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US3813764A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of producing laminated pancake type superconductive magnets

Assignee: RES INST FOR IRON STEEL AND OTHER METALS JA
•
Filing: 1971-01-18
•
Granted: 1974-06-04
•
Expires: 1991-01-18
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Abstract

Abstract A superconductive magnet comprises superconductive coiled layers; diffusion shielding coiled layers, between which the superconductive coiled layer is put; stabilizing conductor coiled layers, between which the diffusion shielding coiled layer is put; and a normal conductor acting as a superconductive insulation between the superconductive coiled layers. Said superconductive magnet is produced by laminating thin sheets of metal or alloy to constitute the superconductive material in such a ratio that a superconductive alloy or intermetallic compound is formed, superposing thin sheets of metal or alloy shielding diffusion against the former thin sheets and thin sheets of metal or alloy stabilizing the superconductivity on both the surfaces of the laminated sheets respectively, coiling the formed sheets on a core sheath in multilayer, covering the resulting coiled body with an outer sheath, subjecting the assembly to a diameter reducing treatment to adhere the layers and heating the adhered layers until the superconductive alloy or intermetallic compound is formed.

Inventors

  • 👤 T Fukuda
  • 👤 T Yamashita
  • 👤 E Tanaka
  • 👤 Y Onodera
  • 👤 S Kuma

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 03:06
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; H01F41/00; H01F41/02; H01F41/04; H01F41/048; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/24; Y10S174/32; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/93; Y10S505/00; Y10S505/825; Y10S505/879; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/92; Y10S505/921; Y10S505/924; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T29/49789; Y10T29/49798; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12736; Y10T428/12743; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 32 words
covering both sides of said first laminate with thin sheets composed of a diffusion shielding material selected from the group consisting of Nb, Ta, V and Ti to form a second laminate;
Claim 2
Dependent Claim 21 words
The method of claim 1 wherein said tubing is composed of copper and wherein said outer sheathing comprises a copper tube.
Claim 3
Dependent Claim 73 words
The method of claim 2 further comprising, after step (3) and before step (4), covering only one side of said third laminate with a thin insulating layer composed of a member selected from the group consisting of stainless steel, Ni, Zn and Sn; wherein when the resulting laminate is wound around said tubing, said insulating layer is the outermost layer of said resulting laminate as said resulting laminate is wound around said tubing.
Claim 4
Dependent Claim 31 words
covering both sides of said second laminate with thin sheets composed of a conductive stabilizing material selected from the group consisting of Cu, Al and Ag to form a third laminate;
Claim 5
Dependent Claim 11 words
winding said third laminate around a tubing a plurality of times;
Claim 6
Dependent Claim 33 words
The method of claim 2 wherein said heat treatment is conducted at a temperature of from 600* to 1,050* C. for a sufficient period of time to form said superconductive alloy or compound.
Claim 7
Dependent Claim 31 words
The method of claim 2 further comprising covering the product produced in step (5) prior to step (6) with an outer reinforcing case of a material having a high mechanical Strength.
Claim 8
Dependent Claim 9 words
covering the resulting wound material with an outer sheathing;
Claim 9
Dependent Claim 12 words
reducing the diameter of the resulting assembly to form an elongated product;
Claim 10
Dependent Claim 15 words
The method of claim 5 wherein said outer reinforcing case is composed of stainless steel.
Claim 11
Dependent Claim 23 words
The method of claim 2 wherein said superconductive alloy form or compound is selected from the group consisting of Nb3Sn, Nb3Al0.8Ge0.2 or Nb3Al.
Claim 12
Dependent Claim 20 words
subjecting the elongated product to a heat treatment at a temperature sufficient to form said superconductive alloy or compound, and
Claim 13
Dependent Claim 19 words
then cutting the elongated product into a plurality of very short lengths thereby producing said superconductive pancake type magnets.

References Cited (Backward Citations)

US3310862A Cited
US3397084A Cited
US3574573A Cited
US3570118A Cited
US3665595A Cited
US3625662A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-03 1977-12-03 1978-06-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-03 1981-12-03 1982-06-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-03 1985-12-03 1986-06-04 $7700.00 Window Closed / Lapsed

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