Patent US5798678A successfully refreshed from Google Patents.
US5798678A
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US
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Superconducting wind-and-react-coils and methods of manufacture
Assignee: American Superconductor Corp
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Filing: 1996-07-01
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Granted: 1998-08-25
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Expires: 2016-07-01
Abstract
Abstract A process for manufacturing superconducting magnetic coils from strain-tolerant, superconducting multi-filament composite conductors is described. The method involves winding the precursor to a multi-filament composite conductor and an insulating material or its precursor around a mandrel in order to form a coil, and then exposing the coil to high temperatures and an oxidizing environment. The insulating material or its precursor is chosen to permit exposure of the superconductor precursor filaments to the oxidizing environment, and to encase the matrix-forming material enclosing the filaments, which is reversibly weakened during processing.
Inventors
- 👤 Michael D. Manlief
- 👤 Gilbert N. Riley, Jr.
- 👤 John Voccio
- 👤 Anthony J. Rodenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; H01F27/00; H01F27/28; H01F27/2804; H01F27/2819; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/061; H01F41/063; H01F41/064; H01F41/069; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/705; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A superconducting magnetic coil comprising: a multi-layer coil of a multi-filament composite conductor comprising multiple superconducting filaments enclosed in a matrix-forming material, each of the filaments extending the length of the multi-filament composite conductor, said multi-filament composite conductor formed into said multi-layer coil being subjected to a bend strain in excess of the critical strain of said multi-filament composite conductor when in a reacted state, said multi-filament composite conductor having a minimum critical-current of 1.2 Amperes.
Claim 2
Dependent Claim
76 words
A superconducting magnetic coil comprising: a multi-layer coil of a multi-filament composite conductor comprising multiple superconducting filaments enclosed in a matrix-forming material, each of the filaments extending the length of the multi-filament composite conductor, said multi-filament composite conductor formed into said multi-layer coil being subjected to a bend strain in excess of the critical strain of said multi-filament composite conductor when in a reacted state, said multi-filament composite conductor having a minimum critical-current of 1.2 Amperes.
Claim 3
Dependent Claim
18 words
The superconducting magnetic coil of claim 1, wherein said multi-filament composite conductor is surrounded by an insulating layer.
Claim 4
Dependent Claim
29 words
The superconducting magnetic coil of claim 2, wherein said insulating layer comprises an insulating material permeable to gaseous oxygen and substantially chemically inert relative to said multi-filament composite conductor.
Claim 5
Dependent Claim
14 words
The superconducting magnetic coil of claim 3, wherein said insulating material comprises ceramic fibers.
Claim 6
Dependent Claim
32 words
The superconducting magnetic coil of claim 4, wherein said ceramic fibers are composed primarily of ceramic materials selected from the group comprising SiO 2 , Al 2 O 3 , and zirconia.
Claim 7
Dependent Claim
19 words
The superconducting magnetic coil of claim 5, wherein said insulating material has a thickness between 10 and 150 μm.
Claim 8
Dependent Claim
15 words
The superconducting magnetic coil of claim 3, wherein said insulating material comprises a particulate material.
Claim 9
Dependent Claim
31 words
The superconducting magnetic coil of claim 7, wherein said particulate material is a ceramic material selected from a group comprising Al 2 O 3 , MgO, SiO 2 , and zirconia.
Claim 10
Dependent Claim
20 words
The superconducting magnetic coil of claim 8, wherein the thickness of said insulating layer is between 10 and 150 μm.
Claim 11
Dependent Claim
29 words
The superconducting magnetic coil of claim 1, wherein each layer of said coil comprises multiple multi-filament composite conductors, said multiple multi-filament composite conductors surrounded by a single insulating layer.
Claim 12
Dependent Claim
27 words
The superconducting magnetic coil of claim 1 wherein said matrix-forming material is selected from a group comprising a noble metal and an alloy of a noble metal.
Claim 13
Dependent Claim
13 words
The superconducting magnetic coil of claim 11, wherein said noble metal is silver.
Claim 14
Dependent Claim
21 words
The superconducting magnetic coil of claim 1, wherein said superconducting filaments are comprised of materials selected from the oxide superconducting family.
Claim 15
Dependent Claim
20 words
The superconducting magnetic coil of claim 13, wherein said superconducting filaments are composed primarily of the three-layer phase of BSCCO.
Claim 16
Dependent Claim
15 words
The superconducting magnetic coil of claim 1, wherein said coil is impregnated with a polymer.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-08-24 | 2002-02-23 | 2002-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-24 | 2006-02-23 | 2006-08-25 | $3760.00 | Window Closed / Lapsed |
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