US3775840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a composite conductor band for use in making a tubular superconductor
Assignee: Siemens AG
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Filing: 1972-08-10
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Granted: 1973-12-04
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Expires: 1992-08-10
Abstract
Abstract A method for producing a conductor band which includes a layer of niobium adjacent a layer of an electrically normal conducting metal and respective niobium chords defining the longitudinal edges of the band. The bimetal conductor band is produced by bending a niobium strip to have a U-shaped profile, at least approximately filling the space bounded by the inside surface of the U-shaped niobium strip with an electrically normal conducting metal, and then joining the normal conducting metal to the Ushaped niobium strip to form the band. The bimetal conductor band made in this manner is used in a method of producing a tubular conductor for superconducting cables and the like.
Inventors
- 👤 H Diepers
- 👤 H Musebeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/09; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/925; Y10S505/927; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
The method of claim 1 wherein the U-shaped niobium strip is at least approximately filled with copper as the electrically normal conducting material.
Claim 2
Dependent Claim
32 words
The method of claim 1 wherein the U-shaped niobium strip is at least approximately filled by laying a strip of normal conducting metal in the space bounded by the inside surface thereof.
Claim 3
Dependent Claim
34 words
The method of claim 3 wherein before bonding the normal conducting metal to the U-shaped niobium strip, the method comprises cleaning the respective surfaces of the niobium strip and strip of normal conducting metal.
Claim 4
Dependent Claim
27 words
The method of claim 4 wherein the respective surfaces of the niobium strip and the strip of normal conducting metal are cleaned by electrolytically polishing the same.
Claim 5
Dependent Claim
27 words
The method of claim 4 wherein the respective surfaces of the niobium strip and the strip of normal conducting metal are cleaned by chemically etching the same.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein after metallurgically bonding the normal conducting metal to the U-shaped niobium strip, the method comprises working the bimetal conductor band to impart thereto a narrower thickness.
Claim 7
Dependent Claim
17 words
The method of claim 7 wherein the bimetal conductor band is worked by means of cold rolling.
Claim 8
Dependent Claim
19 words
The method of claim 8 comprising alternately cold-rolling and heat-treating the bimetal conductor band a predetermined number of times.
References Cited (Backward Citations)
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Cited
US3591705A
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US3548078A
Cited
DE1952148A1
Cited
US3657466A
Cited
US3699647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |