US3800414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a hollow composite superconducting structure
Assignee: Airco Inc
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Filing: 1972-10-12
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Granted: 1974-04-02
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Expires: 1992-10-12
Abstract
Abstract A core element comprising superconducting strands in a normally conducting matrix is initially extruded in a desired crosssectional shape or configuration; and is then interposed in a prefabricated or postfabricated tube, and coreduced to a final product of desired dimensions, thus providing a matrix having a plurality of longitudinal internal channels. The core elements may assume a variety of cross-sectional shapes, such as ribbon, square, cross, triangle, star, annulus, etc., or a composite of these. In an alternative process, a cable is formed by twisting or braiding together a plurality of superconducting matrix wires, prior to coreduction in a prefabricated or postfabricated tube. In another form, a superconducting matrix strip is welded to form a tube. In a variation of this, superconductor wires are interposed in longitudinal slots in a billet of normally conducting material which is rolled into a ribbon, alternatively formed into a tube. The product of any of these techniques is finally coreduced to a wire which is formed into a coil which may be cooled internally by a forced cooling system including fluid or superfluid helium.
Inventors
- 👤 W Shattes
- 👤 W Marancik
- 👤 B Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:18
CPC Classifications
H; H01; H01B; H01B12/00; H01B12/02; H01B12/10; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/928; Y10S505/93; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
The method of forming internally channelled superconducting wire which comprises the steps of: preforming a matrix of normally conducting material containing a plurality of strands of superconducting material by mechanically reducing said matrix into a structure of preselected cross-sectional shape having an elongation in one dimension which exceeds said cross-sectional dimension by many orders of magnitude, wherein the said strands run substantially parallel to said principal direction of elongation, utilizing material comprising said preformed matrix as a core element and an outer tube of normal material to form a tubular composite containing a channel in said direction of elongation, and further reducing said tubular composite to channelled wire of a preselected cross-section.
Claim 2
Independent Claim
112 words
The method of forming internally channelled superconducting wire which comprises the steps of: preforming a matrix of normally conducting material containing a plurality of strands of superconducting material by mechanically reducing said matrix into a structure of preselected cross-sectional shape having an elongation in one dimension which exceeds said cross-sectional dimension by many orders of magnitude, wherein the said strands run substantially parallel to said principal direction of elongation, utilizing material comprising said preformed matrix as a core element and an outer tube of normal material to form a tubular composite containing a channel in said direction of elongation, and further reducing said tubular composite to channelled wire of a preselected cross-section.
Claim 3
Dependent Claim
23 words
The method in accordance with claim 1 wherein said preformed matrix is twisted prior to utilizing said matrix to form said tubular composite.
Claim 4
Dependent Claim
44 words
The method in accordance with claim 2 wherein said outer tube is of substantially larger cross-section in at least one direction than the cross-sectional dimension of said preformed matrix, and said outer tube is sink drawn to form a composite with said core element.
Claim 5
Dependent Claim
41 words
The method in accordance with claim 2 wherein a preselected shape from the group of shapes including ribbon, cruciform, polygon, annular, or a combination of these is impressed on said preformed core element prior to interposing said core in said tube.
Claim 6
Dependent Claim
61 words
The method in accordance with claim 3 wherein said core element is preformed as a ribbon of normal and superconducting material clamped between two semiannular inner tube halves comprising normally conducting material to form a tubular element having a pair of substantially symmetrically disposed longitudinal channels, and said tubular element is interposed in an outer tube which is sink drawn thereto.
Claim 7
Dependent Claim
22 words
The method in accordance with claim 5 wherein said inner tube halves are formed of a matrix of normal and superconductive material.
Claim 8
Dependent Claim
26 words
The method in accordance with claim 3 wherein said outer tube is formed by laminating an inner layer of copper to a peripheral layer of steel.
Claim 9
Dependent Claim
40 words
The method in accordance with claim 3 wherein said outer tube is formed by laminating to a peripheral layer of steel an inner layer comprising said prereduced matrix of normally conducting material containing a plurality of strands of superconducting material.
Claim 10
Dependent Claim
23 words
The method in accordance with claim 8 wherein said inner layer of prereduced matrix material is twisted prior to forming said outer tube.
Claim 11
Dependent Claim
31 words
The method in accordance with claim 3 wherein said core element is preformed as a braid of a plurality of twisted strands comprising said preformed matrix of normal and superconducting material.
Claim 12
Dependent Claim
28 words
The method in accordance with claim 10 wherein said braid is formed about a central axial element substantially larger in diameter than the other components of said braid.
Claim 13
Dependent Claim
14 words
The method in accordance with claim 11 wherein said central axial element is tubular.
Claim 14
Dependent Claim
103 words
The method in accordance with claim 3 wherein said enclosing tube is formed by the steps comprising: preforming wire comprising a plurality of superconductive strands in a matrix of normally conductive material, forming a plurality of substantially parallel longitudinal slots in a slab of normally conducting material, interposing pieces of said preformed wire in a plurality of said slots, rolling said slab including said wire pieces to substantially reduce the cross-sectional dimension of said slab, forming said tube by welding together the longitudinal edges of said rolled slab, and further reducing the cross-section of said tube to form said internally channelled superconducting wire.
Claim 15
Dependent Claim
20 words
The method in accordance with claim 13 wherein said wire is twisted prior to interposing said wire in said slots.
Claim 16
Dependent Claim
36 words
The method in accordance with claim 13 wherein said wire pieces are coated with an undercoating of copper, an intermediate coating of cupro-nickel, and an outer coating of copper, prior to being interposed in said slots.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |