular member positioned to extend upwardly within said pothead, E. a liquid vaporizable at the operating temperature of said pothead, at least partially filling said member, F. means mechanically and electrically joining said member to said conductor within said pothead, G. condensing means for said liquid exterior to said insulator and communicating with said member, and H. wrappings within said insulator forming a continuous wall of electrical insulation over said conductor and said member.
Claim 7
Dependent Claim
123 words
A high-voltage termination comprising, in combination: A. a cable comprising a conductor and a thick wall of insulation surrounding said conductor, B. a pothead comprising an insulator, C. entrance means into said pothead for said cable, said cable being surrounded by said wall of insulation, D. an electrically conducting tubular member positioned to extend upwardly within said pothead, E. a liquid vaporizable at the operating temperature of said pothead, at least partially filling said member, F. means mechanically and electrically joining said member to said conductor within said pothead, G. condensing means for said liquid exterior to said insulator and communicating with said member, and H. wrappings within said insulator forming a continuous wall of electrical insulation over said conductor and said member.
Claim 8
Dependent Claim
29 words
The termination of claim 5 comprising a stress relief cone extending upwardly over said cable, said joining means, and at least a portion of said member containing said liquid.
Claim 9
Dependent Claim
42 words
The termination of claim 5 wherein said joining means comprises a sleeve extending from said member and compressed over said conductor, said cable comprises temperature monitoring means and said sleeve comprises a wall defining an opening leading to said temperature monitoring means.
Claim 10
Dependent Claim
20 words
The termination of claim 7 comprising a radio transmitter mounted above said condensing means for signals from said monitoring means.
Claim 11
Dependent Claim
21 words
The termination of claim 5 wherein said joining means comprises a sleeve extending from said member and compressed over said conductor.
Claim 12
Dependent Claim
48 words
The termination of claim 9 wherein said cable comprises an insulated pilot wire, said sleeve comprises a wall defining an opening for said pilot wire and said member comprises an external lengthwise groove for said piloT wire, said pilot wire being positioned in said groove under said wrappings.
Claim 13
Dependent Claim
22 words
The termination of claim 10 comprising temperature monitoring means sensitive to the resistance of said pilot wire, mounted above said condensing means.
Claim 14
Dependent Claim
17 words
The termination of claim 11 comprising a radio transmitter mounted therewith for signals from said monitoring means.
Claim 15
Dependent Claim
24 words
The termination of claim 5 comprising temperature monitoring means and a radio transmitter mounted above said condensing means for signals from said monitoring means.
Claim 16
Independent Claim
146 words
The method of terminating a high-voltage electric cable comprising the steps of: A. exposing a substantial length of the core of said cable, including insulation shielding, beyond the sheath of said cable, B. removing sufficient insulation to expose a length of the end of the conductor of said cable, C. mechanically and electrically connecting an electrically conducting tubular member to said end, D. wrapping insulation around said member to the diameter of the insulation on said cable, E. building a stress relief cone extending from said shielding over said core, F. positioning a pothead over said member and the exposed length of said core, G. fitting a vapor condenser communicating with said member to said pothead, H. at least partially filling said member with a liquid vaporizable at the operating temperature of said pothead, I. filling said pothead with dielectric fluid, and J. sealing said pothead.
Claim 17
Independent Claim
146 words
The method of terminating a high-voltage electric cable comprising the steps of: A. exposing a substantial length of the core of said cable, including insulation shielding, beyond the sheath of said cable, B. removing sufficient insulation to expose a length of the end of the conductor of said cable, C. mechanically and electrically connecting an electrically conducting tubular member to said end, D. wrapping insulation around said member to the diameter of the insulation on said cable, E. building a stress relief cone extending from said shielding over said core, F. positioning a pothead over said member and the exposed length of said core, G. fitting a vapor condenser communicating with said member to said pothead, H. at least partially filling said member with a liquid vaporizable at the operating temperature of said pothead, I. filling said pothead with dielectric fluid, and J. sealing said pothead.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |