Patent USH693H successfully refreshed from Google Patents.
USH693H
Expired / Lapsed
US
⏱️ 0.0 years remaining
PYX twister with superconducting confinement
Assignee: United States Department of the Army
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Filing: 1989-02-24
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Granted: 1989-10-03
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Expires: 2009-02-24
Abstract
Abstract Permanent magnet structures are fabricated from a plurality of hollow cylrical flux sources, the sources displaced radially from each other progressively along the structures' elongate axes so as to produce a heliform magnetic field extending centrally in a passage through the structures. Superconducting plates are interspersed between adjacent flux sources and also cover the end faces of the array.
Inventors
- 👤 Herbert A. Leupold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:05
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A magnetic structure comprising a plurality of hollow substantially cylindrical flux sources, each having a generally centrally disposed hole therethrough, arranged concentrically on an elongate axis with said holes in substantial registration along said axis to define an elongate axial passage extending through said structure; each respective hollow substantially cylindrical flux source displaced radially on said elongate axis from its respective adjacent source so as to produce a helically oriented magnetic field; and superconducting sheets interspersed between adjacent flux sources and also covering the end faces of the array.
Claim 2
Dependent Claim
89 words
A magnetic structure comprising a plurality of hollow substantially cylindrical flux sources, each having a generally centrally disposed hole therethrough, arranged concentrically on an elongate axis with said holes in substantial registration along said axis to define an elongate axial passage extending through said structure; each respective hollow substantially cylindrical flux source displaced radially on said elongate axis from its respective adjacent source so as to produce a helically oriented magnetic field; and superconducting sheets interspersed between adjacent flux sources and also covering the end faces of the array.
Claim 3
Dependent Claim
28 words
A magnetic structure as defined in claim 1 wherein each superconducting sheet has an axial disposed hole to permit passage of an electron beam through the entire structure.
Claim 4
Dependent Claim
20 words
A magnetic structure defined in claim 2 wherein the superconducting sheets are at least peripherally coextensive with the flux sources.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |