US3865968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminators for electrical superconductor cable installations
Assignee: Kabel Rheydt AG
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Filing: 1973-10-02
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Granted: 1975-02-11
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Expires: 1993-10-02
Abstract
Abstract A terminator (which terminator includes a cable fitting which terminates a superconductor cable but which leads, instead of to a lead-out bolt, for example to a standard conductor of an adjoining cable) for an electrical superconductor cable installation, has a zone of temperature increase from superconductor to normal conductor in the direction of the terminator longitudinal axis, separated from the zone of electrical field reduction. Advantageously, the temperature increase zone, which contains a heat-exchange system, is disposed outside, preferably below, the terminator external insulator surrounding the normal conductor.
Inventors
- 👤 Heinz Heumann
- 👤 Helmut Kuhmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:35
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/34; H02G15/20; H02G15/22; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885; Y10S505/886
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
In a terminator for an electrical superconductor cable installation, the terminator including a normal conductor, an external insulator surrounding the normal conductor and arranged to be disposed in an ambient temperature environment, a superconductor cable including a conductor and means maintaining the conductor at a temperature at which it is superconductive, and heat-exchange means defining a zone of temperature increase between the conductor of the superconductor cable and the normal conductor, the terminator presenting a longitudinal axis along which the heat-exchange means are interposed between the conductor of the superconductor cable and the normal conductor, the improvement wherein: said terminator further comprises means defining a zone of electrical field reduction; said electrical field reduction zone is separated from said zone of temperature increase; and said zone of temperature increase is located axially outside of the region occupied by said external insulator.
Claim 2
Dependent Claim
141 words
In a terminator for an electrical superconductor cable installation, the terminator including a normal conductor, an external insulator surrounding the normal conductor and arranged to be disposed in an ambient temperature environment, a superconductor cable including a conductor and means maintaining the conductor at a temperature at which it is superconductive, and heat-exchange means defining a zone of temperature increase between the conductor of the superconductor cable and the normal conductor, the terminator presenting a longitudinal axis along which the heat-exchange means are interposed between the conductor of the superconductor cable and the normal conductor, the improvement wherein: said terminator further comprises means defining a zone of electrical field reduction; said electrical field reduction zone is separated from said zone of temperature increase; and said zone of temperature increase is located axially outside of the region occupied by said external insulator.
Claim 3
Dependent Claim
19 words
A terminator as defined in claim 1 wherein said zone of temperature increase is disposed below said external insulator.
Claim 4
Dependent Claim
62 words
A terminator as defined in claim 1 further comprising an insulating member disposed around said conductor of said superconductor cable and located near the end thereof which is adjacent said heat-exhange means, and a tubular break-down proof insulation surrounding said normal conductor, disposed within said external insulator, and extending around said heat-exchange means and at least a portion of said insulating member.
Claim 5
Dependent Claim
23 words
A terminator as defined in claim 3 further comprising means defining a plurality of hollow concentric cold-insulating chambers surrounding said temperature increase zone.
Claim 6
Dependent Claim
20 words
A terminator as defined in claim 4 wherein said cold-insulating chambers are arranged to be maintained at respectively different temperatures.
Claim 7
Dependent Claim
44 words
A terminator as defined in claim 4 further comprising means defining refrigerant inlets supplying the region surrounding said conductor of said superconductor cable and said cold-insulating chambers and located adjacent that end of said insulating member which is directed away from said normal conductor.
Claim 8
Dependent Claim
39 words
A terminator as defined in claim 1 further comprising a mass of insulating material occupying a region surrounding said conductor of said superconductor cable, said mass of insulation being constituted by helium and being free of any solid material.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |