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US3869686A Expired / Lapsed US ⏱️ 0.0 years remaining

Super-conductive coils incorporating insulation between adjacent winding layers having a contraction rate matching that of the super-conductive material

Assignee: BBC Brown Boveri AG Switzerland
•
Filing: 1973-10-31
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Granted: 1975-03-04
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Expires: 1993-10-31
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Abstract

Abstract A coil for producing a magnetic field is wound from a conductor made from a super-conductive material and is impregnated with a hardenable synthetic and preferably epoxy resin. Included within the coil structure prior to impregnation is a temporary inlay structure made from a solid material, e.g. Woods-metal which is thereafter removed, by heating, subsequent to hardening of the impregnating means in order to establish cooling ducts through which a coolant is passed while the coil is in operation in order to maintain the coil in its superconductive state. The coil structure also includes structural reinforcing elements in the form of fiber glass fabrics or netting having a thermally conductive metallic surface coating, and also metallic inserts in fabric or mesh form made from insulated copper or aluminum wire to assist in the removal of heat from the coil.

Inventors

  • 👤 Hans Benz

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 17:23
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F6/00; H01F6/06; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/88; Y10S505/884; Y10S505/887

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 84 words
A MAGNECTIC FIELD-PRODUCING COIL COMPRISING A PLURALITY OF LAYERS WOUND FROM A CONDUCTOR MADE OF SUPER-CONDUCTIVE MATERIAL, SAID COIL BEING IMPREGNATED WITH A HARDENED SYNTHETIC AND PREFERABLY EPOXY RESIN, AND CONTAINING A SYSTEM OF COOLING DUCTS, THERE BEING DISPOSED BETWEEN ADJACENT WINDING LAYERS A REINFORCING FIBER LAYER SUCH AS WILL FORM IN CONJUNCTION WITH THE IMPREGNATING RESIN A SYSTEM FREE FROM EDDY CURRENTS AND HAVING A HIGH DEGREE OF MECHANICAL STABILITY AND WHICH HAS A CONTRACTION RATE AT THE OPERATING TEMPERATURE OF THE COIL
Claim 2
Dependent Claim 84 words
A MAGNECTIC FIELD-PRODUCING COIL COMPRISING A PLURALITY OF LAYERS WOUND FROM A CONDUCTOR MADE OF SUPER-CONDUCTIVE MATERIAL, SAID COIL BEING IMPREGNATED WITH A HARDENED SYNTHETIC AND PREFERABLY EPOXY RESIN, AND CONTAINING A SYSTEM OF COOLING DUCTS, THERE BEING DISPOSED BETWEEN ADJACENT WINDING LAYERS A REINFORCING FIBER LAYER SUCH AS WILL FORM IN CONJUNCTION WITH THE IMPREGNATING RESIN A SYSTEM FREE FROM EDDY CURRENTS AND HAVING A HIGH DEGREE OF MECHANICAL STABILITY AND WHICH HAS A CONTRACTION RATE AT THE OPERATING TEMPERATURE OF THE COIL
Claim 3
Dependent Claim 23 words
A magnetic field-producing coil as defined in claim 1 wherein said reinforcing fiber layer is comprised of a fabric made from glass fibers.
Claim 4
Dependent Claim 23 words
A magnetic field-producing coil as defined in claim 1 wherein said reinforcing fiber layer is comprised of a netting made from glass fibers.
Claim 5
Dependent Claim 26 words
A magnetic field-producing coil as defined in claim 1 wherein said reinforcing fiber layer has applied thereto a metallic coating having a good thermal conductivity characteristic.
Claim 6
Dependent Claim 31 words
A magnetic field-producing coil as defined in claim 4 wherein the metallic coating applied to said reinforcing fiber layer is chosen from the group consisting of copper, aluminum and graphite powder.
Claim 7
Dependent Claim 39 words
A magnetic field-producing coil as defined in claim 4 wherein said metallic coating applied to said reinforcing fiber layer has a relatively high electrical resistance thereby to avoid eddy current losses in the case where the magnetic field pulsates.
Claim 8
Dependent Claim 42 words
A magnetic field-producing coil as defined in claim 6 wherein the relatively high electrical resistance characteristic of said reinforcing fiber layer is attained by application of the metallic coating in the form of narrow, parallel and closely laid strips of the metal.

References Cited (Backward Citations)

US3363207A Cited
US3550050A Cited
US3559126A Cited
US3748615A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-03-03 1978-09-02 1979-03-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-03-03 1982-09-02 1983-03-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-03-03 1986-09-02 1987-03-04 $7700.00 Window Closed / Lapsed

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