Patent EP0273226A2 successfully refreshed from Google Patents.
US4602231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spaced stabilizing means for a superconducting switch
Assignee: General Atomics Corp
•
Filing: 1984-07-20
•
Granted: 1986-07-22
•
Expires: 2004-07-20
Abstract
Abstract A switch comprises a length of superconductive wire having a plurality of normally conductive stabilizing segments thereon.
Inventors
- 👤 John R. Purcell
- 👤 Yen-hwa Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/30; H10N60/35; H10N60/355; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/882
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A switch comprising: a length of superconductive material comprising a plurality of filaments and having a transition temperature; stabilizing means comprising a plurality of segments of normally conductive material spaced from one another along said length of superconductive material and in contact therewith so as to connect said filaments in parallel; and means for varying the temperature of said superconductive material between respective temperatures above and below its transition temperature.
Claim 2
Dependent Claim
70 words
A switch comprising: a length of superconductive material comprising a plurality of filaments and having a transition temperature; stabilizing means comprising a plurality of segments of normally conductive material spaced from one another along said length of superconductive material and in contact therewith so as to connect said filaments in parallel; and means for varying the temperature of said superconductive material between respective temperatures above and below its transition temperature.
Claim 3
Dependent Claim
35 words
A switch in accordance with claim 1 wherein each of said segments is about one inch in length and said segments are distributed along said length of superconductive material at intervals of about one foot.
Claim 4
Dependent Claim
20 words
A switch in accordance with claim 1 wherein said superconductive material is niobium-titanium and said normally conductive material is copper.
Claim 5
Dependent Claim
43 words
A switch in accordance with claim 1 wherein said means for varying the temperature of said superconductive material comprises an insulating enclosure substantially containing said length of superconductive material, and a heater disposed within said enclosure to transfer heat to said superconductive material.
Claim 6
Dependent Claim
19 words
A switch in accordance with claim 1 wherein said length of superconductive material is wound in a helical path.
Claim 7
Dependent Claim
18 words
A switch in accordance with claim 1 wherein said length of superconductive material comprises a multifilament superconductive wire.
Claim 8
Dependent Claim
19 words
A switch in accordance with claim 1 wherein said length of superconductive material is about 400 feet in length.
Claim 9
Dependent Claim
21 words
A switch in accordance with claim 1 further comprising an insulated core element, and wherein said superconductive material is wound thereon.
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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |