WO1980002084A1 - Superconducting junction - Google Patents
Superconducting junction Download PDFInfo
- Publication number
- WO1980002084A1 WO1980002084A1 PCT/US1980/000232 US8000232W WO8002084A1 WO 1980002084 A1 WO1980002084 A1 WO 1980002084A1 US 8000232 W US8000232 W US 8000232W WO 8002084 A1 WO8002084 A1 WO 8002084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filaments
- alloy
- superconductive
- superconducting
- sleeve
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
Definitions
- the principal object of the present invention is the provision of a method for reliably splicing multifilament high field alloy superconducting wire and forming super ⁇ conducting splices. Production of reliable splices will, for example, reduce the manufacturing costs for super ⁇ conducting magnets.
- the non- superconducting material surrounding the area of the multifilament superconductors to be spliced is removed by dissolving it in acid .prior to insertion of the exposed filaments into a superconducting alloy sleeve.
- the exposed area of the multifilament wire is inserted in a sleeve comprised of the same superconductive alloy as the multifilament wire and the assembly is cold compressed at room temperature.
- FIG. la and lb are perspective views of a high field superconducting splice prior to compression incorporating features of the present invention.
- FIGS. 2a and 2b show cross sectional views of two embodiments of the superconducting wires to be spliced.
- FIGS. 3a and 3b show perspective views of two embodi- ments of the superconducting wires to be spliced, after removal of the non-superconducting material by acid etching and agitation.
- FIG. 4a and 4b show enlarged sectional view of the splice 1, FIGS, la anc ⁇ lb taken along line 4-4 in the direction of the arrows.
- FIGS. 5 is cross sectional views of two embodiments of FIG. 6 delineated by line 4-4.
- FIG. 6a and 6b are perspective views of a compressed superconducting splice incorporating features of the present invention.
- FIGS, la and lb there is shown two embodiments of the invention employing a high field • superconducting sleeve 2 for splicing together two superconductor cables 3 containing a plurality of filaments of alloy superconductor material.
- the splice 1 to be produced is made from a cylinder-like sleeve body structure 2 of superconducting alloy having a hardness and compressibility similar to that of the alloy super- conducting portions 5 of cables 3.
- body 2 is fused together the high field alloy superconductive wire por ⁇ tions 5 of cables 3 become embedded in cylinder body 2.
- body 2 and alloy superconductive wire portions 5 of cables 3 form a high field conductive bridge between cables 3 which when compressed form the high field super ⁇ conducting splice 1 illustrated in FIG. 6a.
- both cables 3 are inserted into sleeve 2 from the same side while in FIG. lb the cables 3 are inserted into the sleeve from the opposite side.
- high field means a super- conductive material having its critical magnetic field intensity greater than 20 kilogauss at 4.2 degrees K and "alloy superconductors” means a superconductor material made by adding other materials to a basic metal as opposed to a superconducting material in which the elements form chemical bonds and where the elements combine in definite proportions by weight.
- alloy superconductors are Nb-Ti, Nb-Zr, Nb-Hf, and Mo-Re, all of which are malleable type 2 superconductors.
- Type II superconductor materials differ from Type I superconductors in that a Type I material oriented parallel to a magnetic field will exhibit superconducting properties only in a surface sheath several hundred angstroms deep. Further,' Type I material superconductivity is limited to a critical field of a few hundred oersteds. Type II superconductors, above a certain field, microscopically divide into alterna tive regions of normai and superconducting material and in some materials the superconducting region can persist throughout the rod to very high critical fields. Compound type superconductors such as Nb3Sn, V3Ga and V3Si have been commonly used in the prior art in superconducting magnets.
- the two superconducting cables 3 to be spliced are multi ⁇ filament in character as contrasted with monofilament wire members, and may take any one of a number of different forms and geometries.
- FIGS. 2a and 2b With reference to FIGS. 2a and 2b,
- OM members 3, for example, may comprise two cables having ultifilaments of circular cross-section 5, or may comprise cables having multifilaments of oval or circular superconductive members 5 1 .
- the circular cross-sectional superconductor comprises a plurality of superconductive members 5, as of a niobium-titanium alloy material.
- This niobium-titanium alloy is commercially available in weight percents of titanium from 20-60%, the alloy consisting of niobium, titanium and traces of other inorganics commonly present as a by-product of the alloy manufacture.
- a superconducting cable 3 containing 54 filaments of 44% by weight titanium where the balance is niobium and trace impurities. Each filament is approximately 0.04 millimeter diameter.
- the conductive jacket 6 preferrably has excellent thermal and electrical conductivities and can be present in varying amounts.
- the non- superconductive material 6 around and between the super ⁇ conductive multifilament members 5 is removed from the ends of cable 3, which ends are to be spliced together.
- This agitation can advantageously be supplied for example, by an ultrasonic agitation device and has been found to be particularly effective in removing traces of the conduc ⁇ tive layer 6 which remain bonded to or in contact with the multifilament members 5 at the ends of cables 3.
- the acid and agitation steps are continued until there are no traces of conductive layer 6 visible to the eye.
- this ultrasonic cleaning was completed in approximately ten minutes, but can be up to one hour depending on the material to be removed and the acids employed. Visual observation of removal of the non-superconductive material has proven adequate.
- the exposed superconducting multifilament members 5 are inserted into sleeve 2 which is made from a superconducting alloy of similar hardness and compressibility as comprises multifilament members 5.
- this sleeve 2 preferrably has an internal diameter of 0.61 millimeters and an external diameter of 3.2 millimeters for encasing cables of 0.5
- OMP .. IP millimeters diameter and is preferably made from the same superconductive alloy material as the filaments.
- the sleeve 2 must be a superconducting alloy it need not necessarily be made of the same superconducting alloy or the same ratio of superconducting elements as is the filaments so long as the hardness of the sleeve member 2 and filaments 5 is greater than the hardness of the non-superconductive material.
- the sleeve 2 need not completely encircle the cleaned multifilaments 5 but may be slotted in order to facilitate introduction of the filaments.
- This assembly is then com ⁇ pressed between two lubricated dies whose axis is at right angles to the sleeve 2 and to the inserted superconducting multifilament members 5.
- Lubricated dies are used to pre- vent welding of the superconducting alloy sleeve to the dies.
- the force used to compress the sleeve assembly is that needed to reduce the sleeve/multifilament cable assembly to a thickness of approximately 0.5 millimeters.
- the compressed assembly is illustrated in FIGS. 6a and 6b.
- FIGS. 6a and 6b correspond to FIGS, la and lb respectively.
- a loop wound with the aforementioned superconducting multifilament wire having its ends spliced together by means of the inventive method has been tested and it has been found to have a resistance of less than 2.5 x 10 ⁇ 14 ohms.
- the multifilament superconductive splicing method as described above, may be employed similarly for splic ⁇ ing other malleable type 2 multifilament superconductor cables containing superconductive alloys such as Nb-Zr, Nb-HF, and Mo-Re.
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
The method for splicing high field superconductor cables (3 or 3') in which the ends of the cables are acid etched and agitated to remove non-superconductive material, the exposed superconducting filaments (5 or 5') are inserted into a sleeve of superconducting alloy (2), and the assembly cold pressed into a compacted splice (2') at room temperature.
Description
Description
Superconducting Junction
PRIOR ART
Heretofore, high field superconducting wire splices have been attempted using compound superconducting wires and particulate material of the same constituent elements as the compound superconducting wires. These superconducting wire/particulate material sandwich assemblies were then compressed to enable intimate contact of the members and finally heated to form the splice. Such methods for forming superconducting splices have been disclosed and claimed in U.S. patent numbers 3,523,361 and 3,848,075 issued August 11, 1970 and November 12, 1974 respectively, and assigned to the same assignee as the present invention.
MIT National Magnet Laboratory Annual Report, July 1975, pg. 137 discloses splices made in superconducting wires with a copper sheath which is cold pressed. This technique is unreliable.
The prior art techniques were unreliable and did not always produce a good splice that would exhibit the same superconducting properties as the stock material.
_ OMPI
Although not entirely understood, it is believed that one of the problems encountered with splicing multifila- ment superconducting wire using the prior art techniques was the inability to make superconducting contact between all of the filaments in the two wires.
SUMMARY OF THE PRESENT INVENTION The principal object of the present invention is the provision of a method for reliably splicing multifilament high field alloy superconducting wire and forming super¬ conducting splices. Production of reliable splices will, for example, reduce the manufacturing costs for super¬ conducting magnets.
In one feature of the present invention, the non- superconducting material surrounding the area of the multifilament superconductors to be spliced is removed by dissolving it in acid .prior to insertion of the exposed filaments into a superconducting alloy sleeve.
In another feature of the present invention, prior to insertion into the superconducting alloy sleeve, normal material surrounding the splice area of the multifilament wires is removed by ultrasonic agitation in an acid.
In another feature of the present invention, the exposed area of the multifilament wire is inserted in a sleeve comprised of the same superconductive alloy as the multifilament wire and the assembly is cold compressed at room temperature.
BRIEF DESCRIPTIONS OF THE DRAWINGS FIG. la and lb are perspective views of a high field superconducting splice prior to compression incorporating features of the present invention.
FIGS. 2a and 2b show cross sectional views of two embodiments of the superconducting wires to be spliced.
FIGS. 3a and 3b show perspective views of two embodi- ments of the superconducting wires to be spliced, after removal of the non-superconducting material by acid etching and agitation.
FIG. 4a and 4b show enlarged sectional view of the splice 1, FIGS, la ancϊ lb taken along line 4-4 in the direction of the arrows.
FIGS. 5 is cross sectional views of two embodiments of FIG. 6 delineated by line 4-4.
FIG. 6a and 6b are perspective views of a compressed superconducting splice incorporating features of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS, la and lb, there is shown two embodiments of the invention employing a high field • superconducting sleeve 2 for splicing together two superconductor cables 3 containing a plurality of filaments of alloy superconductor material. The splice 1 to be produced is made from a cylinder-like sleeve body structure 2 of superconducting alloy having a hardness and compressibility similar to that of the alloy super- conducting portions 5 of cables 3. When body 2 is fused together the high field alloy superconductive wire por¬ tions 5 of cables 3 become embedded in cylinder body 2. Thus, body 2 and alloy superconductive wire portions 5 of cables 3 form a high field conductive bridge between cables 3 which when compressed form the high field super¬ conducting splice 1 illustrated in FIG. 6a. In FIG. la both cables 3 are inserted into sleeve 2 from the same
side while in FIG. lb the cables 3 are inserted into the sleeve from the opposite side.
As used herein, the term "high field" means a super- conductive material having its critical magnetic field intensity greater than 20 kilogauss at 4.2 degrees K and "alloy superconductors" means a superconductor material made by adding other materials to a basic metal as opposed to a superconducting material in which the elements form chemical bonds and where the elements combine in definite proportions by weight. Examples of alloy superconductors are Nb-Ti, Nb-Zr, Nb-Hf, and Mo-Re, all of which are malleable type 2 superconductors. Type II superconductor materials differ from Type I superconductors in that a Type I material oriented parallel to a magnetic field will exhibit superconducting properties only in a surface sheath several hundred angstroms deep. Further,' Type I material superconductivity is limited to a critical field of a few hundred oersteds. Type II superconductors, above a certain field, microscopically divide into alterna tive regions of normai and superconducting material and in some materials the superconducting region can persist throughout the rod to very high critical fields. Compound type superconductors such as Nb3Sn, V3Ga and V3Si have been commonly used in the prior art in superconducting magnets.
With reference to FIGS. 2 through 6, the supercon¬ ductive splice of the present invention will be described in greater detail as well as a method for making the same. The two superconducting cables 3 to be spliced are multi¬ filament in character as contrasted with monofilament wire members, and may take any one of a number of different forms and geometries. With reference to FIGS. 2a and 2b,
OM
members 3, for example, may comprise two cables having ultifilaments of circular cross-section 5, or may comprise cables having multifilaments of oval or circular superconductive members 51. For the particular case illustrated in FIG. 2a, the circular cross-sectional superconductor comprises a plurality of superconductive members 5, as of a niobium-titanium alloy material. This niobium-titanium alloy is commercially available in weight percents of titanium from 20-60%, the alloy consisting of niobium, titanium and traces of other inorganics commonly present as a by-product of the alloy manufacture. One such example is a superconducting cable 3 containing 54 filaments of 44% by weight titanium where the balance is niobium and trace impurities. Each filament is approximately 0.04 millimeter diameter.
A coating 6, of non-superconductive material, such as copper, silver or aluminum, forms a conductive jacket around and between the multifilament alloy superconductive members 5 or 5'. The conductive jacket 6 preferrably has excellent thermal and electrical conductivities and can be present in varying amounts. One example used copper as the coating 6, present around the filaments 5 in the weight ratio of copper to superconductor of 2:1. In the region to be bridged by sleeve 2, the non- superconductive material 6 around and between the super¬ conductive multifilament members 5 is removed from the ends of cable 3, which ends are to be spliced together. This removal exposes the superconducting multifilaments 5 and 5' such that, in the region- of the splice an intimate contact may be made between the alloy super¬ conductive multifilaments 5. By way of example, it has been found satisfactory, in stripping the conductive layer
6 away from the multifilament members 5, to dip approxi¬ mately one inch of- each superconductive cable 3 into a solution of concentrated acid, such as nitric or sulfuric acid, for a period from 5 minutes to 1 hour depending on the amount of conductive layer 6 present. The acid is permitted to act for a time sufficient to dissolve away all visible traces of the conductive material 6 from the vicinity of the superconducting multifilaments 5 at the ends of cables 3.
It has been found to be particularly effective to agitate the acid during dissolution to expose each super¬ conducting multifilament member 5 more quickly. This agitation can advantageously be supplied for example, by an ultrasonic agitation device and has been found to be particularly effective in removing traces of the conduc¬ tive layer 6 which remain bonded to or in contact with the multifilament members 5 at the ends of cables 3. The acid and agitation steps are continued until there are no traces of conductive layer 6 visible to the eye. For the 54 filament 0.04 mm diameter cable, this ultrasonic cleaning was completed in approximately ten minutes, but can be up to one hour depending on the material to be removed and the acids employed. Visual observation of removal of the non-superconductive material has proven adequate.
In making the splice 1, the exposed superconducting multifilament members 5 are inserted into sleeve 2 which is made from a superconducting alloy of similar hardness and compressibility as comprises multifilament members 5. By way of example, this sleeve 2 preferrably has an internal diameter of 0.61 millimeters and an external diameter of 3.2 millimeters for encasing cables of 0.5
OMP .. IP
millimeters diameter and is preferably made from the same superconductive alloy material as the filaments. Although the sleeve 2 must be a superconducting alloy it need not necessarily be made of the same superconducting alloy or the same ratio of superconducting elements as is the filaments so long as the hardness of the sleeve member 2 and filaments 5 is greater than the hardness of the non-superconductive material. After insertion of the chemically etched supercon¬ ducting multifilament members 5 into the superconducting alloy sleeve 2, this assembly has the configuration sche¬ matically depicted in greater detail in FIGS. 4a and 4b. The sleeve 2 need not completely encircle the cleaned multifilaments 5 but may be slotted in order to facilitate introduction of the filaments. This assembly is then com¬ pressed between two lubricated dies whose axis is at right angles to the sleeve 2 and to the inserted superconducting multifilament members 5. Lubricated dies are used to pre- vent welding of the superconducting alloy sleeve to the dies. The force used to compress the sleeve assembly is that needed to reduce the sleeve/multifilament cable assembly to a thickness of approximately 0.5 millimeters. The compressed assembly is illustrated in FIGS. 6a and 6b. FIGS. 6a and 6b correspond to FIGS, la and lb respectively. A loop wound with the aforementioned superconducting multifilament wire having its ends spliced together by means of the inventive method has been tested and it has been found to have a resistance of less than 2.5 x 10~14 ohms. The multifilament superconductive splicing method, as described above, may be employed similarly for splic¬ ing other malleable type 2 multifilament superconductor cables containing superconductive alloys such as Nb-Zr, Nb-HF, and Mo-Re.
- _ Ωct
OMPI /b WIPO
Claims
1. A method for forming a superconductive splice in a plurality of cables containing filaments of a high field alloy superconductive material comprising the steps of: exposing a portion of the said filaments of said high field alloy near the ends of said plurality of cables; and cold compressing a superconductive alloy member around said exposed portion of said filaments for obtaining intimate contact with the plurality of exposed filaments to be spliced to form a high field alloy superconductive splice, said superconducting alloy members containing constituent elements of similar hardness and compressibility as the constituent elements of said high field alloy superconductive filaments to be spliced together.
2. The method of claim 1 wherein said supercon- ducting alloy member is a sleeve which contains the same constituent elements as the constituent elements of the high field alloy superconductive filaments.
3. The method of claim 1 wherein the high field superconducting alloy filaments to be spliced and the superconductive alloy member are both malleable type 2 superconductors.
4. The method of claim 2 wherein the high field superconductive filaments and said superconducting alloy sleeve which is compressed around the superconductive filaments are both made from niobium-titanium alloy.
OMPI WIPO
5. The method of claim 1 wherein said step of expos¬ ing said portion of high field filaments near the ends of said cables comprises dissolving in acid the non-super- conductive material between and around said filaments.
6. The method of claim 5 wherein the said acid is selected from the group consisting of nitric acid and sulfuric acid.
7. The method of claim 6 wherein the acid is caused to retain contact with the multifilament superconductive alloy near the ends to be exposed for a time sufficient to substantially remove all non-superconductive material near the splice site which is visible without magnefica- tion.
8. The method of claim 5 wherein said dissolving step is accompanied by agitation.
9. The method of claim 8 wherein the agitation is supplied by ultrasonic energy.
10. The method of claim 2 wherein the step of com- pressing a superconductive alloy member around said exposed portion of said filaments includes overlaying said exposed portions of said cables within said sleeve.
11. The method of claim 1 wherein the step of com¬ pressing a- superconductive alloy member around said exposed superconducting filaments includes butting the ends of said filaments of said cables.
12. The method of claim 2 wherein the said exposed superconducting filaments of said cables are inserted into said sleeve from opposite ends of said sleeve.
13. The method of claim 2 wherein the said exposed superconducting filaments are inserted into said sleeve from the same end of said sleeve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2399479A | 1979-03-27 | 1979-03-27 | |
| US23994 | 1979-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1980002084A1 true WO1980002084A1 (en) | 1980-10-02 |
Family
ID=21818292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1980/000232 WO1980002084A1 (en) | 1979-03-27 | 1980-03-07 | Superconducting junction |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE882457A (en) |
| WO (1) | WO1980002084A1 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0077539A2 (en) * | 1981-10-21 | 1983-04-27 | Asea Brown Boveri Aktiengesellschaft | Method of fabricating a superconducting joint |
| EP0130923A1 (en) * | 1983-07-05 | 1985-01-09 | Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) | Method of making a connection between superconducting wires |
| EP0137170A2 (en) * | 1983-09-12 | 1985-04-17 | General Electric Company | Method for forming a superconductive joint between multifilament superconductors |
| EP0148479A2 (en) * | 1983-12-30 | 1985-07-17 | General Electric Company | Methods of forming Superconducting joints for superconducting wires and coils |
| US4794688A (en) * | 1986-04-04 | 1989-01-03 | Hitachi, Ltd. | Method of connecting superconducting wires |
| US4797510A (en) * | 1987-10-13 | 1989-01-10 | Amax, Inc. | Device for joining superconducting wire |
| US4901429A (en) * | 1988-02-17 | 1990-02-20 | General Electric Company | Method and apparatus for making a superconducting joint |
| US5082164A (en) * | 1990-08-01 | 1992-01-21 | General Electric Company | Method of forming superconducting joint between superconducting tapes |
| US5111574A (en) * | 1988-12-05 | 1992-05-12 | Teledyne Industries, Inc. | Method and apparatus for producing superconducting joints |
| US5134040A (en) * | 1990-08-01 | 1992-07-28 | General Electric Company | Melt formed superconducting joint between superconducting tapes |
| US5253413A (en) * | 1993-01-04 | 1993-10-19 | General Electric Company | Method for making a superconducting joint for a superconducting magnet which images human limbs |
| US5290638A (en) * | 1992-07-24 | 1994-03-01 | Massachusetts Institute Of Technology | Superconducting joint with niobium-tin |
| US5949131A (en) * | 1991-02-25 | 1999-09-07 | Sumitomo Electric Industries, Ltd. | Junction between wires employing oxide superconductors and joining method therefor |
| EP1434280A1 (en) * | 2002-12-24 | 2004-06-30 | Shahin Pourrahimi | superconducting joint between multifilamentary superconducting wires |
| EP1489691A1 (en) * | 2003-06-19 | 2004-12-22 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| US7071148B1 (en) * | 2005-04-08 | 2006-07-04 | Superpower, Inc. | Joined superconductive articles |
| US8716188B2 (en) | 2010-09-15 | 2014-05-06 | Superpower, Inc. | Structure to reduce electroplated stabilizer content |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2251709A (en) * | 1940-01-04 | 1941-08-05 | Nat Telephone Supply Co | Method of connecting wires to sleeves |
| US2803695A (en) * | 1951-05-03 | 1957-08-20 | Amp Inc | Closed end connector |
| US2882333A (en) * | 1954-04-08 | 1959-04-14 | Forges Ateliers Const Electr | Electric cable joints |
| US3066084A (en) * | 1959-08-10 | 1962-11-27 | Jones & Laughlin Steel Corp | Ultrasonic pickling |
| US3231964A (en) * | 1961-06-19 | 1966-02-01 | Gen Electric | Method of making an electrical connection |
| US3277564A (en) * | 1965-06-14 | 1966-10-11 | Roehr Prod Co Inc | Method of simultaneously forming a plurality of filaments |
| US3320659A (en) * | 1964-07-02 | 1967-05-23 | Jerome Jack | Method of connecting cable ends |
| US3422529A (en) * | 1963-12-09 | 1969-01-21 | North American Rockwell | Method of making a superconductive joint |
| US3523261A (en) * | 1967-01-30 | 1970-08-04 | Federal Pacific Electric Co | Current limiting circuit breakers |
| US3527876A (en) * | 1967-10-13 | 1970-09-08 | Bbc Brown Boveri & Cie | Electrical connection between superconductors |
| US3618205A (en) * | 1967-04-27 | 1971-11-09 | Imp Metal Ind Kynoch Ltd | Method of fabricating a composite superconducting wire |
| GB1298068A (en) * | 1969-03-06 | 1972-11-29 | British Oxygen Co Ltd | Joining superconductors |
| US3848075A (en) * | 1971-12-27 | 1974-11-12 | Varian Associates | Method for splicing compound superconductors |
| US4148129A (en) * | 1976-11-01 | 1979-04-10 | Airco, Inc. | Aluminum-stabilized multifilamentary superconductor and method of its manufacture |
-
1980
- 1980-03-07 WO PCT/US1980/000232 patent/WO1980002084A1/en not_active Application Discontinuation
- 1980-03-26 BE BE0/199970A patent/BE882457A/en unknown
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2251709A (en) * | 1940-01-04 | 1941-08-05 | Nat Telephone Supply Co | Method of connecting wires to sleeves |
| US2803695A (en) * | 1951-05-03 | 1957-08-20 | Amp Inc | Closed end connector |
| US2882333A (en) * | 1954-04-08 | 1959-04-14 | Forges Ateliers Const Electr | Electric cable joints |
| US3066084A (en) * | 1959-08-10 | 1962-11-27 | Jones & Laughlin Steel Corp | Ultrasonic pickling |
| US3231964A (en) * | 1961-06-19 | 1966-02-01 | Gen Electric | Method of making an electrical connection |
| US3422529A (en) * | 1963-12-09 | 1969-01-21 | North American Rockwell | Method of making a superconductive joint |
| US3320659A (en) * | 1964-07-02 | 1967-05-23 | Jerome Jack | Method of connecting cable ends |
| US3277564A (en) * | 1965-06-14 | 1966-10-11 | Roehr Prod Co Inc | Method of simultaneously forming a plurality of filaments |
| US3523261A (en) * | 1967-01-30 | 1970-08-04 | Federal Pacific Electric Co | Current limiting circuit breakers |
| US3618205A (en) * | 1967-04-27 | 1971-11-09 | Imp Metal Ind Kynoch Ltd | Method of fabricating a composite superconducting wire |
| US3527876A (en) * | 1967-10-13 | 1970-09-08 | Bbc Brown Boveri & Cie | Electrical connection between superconductors |
| GB1298068A (en) * | 1969-03-06 | 1972-11-29 | British Oxygen Co Ltd | Joining superconductors |
| US3848075A (en) * | 1971-12-27 | 1974-11-12 | Varian Associates | Method for splicing compound superconductors |
| US4148129A (en) * | 1976-11-01 | 1979-04-10 | Airco, Inc. | Aluminum-stabilized multifilamentary superconductor and method of its manufacture |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0077539A3 (en) * | 1981-10-21 | 1985-12-04 | Brown, Boveri & Cie Aktiengesellschaft | Superconducting joint |
| EP0077539A2 (en) * | 1981-10-21 | 1983-04-27 | Asea Brown Boveri Aktiengesellschaft | Method of fabricating a superconducting joint |
| EP0130923A1 (en) * | 1983-07-05 | 1985-01-09 | Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) | Method of making a connection between superconducting wires |
| FR2548838A1 (en) * | 1983-07-05 | 1985-01-11 | Centre Nat Rech Scient | METHOD FOR MAKING CONNECTION BETWEEN SUPERCONDUCTING WIRES AND CONNECTION OBTAINED THEREBY |
| US4558512A (en) * | 1983-07-05 | 1985-12-17 | Centre National De La Recherche Scientifique | Process for making a connection between superconductive wires and to a connection obtained by this process |
| EP0137170A3 (en) * | 1983-09-12 | 1985-12-11 | General Electric Company | Method for forming a superconductive joint between multifilament superconductors |
| US4631808A (en) * | 1983-09-12 | 1986-12-30 | General Electric Company | Method of forming a superconductive joint between multifilament superconductors |
| EP0137170A2 (en) * | 1983-09-12 | 1985-04-17 | General Electric Company | Method for forming a superconductive joint between multifilament superconductors |
| EP0148479A2 (en) * | 1983-12-30 | 1985-07-17 | General Electric Company | Methods of forming Superconducting joints for superconducting wires and coils |
| EP0148479A3 (en) * | 1983-12-30 | 1985-12-18 | General Electric Company | Superconducting joint for superconducting wires and coils and method of forming |
| US4907338A (en) * | 1983-12-30 | 1990-03-13 | General Electric Company | Superconducting joint for superconducting wires and coils and method of forming |
| US4794688A (en) * | 1986-04-04 | 1989-01-03 | Hitachi, Ltd. | Method of connecting superconducting wires |
| US4797510A (en) * | 1987-10-13 | 1989-01-10 | Amax, Inc. | Device for joining superconducting wire |
| US4901429A (en) * | 1988-02-17 | 1990-02-20 | General Electric Company | Method and apparatus for making a superconducting joint |
| US5111574A (en) * | 1988-12-05 | 1992-05-12 | Teledyne Industries, Inc. | Method and apparatus for producing superconducting joints |
| US5082164A (en) * | 1990-08-01 | 1992-01-21 | General Electric Company | Method of forming superconducting joint between superconducting tapes |
| US5134040A (en) * | 1990-08-01 | 1992-07-28 | General Electric Company | Melt formed superconducting joint between superconducting tapes |
| US5949131A (en) * | 1991-02-25 | 1999-09-07 | Sumitomo Electric Industries, Ltd. | Junction between wires employing oxide superconductors and joining method therefor |
| US5290638A (en) * | 1992-07-24 | 1994-03-01 | Massachusetts Institute Of Technology | Superconducting joint with niobium-tin |
| US5398398A (en) * | 1992-07-24 | 1995-03-21 | Massachusetts Institute Of Technology | Method of producing a superconducting joint with niobium-tin |
| US5253413A (en) * | 1993-01-04 | 1993-10-19 | General Electric Company | Method for making a superconducting joint for a superconducting magnet which images human limbs |
| EP1434280A1 (en) * | 2002-12-24 | 2004-06-30 | Shahin Pourrahimi | superconducting joint between multifilamentary superconducting wires |
| EP1489691A1 (en) * | 2003-06-19 | 2004-12-22 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| EP1560293A2 (en) * | 2003-06-19 | 2005-08-03 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| EP1560293A3 (en) * | 2003-06-19 | 2005-08-10 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| US7094973B2 (en) | 2003-06-19 | 2006-08-22 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| US7279639B2 (en) | 2003-06-19 | 2007-10-09 | Sumitomo Electric Industries, Ltd. | Superconducting cable joint structure |
| US7071148B1 (en) * | 2005-04-08 | 2006-07-04 | Superpower, Inc. | Joined superconductive articles |
| WO2006110637A3 (en) * | 2005-04-08 | 2007-03-15 | Superpower Inc | Joined superconductive articles |
| US8716188B2 (en) | 2010-09-15 | 2014-05-06 | Superpower, Inc. | Structure to reduce electroplated stabilizer content |
Also Published As
| Publication number | Publication date |
|---|---|
| BE882457A (en) | 1980-07-16 |
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