US3795758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage cable joint and heat sink sleeve for use therein
Assignee: Ericsson Inc
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Filing: 1973-06-08
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Granted: 1974-03-05
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Expires: 1993-06-08
Abstract
Abstract In a joint in high-voltage cables with aluminum conductors a finned sleeve serves as a heat sink for butt welding the conductors and becomes permanently welded to them. The sleeve has a radial projection that makes electrical contact with an electrostatic shield embedded in a thick-walled dielectric cylinder surrounding the weldment.
Inventors
- 👤 Mara J O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/10; H02G15/103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A joint connecting two high-voltage cables comprising aluminum conductors comprising: A. a weldment connecting abutted ends of said conductors, B. walls of cable insulation surrounding both of said conductors from points axially spaced from said weldment, C. a thick-walled dielectric cylinder surrounding said weldment and portions of said walls, D. a tubular electrostatic shield embedded in said cylinder and extending over a fraction of said portions, E. an inward radial projection from said shield through said cylinder, said projection being substantially displaced axially from the center of said shield, and from said weldment, F. a metal sleeve directly surrounding said conductors, 1. the metal of said sleeve being fused with said weldment, 2. said sleeve comprising an outward radial projection axially offset from said weldment, in electrical contact with said inward projection from said shield.
Claim 2
Dependent Claim
135 words
A joint connecting two high-voltage cables comprising aluminum conductors comprising: A. a weldment connecting abutted ends of said conductors, B. walls of cable insulation surrounding both of said conductors from points axially spaced from said weldment, C. a thick-walled dielectric cylinder surrounding said weldment and portions of said walls, D. a tubular electrostatic shield embedded in said cylinder and extending over a fraction of said portions, E. an inward radial projection from said shield through said cylinder, said projection being substantially displaced axially from the center of said shield, and from said weldment, F. a metal sleeve directly surrounding said conductors, 1. the metal of said sleeve being fused with said weldment, 2. said sleeve comprising an outward radial projection axially offset from said weldment, in electrical contact with said inward projection from said shield.
Claim 3
Dependent Claim
22 words
said sleeve comprising an outward radial projection axially offset from said weldment, in electrical contact with said inward projection from said shield.
Claim 4
Dependent Claim
22 words
said sleeve comprising an outward radial projection axially offset from said weldment, in electrical contact with said inward projection from said shield.
Claim 5
Dependent Claim
15 words
The joint of claim 1 wherein said sleeve comprises a plurality of radially projecting fins.
Claim 6
Dependent Claim
85 words
A sleeve for use as a combined heat sink and shield contacting means in a high voltage cable joint comprising, A. thick-walled metal cylinder, B. sloping walls defining a central open cut in said cylinder, said cut extending from one surface through said cylinder substantially past the diameter thereof, C. heat sink means extending from said cylinder on both sides of said cut, D. electrical contact means extending from said cylinder on one side of said cut beyond the extension of said heat sink means.
Claim 7
Dependent Claim
85 words
A sleeve for use as a combined heat sink and shield contacting means in a high voltage cable joint comprising, A. thick-walled metal cylinder, B. sloping walls defining a central open cut in said cylinder, said cut extending from one surface through said cylinder substantially past the diameter thereof, C. heat sink means extending from said cylinder on both sides of said cut, D. electrical contact means extending from said cylinder on one side of said cut beyond the extension of said heat sink means.
Claim 8
Dependent Claim
16 words
The sleeve of claim 3 wherein said heat sink means comprises a plurality of radial fins.
Claim 9
Dependent Claim
15 words
The sleeve of claim 3 wherein said heat sink means is integral with said cylinder.
Claim 10
Dependent Claim
16 words
The sleeve of claim 5 wherein said heat sink means comprises a plurality of radial fins.
Claim 11
Dependent Claim
10 words
The sleeve of claim 6 wherein said metal is aluminum.
Claim 12
Dependent Claim
10 words
The sleeve of claim 3 wherein said metal is aluminum.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |