US4682134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conical, unimpregnated winding for MR magnets
Assignee: General Electric Co
•
Filing: 1985-06-03
•
Granted: 1987-07-21
•
Expires: 2005-06-03
Abstract
Abstract An unimpregnated winding for use in a cryostat of a superconducting magnet is provided comprising a form including a shell having the shape of two truncated cones attached to one another at their respective bases. Superconducting wire is wrapped around the form under tension so that during superconducting magnet operation, the form remains under compression.
Inventors
- 👤 Evangelos T. Laskaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:22
CPC Classifications
H; H01; H01F; H01F6/00; G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; H01F6/06; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/879
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
A winding for use in a cryostat of a superconductor magnet comprising: a form comprising a shell having the shape of two truncated cones joined at their respective bases; and superconducting wire wound circumferentially around said form under sufficient tension so that during superconducting magnet operation said form remains under compression.
Claim 2
Dependent Claim
51 words
A winding for use in a cryostat of a superconductor magnet comprising: a form comprising a shell having the shape of two truncated cones joined at their respective bases; and superconducting wire wound circumferentially around said form under sufficient tension so that during superconducting magnet operation said form remains under compression.
Claim 3
Dependent Claim
50 words
The winding of claim 1 wherein said form further comprises radially protruding shoulders extending circumferentially around said form and axially spaced apart from one another, a portion of said winding having a plurality of turns with axial turn-to-turn compression between adjacent turns being wound between predetermined pairs of adjacent shoulders.
Claim 4
Dependent Claim
25 words
The winding of claim 2 wherein said shoulders define axially extending slots therethrough to avoid distortion of said form when said form is under compression.
Claim 5
Dependent Claim
18 words
The winding of claim 1 wherein said superconductor or winding further comprises a film insulator surrounding said winding.
Claim 6
Dependent Claim
53 words
The winding of claim 1 further comprising an array of equally spaced axially extending insulating tapes providing insulation from the radially inward and radially outward surface adjacent to each layer of superconductor winding so as to provide gaps between axially extending tapes to permit the flow of gas cryogen to the superconducting winding.
Claim 7
Dependent Claim
53 words
The winding of claim 4 further comprising an array of equally spaced axially extending insulating tapes providing insulation from the radially inward and radially outward surface adjacent to each layer of superconductor winding so as to provide gaps between axially extending tapes to permit the flow of gas cryogen to the superconducting winding.
Claim 8
Dependent Claim
68 words
The winding of claim 4 further comprising wire overwrapped around said superconductor winding under tension so that internal winding hoop stresses of said superconductor wire are reduced, said superconductor winding and overwrap winding tension selected so that the form remains under compression during superconductor magnet operation whereby the superconductor winding will not become detached from the form and frictional heating as a result of motion will be minimal.
Claim 9
Dependent Claim
28 words
The winding of claim 4 wherein said superconductor wire is wrapped with a metal tape of high thermal conductivity and further wrapped with a tape providing electrical insulation.
Claim 10
Dependent Claim
16 words
The winding of claim 1 wherein said superconductor wire achieves axial turn-to-turn compression between adjacent turns.
References Cited (Backward Citations)
DE1160949B
Cited
US3158794A
Cited
US3439305A
Cited
US3393386A
Cited
US3559126A
Cited
DE2040298A1
Cited
US3713058A
Cited
US3715452A
Cited
JPH109205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |