Patent FR1474514A successfully refreshed from Google Patents.
Patent US4713878A successfully refreshed from Google Patents.
US4713878A
Expired / Lapsed
US
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Mold method for superconductive joint fabrication
Assignee: General Electric Co
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Filing: 1984-12-05
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Granted: 1987-12-22
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Expires: 2004-12-05
Abstract
Abstract A method for joining multifilamentary superconductive wire comprises disposing the ends of the wires in a hot liquid metal stripping bath for removal of the metal matrix. In particular, in the present invention the ends of the wires to be joined are agitated within this bath to assure complete removal of the metal matrix. The liberated superconductive filaments are then disposed in a solder bath and then inserted into a mold which is filled with hot liquid superconductive solder which is allowed to solidify around the filamentary conductors after which the mold is removed.
Inventors
- 👤 Robert C. Kumpitsch
- 👤 James P. Retersdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:23
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
63 words
A method for forming superconductive joints in multifilamentary superconductor wire embedded in a metal matrix, said method comprising the steps of: disposing the ends of the multifilamentary superconductor wires to be joined in a hot liquid metal stripping bath for removal of said metal matrix; removing said wire ends from said stripping bath; disposing said wire ends in a hot liquie superconductive solder;
Claim 2
Independent Claim
63 words
A method for forming superconductive joints in multifilamentary superconductor wire embedded in a metal matrix, said method comprising the steps of: disposing the ends of the multifilamentary superconductor wires to be joined in a hot liquid metal stripping bath for removal of said metal matrix; removing said wire ends from said stripping bath; disposing said wire ends in a hot liquie superconductive solder;
Claim 3
Dependent Claim
10 words
removing said wire ends from said hot liquid superconductive solder;
Claim 4
Dependent Claim
10 words
removing said wire ends from said hot liquid superconductive solder;
Claim 5
Dependent Claim
20 words
inserting said wire ends in a mold and filling said mold with hot liquid superconductive solder; and solidifying said solder.
Claim 6
Dependent Claim
20 words
inserting said wire ends in a mold and filling said mold with hot liquid superconductive solder; and solidifying said solder.
Claim 7
Dependent Claim
13 words
The method of claim 1 further comprising the step of removing said mold.
Claim 8
Dependent Claim
20 words
The method of claim 1 in which said wire ends are moved relative to said stripping bath while disposed therein.
Claim 9
Dependent Claim
19 words
The method of claim 1 in which said multifilamentary wire ends are twisted prior to insertion into said mold.
Claim 10
Dependent Claim
20 words
The method of claim 1 in which said mulitfilamentary wire ends are grouped together prior to insertion into said mold.
Claim 11
Dependent Claim
14 words
The method of claim 1 in which said hot liquid stripping bath comprises tin.
Claim 12
Dependent Claim
38 words
The method of claim 6 in which said superconductive wire to be joined comprises niobium-titanium in a copper matrix and in which said wire ends are disposed in said stripping bath for a period of approximately 45 minutes.
Claim 13
Dependent Claim
36 words
The method of claim 6 in which said superconductive wire to be joined comprises niobium-titanium in a copper-nickel matrix and said wire ends are disposed within said stripping bath for a period of approximately 180 minutes.
Claim 14
Dependent Claim
19 words
The method of claim 1 in which said hot liquid superconductive solder comprises a mixture of lead and bismuth.
Claim 15
Dependent Claim
35 words
The method of claim 9 in which said bismuth is present in amounts ranging from approximately 35% to 40% by weight and said lead is present in amounts from approximately 65% to 60% by weight.
Claim 16
Dependent Claim
37 words
The method of claim 10 in which said superconductive wire to be joined comprises niobium titanium in a copper matrix and said wire ends are disposed in said solder bath for a period of approximately 15 minutes.
Claim 17
Dependent Claim
38 words
The method of claim 10 in which said superconductive wire to be joined comprises niobium-titanium in a copper-nickel matrix and in which said wire ends are disposed in said solder bath for a period of approximately 45 minutes.
Claim 18
Dependent Claim
24 words
The method of claim 1 in which moving said wire is performed by relative rotational movement of said wire ends in said stripping bath.
Claim 19
Dependent Claim
16 words
The method of claim 1 in which said process is carried out in a controlled atmosphere.
Claim 20
Dependent Claim
20 words
The method of claim 14 in which the atmosphere comprises gases selected from the group consisting of argon and xenon.
Claim 21
Dependent Claim
15 words
The method of claim 14 in which said process is carried out under vacuum conditions.
Claim 22
Dependent Claim
18 words
The method of claim 14 in which said atmosphere contains less than 10 parts per million of moisture.
Claim 23
Dependent Claim
21 words
The method of claim 1 in which said mold includes an elongate, substantially cylindrical cavity for insertion of said wire ends.
Claim 24
Dependent Claim
21 words
The method of claim 1 in which said mold comprises separate portions to facilitate removal of the resulting solidified superconductive joint.
Claim 25
Dependent Claim
18 words
The method of claim 1 in which said mold comprises material to which said solder does not wet.
Claim 26
Dependent Claim
11 words
The method of claim 1 in which said solder comprises tin.
Claim 27
Dependent Claim
26 words
The method of claim 1 in which said wire ends are removed from said solder bath prior to insertion of said wire ends in said mold.
Claim 28
Dependent Claim
21 words
The method of claim 1 further including the step of inserting said wire ends in said mold in said solder bath.
Claim 29
Dependent Claim
12 words
The superconductive joint produced in accordance with the method of claim 1.
Claim 30
Dependent Claim
19 words
The superconductive loop produced by the formation of a superconductive joint in accordance with the method of claim 1.
Claim 31
Independent Claim
67 words
A method for forming superconductive joints between a plurality of strands of superconductive wire, said method comprising the steps of: disposing the ends of the wires to be joined in a hot liquid metal superconductive solder; removing said wire ends from said hot liquid superconductive solder; inserting said wire ends in a mold with and filling said mold with hot liquid superconductive solder; and solidifying said solder.
Claim 32
Independent Claim
67 words
A method for forming superconductive joints between a plurality of strands of superconductive wire, said method comprising the steps of: disposing the ends of the wires to be joined in a hot liquid metal superconductive solder; removing said wire ends from said hot liquid superconductive solder; inserting said wire ends in a mold with and filling said mold with hot liquid superconductive solder; and solidifying said solder.
Claim 33
Dependent Claim
9 words
The superconductive joint produced in accordance with claim 26.
Claim 34
Dependent Claim
36 words
The method of claim 1 in which said mold includes a portion exhibiting a cross section having a plurality of straight sides, whereby the completed joint includes a portion for facilitating the immobilization of said joint.
Claim 35
Dependent Claim
36 words
The method of claim 26 in which said mold includes a portion exhibiting a cross section having a plurality of straight sides, whereby the completed joint includes a portion for facilitating the immobilization of said joint.
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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) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |