US3828116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable corona ring and cable termination method employing same
Assignee: Ericsson Inc
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Filing: 1973-09-28
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Granted: 1974-08-06
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Expires: 1993-09-28
Abstract
Abstract To terminate high voltage cables for testing, an infaltable tubuar annulus such as the inner tube of a tire, but with a corona resistant outer surface, is applied as a corona ring at the line where the shielding is cut from the cable insulation.
Inventors
- 👤 M Lonow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:20
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/02; H02G15/06; H02G15/064; H02G15/068; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; H02G1/00; H02G1/14; Y; Y10; Y10S; Y10S277/00; Y10S277/92; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A corona ring for terminating a shield of a high voltage cable comprising: A. an inflatable rubber-like tubular annulus, a. said tubular annulus having an inner diameter sufficient for fitting over said shield, said tubular annulus being deflated, b. said tubular annulus having an outer surface highly resistant to degradation by corona, c. substantially said entire surface comprising a wrapping of corona resistant tape, and B. means limiting the outer diameter of said tubular annulus whereby said tubular annulus will tighten over said cable upon inflation.
Claim 2
Dependent Claim
86 words
A corona ring for terminating a shield of a high voltage cable comprising: A. an inflatable rubber-like tubular annulus, a. said tubular annulus having an inner diameter sufficient for fitting over said shield, said tubular annulus being deflated, b. said tubular annulus having an outer surface highly resistant to degradation by corona, c. substantially said entire surface comprising a wrapping of corona resistant tape, and B. means limiting the outer diameter of said tubular annulus whereby said tubular annulus will tighten over said cable upon inflation.
Claim 3
Dependent Claim
85 words
A corona ring for terminating a shield of a high voltage cable comprising: A. an inflatable rubber-like tubular annulus, a. said tubular annulus having an inner diameter sufficient for fitting over said shield, said tubular annulus being deflated, b. said tubular annulus having an outer surface highly resistant to degradation by corona, c. substantially said entire surface comprising an adherent corona resistant coating, and B. means limiting the outer diameter of said tubular annulus whereby said tubular annulus will tighten over said cable upon inflation.
Claim 4
Dependent Claim
85 words
A corona ring for terminating a shield of a high voltage cable comprising: A. an inflatable rubber-like tubular annulus, a. said tubular annulus having an inner diameter sufficient for fitting over said shield, said tubular annulus being deflated, b. said tubular annulus having an outer surface highly resistant to degradation by corona, c. substantially said entire surface comprising an adherent corona resistant coating, and B. means limiting the outer diameter of said tubular annulus whereby said tubular annulus will tighten over said cable upon inflation.
Claim 5
Independent Claim
117 words
The method of terminating a high voltage cable comprising a conductor, a wall of insulation surrounding said conductor, and a layer of electrical shielding covering said wall, comprising the steps of: A. removing said shielding from an end length of said cable, thereby exposing a dielectric surface of said insulation having high electrical surface resistance extending from an end of said cable to a termination of said shielding, B. fitting an inflatable tubular annulus having a corona resistant surface over said end, positioning said annulus at a location where, when inflated, it will contact said shielding, and C. inflating said tubular annulus at said termination thereby bringing said surface in contact with said shielding at said termination.
Claim 6
Independent Claim
117 words
The method of terminating a high voltage cable comprising a conductor, a wall of insulation surrounding said conductor, and a layer of electrical shielding covering said wall, comprising the steps of: A. removing said shielding from an end length of said cable, thereby exposing a dielectric surface of said insulation having high electrical surface resistance extending from an end of said cable to a termination of said shielding, B. fitting an inflatable tubular annulus having a corona resistant surface over said end, positioning said annulus at a location where, when inflated, it will contact said shielding, and C. inflating said tubular annulus at said termination thereby bringing said surface in contact with said shielding at said termination.
Claim 7
Dependent Claim
21 words
The method of claim 3 comprising the step of fitting a rigid rim over said tubular annulus during the inflation thereof.
Claim 8
Independent Claim
128 words
The method of terminating a high voltage cable comprising a conductor, a wall of insulation surrounding said conductor, and a layer of electrical shielding covering said wall, comprising the steps of: A. removing said shielding from an end length of said cable, thereby exposing a dielectric surface of said insulation having high electrical surface resistance, extending from an end of said cable to a termination of said shielding, B. inflating a resilient tubular annulus, having a corona resistant surface and means limiting the outer diameter of said annulus, to an inner diameter slightly less than the diameter over said shielding, and C. passing said annulus over said cable by outwardly compressing said inner diameter to a section of said cable in contact with said shielding at said termination.
Claim 9
Independent Claim
128 words
The method of terminating a high voltage cable comprising a conductor, a wall of insulation surrounding said conductor, and a layer of electrical shielding covering said wall, comprising the steps of: A. removing said shielding from an end length of said cable, thereby exposing a dielectric surface of said insulation having high electrical surface resistance, extending from an end of said cable to a termination of said shielding, B. inflating a resilient tubular annulus, having a corona resistant surface and means limiting the outer diameter of said annulus, to an inner diameter slightly less than the diameter over said shielding, and C. passing said annulus over said cable by outwardly compressing said inner diameter to a section of said cable in contact with said shielding at said termination.
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |