US4595898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound-superconducting coil
Assignee: Toshiba Corp
•
Filing: 1984-05-04
•
Granted: 1986-06-17
•
Expires: 2004-05-04
Abstract
Abstract A compound-superconducting coil of the type including a plurality of superconducting wires in a tube and forcing a coolant through the tube. The subject compound-superconducting coil comprises a plurality of compound-superconducting wires and a tube for receiving the plural wires. Void spaces are provided in the interior of the tube to allow for the passage of a coolant. The void fraction is 45% to 70% of the tube interior. The subject compound-superconducting coil, when brought to a superconducting condition, allows for the passage of a current whose magnitude accounts for at least 80% of a critical current observed when the wire is strain-free state.
Inventors
- 👤 Hachio Shiraki
- 👤 Satoru Murase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:28
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/887
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A compound-superconducting coil comprising: a plurality of wires including a plurality of compound-superconducting wires; and a wound tube which receives said plurality of wires and is provided with void spaces allowing for the passage of a coolant, and wherein the void fraction of the tube is 45% to 70%, and, in a superconducting condition, said coil allows for the passage of a current whose magnitude is at least 80% of a critical current observed before the wire is wound into a coil.
Claim 2
Dependent Claim
82 words
A compound-superconducting coil comprising: a plurality of wires including a plurality of compound-superconducting wires; and a wound tube which receives said plurality of wires and is provided with void spaces allowing for the passage of a coolant, and wherein the void fraction of the tube is 45% to 70%, and, in a superconducting condition, said coil allows for the passage of a current whose magnitude is at least 80% of a critical current observed before the wire is wound into a coil.
Claim 3
Dependent Claim
19 words
The compound-superconducting coil according to claim 1, wherein adjacent turns of said wound tube are insulated from each other.
Claim 4
Dependent Claim
29 words
The compound-superconducting coil according to claim 1, wherein said plurality wires jointly constitute a cable of 3 n ×6 structure wherein n denotes an integer of at least 2.
Claim 5
Dependent Claim
13 words
The compound-superconducting coil according to claim 3, wherein n denotes 2 to 5.
Claim 6
Dependent Claim
22 words
The compound-superconducting coil according to claim 1, wherein said plurality of wires includes a plurality of wires having ordinary electrical conducting properties.
Claim 7
Dependent Claim
27 words
The compound-superconducting coil according to claim 5, wherein about not more than 10% of said plurality of wires are constituted by wires having ordinary electrical conducting properties.
Claim 8
Dependent Claim
17 words
The compound-superconducting coil according to claim 1, wherein some of said compound superconducting wires are made hollow.
References Cited (Backward Citations)
DE1564722A1
Cited
GB1297513A
Cited
DE2029076A1
Cited
EP0014915A1
Cited
US4395584A
Cited
EP0045604A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |