US3829964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-filament composite superconductor with transposition of filaments and method of making same
Assignee: Airco Inc
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Filing: 1973-09-11
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Granted: 1974-08-20
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Expires: 1993-09-11
Abstract
Abstract A multi-filament superconducting composite composed of a plurality of segments that is intrinsically stable. The individual segments are multi-filament composites that have been twisted after assembly and mechanical working and thereafter subsequently deformed. The deformed segments can be triangular or rectangular and are assembled into a second composite. After assembly the second composite is once again twisted. This second twisting transposes the filaments within the segments, thereby producing a superconductor that is resistant to flux jumps induced by self-field losses.
Inventors
- 👤 P Critchlow
- 👤 B Zeitlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/926; Y10S505/927; Y10S505/928; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method for producing intrinsically stable superconducting wire comprising the steps: a. assembling a first composite by inserting rods of a superconductive alloy in a matrix of normal material; b. working said composite so as to substantially reduce the diameter of said composite and form filaments of said superconductive alloy rods; c. twisting said composite at a rate from about one-half turns to about five turns per linear inch of said composite; d. forming said composite into a segment by passing said composite through forming rolls; e. assembling a second composite by arranging a plurality of said segments in a geometric configuration; and f. twisting said second composite so as to transpose said superconductive filaments so that the filaments substantially share equally the cross-section of said segments.
Claim 2
Independent Claim
127 words
A method for producing intrinsically stable superconducting wire comprising the steps: a. assembling a first composite by inserting rods of a superconductive alloy in a matrix of normal material; b. working said composite so as to substantially reduce the diameter of said composite and form filaments of said superconductive alloy rods; c. twisting said composite at a rate from about one-half turns to about five turns per linear inch of said composite; d. forming said composite into a segment by passing said composite through forming rolls; e. assembling a second composite by arranging a plurality of said segments in a geometric configuration; and f. twisting said second composite so as to transpose said superconductive filaments so that the filaments substantially share equally the cross-section of said segments.
Claim 3
Dependent Claim
18 words
A method as recited in claim 1 wherein said segments are bonded together before twisting said second segment.
Claim 4
Dependent Claim
18 words
A method as recited in claim 2 wherein said segments are passed through a molten bath of solder.
Claim 5
Dependent Claim
14 words
A method as recited in claim 2 wherein said segments are ultrasonically welded together.
Claim 6
Dependent Claim
14 words
A method as recited in claim 1 wherein said segments are traingular in cross-section.
Claim 7
Dependent Claim
14 words
A method as recited in claim 1 wherein said segments are rectangular in cross-section.
Claim 8
Dependent Claim
27 words
A method as recited in cLaim 1 wherein said second composite is twisted at a rate from about one-half turn to about five turns per linear inch.
References Cited (Backward Citations)
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |