Patent US3940848A successfully refreshed from Google Patents.
US3940848A
Expired / Lapsed
US
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Method for the manufacture of tubular conductors
Assignee: Siemens AG
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Filing: 1974-01-28
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Granted: 1976-03-02
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Expires: 1994-01-28
Abstract
Abstract A method for manufacturing tubular conductors which consist of a niobium layer and a layer of normal electrically conducting metal in which a copper body of rectangular cross section is covered with niobium on one wide and two narrow sides by means of fusion electrolysis and the resulting body then rolled to form a ribbon which is then bent to form a tube with the niobium flanges at the two edges of the ribbon abuting and welded together by electron beam welding. Tubular conductors made according to the method of the present invention are particularly suited for use as superconducting cables.
Inventors
- 👤 Heinrich Diepers
- 👤 Otto Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:41
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0156; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/927; Y10S505/928; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
An improved method for manufacturing tubular conductors which consist of a niobium layer and a layer of normal conducting metal in which a ribbon consisting of the two layers and having its edges, niobium flanges is first fabricated, after which the ribbon is bent to form a tube so that the niobium flanges at both edges abut, which flanges are then joined together, wherein the improvement comprises the steps of: a. plating a copper body using fusion electrolysis to form a niobium layer on one wide and two narrow sides; and b. rolling the body so formed to obtain a ribbon to be used in making the tubular conductor.
Claim 2
Dependent Claim
109 words
An improved method for manufacturing tubular conductors which consist of a niobium layer and a layer of normal conducting metal in which a ribbon consisting of the two layers and having its edges, niobium flanges is first fabricated, after which the ribbon is bent to form a tube so that the niobium flanges at both edges abut, which flanges are then joined together, wherein the improvement comprises the steps of: a. plating a copper body using fusion electrolysis to form a niobium layer on one wide and two narrow sides; and b. rolling the body so formed to obtain a ribbon to be used in making the tubular conductor.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein said body is formed into a ribbon by a cold rolling.
Claim 4
Dependent Claim
17 words
The method according to claim 1 wherein the step of rolling is carried out in several passes.
Claim 5
Dependent Claim
15 words
The method according to claim 2 wherein the rolling is carried out in several passes.
Claim 6
Dependent Claim
31 words
The method according to claim 1 wherein said step of plating is accomplished by using a trough shaped electrode which encloses only the sides of the copper body to be plated.
Claim 7
Dependent Claim
31 words
The method according to claim 2 wherein said step of plating is accomplished by using a trough shaped electrode which encloses only the sides of the copper body to be plated.
Claim 8
Dependent Claim
31 words
The method according to claim 3 wherein said step of plating is accomplished by using a trough shaped electrode which encloses only the sides of the copper body to be plated.
Claim 9
Dependent Claim
45 words
The method according to claim 1 wherein the step of plating is carried out by placing two copper bodies on top of each other and plating the two combined bodies on all sides and further including the step of separating the two bodies after plating.
Claim 10
Dependent Claim
45 words
The method according to claim 2 wherein the step of plating is carried out by placing two copper bodies on top of each other and plating the two combined bodies on all sides and further including the step of separating the two bodies after plating.
Claim 11
Dependent Claim
45 words
The method according to claim 3 wherein the step of plating is carried out by placing two copper bodies on top of each other and plating the two combined bodies on all sides and further including the step of separating the two bodies after plating.
References Cited (Backward Citations)
US2828251A
Cited
US3444058A
Cited
US3691031A
Cited
US3814673A
Cited
US3777368A
Cited
US3783503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |