Patent US4635015A successfully refreshed from Google Patents.
US4635015A
Expired / Lapsed
US
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Switching device for shorting at least one superconducting magnet winding
Assignee: Siemens AG
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Filing: 1985-01-25
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Granted: 1987-01-06
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Expires: 2005-01-25
Abstract
Abstract A switching device for shorting at least one superconducting magnet winding contains at least two contacts which can be cooled by a cryogenic medium and joined together by means of an actuator in such a manner that a superconducting current path and a normally conducting current path which completely stabilizes the superconducting current path are developed. The switching device exhibits a relatively large ohmic resistance in its open switch state. To this end, a current path with at least one partially stabilized superconductor with a resistance of at least 200 ohms in the normally conducting state of the superconductor and which is always closed is provided. A predetermined number of turns of the partially stabilized superconductor is connected to a switchable heating device in thermal contact therewith and electrically insulated therefrom. In addition, at least two contacts of normally conducting material are provided, each of which can be connected to the magnet winding via an electric conductor. The normally conducting contacts are joined to the partially stabilized superconductor in such a manner that the sections of the superconductor extending between these contacts are connected in parallel, at least partially, by the contacts when the switch is closed.
Inventors
- 👤 Holger Franksen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:40
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/30; H10N60/35; H10N60/355; H01; H01H; H01H33/00; H01H33/002; H01H33/004; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/882
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
155 words
A switching device for shorting the ends of at least one superconducting magnet winding comprising: (a) a partially stabilized superconductor having a predetermined number of turns such that it forms a current path with a resistance at least 200 ohms in the normally conducting state adapted to have its ends connected to the ends of the winding; (b) a switchable heating device in thermal contact with and electrically insulated from said turns; (c) at least two contacts of normally conducting material, each of which is adapted to be connected to an end of the magnet winding via an electric conductor and to be cooled by a cryogenic medium; and (d) actuating means for joining the normally conducting contacts to the partially stabilized superconductor in such a manner that a plurality of sections of the superconductor extend between said contacts in parallel to thereby form a completely stabilized normally conducting path when said switch is closed.
Claim 2
Dependent Claim
155 words
A switching device for shorting the ends of at least one superconducting magnet winding comprising: (a) a partially stabilized superconductor having a predetermined number of turns such that it forms a current path with a resistance at least 200 ohms in the normally conducting state adapted to have its ends connected to the ends of the winding; (b) a switchable heating device in thermal contact with and electrically insulated from said turns; (c) at least two contacts of normally conducting material, each of which is adapted to be connected to an end of the magnet winding via an electric conductor and to be cooled by a cryogenic medium; and (d) actuating means for joining the normally conducting contacts to the partially stabilized superconductor in such a manner that a plurality of sections of the superconductor extend between said contacts in parallel to thereby form a completely stabilized normally conducting path when said switch is closed.
Claim 3
Dependent Claim
24 words
A switching device according to claim 1, wherein the current path developed by the partially stabilized superconductor has a minimum resistance of 300 ohms.
Claim 4
Dependent Claim
32 words
A switching device according to claim 2, wherein the cross-sectional area of normally conducting stabilizing material on the partially stabilized superconductor is at most equal to the cross-sectional area of superconducting material.
Claim 5
Dependent Claim
21 words
A switching device according to claim 3, wherein the turns of the partially stabilized superconductor are wound around the heating device.
Claim 6
Dependent Claim
31 words
A switching device according to claim 3, wherein said heating device has two plane flat sides, to which the correspondingly shaped flat sides of the contacts are joined during switch closure.
Claim 7
Dependent Claim
25 words
A switching device according to claim 5, wherein said heating device comprises an electrically insulating support plate, through which at least one heater line extends.
Claim 8
Dependent Claim
26 words
A switching device according to claim 6, and further including, completely stabilized superconducting conductors coupling said normally conducting contacts to the ends of the magnet winding.
Claim 9
Dependent Claim
34 words
A switching device according to claim 1, wherein the turns of the partially stabilized superconductor are disposed on a flat side of the heating device and the contacts are joined at said flat side.
Claim 10
Dependent Claim
32 words
A switching device according to claim 1, wherein the cross-sectional area of normally conducting stabilizing material on the partially stabilized superconductor is at most equal to the cross-sectional area of superconducting material.
Claim 11
Dependent Claim
21 words
A switching device according to claim 1, wherein the turns of the partially stabilized superconductor are wound around the heating device.
Claim 12
Dependent Claim
21 words
A switching device according to claim 2, wherein the turns of the partially stabilized superconductor are wound around the heating device.
Claim 13
Dependent Claim
31 words
A switching device according to claim 1, wherein said heating device has two plane flat sides, to which the correspondingly shaped flat sides of the contacts are joined during switch closure.
Claim 14
Dependent Claim
31 words
A switching device according to claim 2, wherein said heating device has two plane flat sides, to which the correspondingly shaped flat sides of the contacts are joined during switch closure.
Claim 15
Dependent Claim
31 words
A switching device according to claim 4, wherein said heating device has two plane flat sides, to which the correspondingly shaped flat sides of the contacts are joined during switch closure.
Claim 16
Dependent Claim
25 words
A switching device according to claim 1, wherein said heating device comprises an electrically insulating support plate, through which at least one heater line extends.
Claim 17
Dependent Claim
26 words
A switching device according to claim 2, and further including completely stabilized superconducting conductors coupling said normally conducting contacts to the ends of the magnet winding.
Claim 18
Dependent Claim
25 words
A switching device according to claim 3, wherein said heating device comprises an electrically insulating support plate, through which at least one heater line extends.
Claim 19
Dependent Claim
26 words
A switching device according to claim 1, and further including completely stabilized superconducting conductors coupling said normally conducting contacts to the ends of the magnet winding.
Claim 20
Dependent Claim
26 words
A switching device according to claim 4, and further including completely stabilized superconducting conductors coupling said normally conducting contacts to the ends of the magnet winding.
Claim 21
Dependent Claim
26 words
A switching device according to claim 3, and further including completely stabilized superconducting conductors coupling said normally conducting contacts to the ends of the magnet winding.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |