US3223897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for adjusting the configuration of a magnetic field
Assignee: Varian Medical Systems Inc
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Filing: 1963-09-23
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Granted: 1965-12-14
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Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph T Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:22
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN ADJUSTABLE MAGNET COMPRISING: A PAIR OF MAGNETIC POLE MEMBERS SPACED IN OPPOSITION AND DEFINING A NONMAGNETIC GAP, EACH MEMBER COMPRISING A MAGNETIC POLE PIECE AND A MAGNETIC POLE CAP JOINED TO SAID POLE PIECE, AND A RECESSED PORTION FORMED IN SAID POLE PIECE AND FORMING AIR GAP BETWEEN SAID POLE PIECE AND SAID POLE CAP; A MAGNETIC DISK DISPOSED IN EACH SUCH AIR GAP; AND ADJUSTABLE MEANS COUPLED TO EACH SAID DISK AND DISPOSED WITHIN EACH SAID MEMBER, AND MEANS PROVIDING A FULCRUM WITHIN THE RECESSED PORTION OF EACH POLE PIECE FOR CHANIGN THE SHAPE OF EACH SUCH DISK TO VARY THE MAGNETIC FIELD BETWEEN THE POLE MEMBERS.
Claim 2
Dependent Claim
109 words
AN ADJUSTABLE MAGNET COMPRISING: A PAIR OF MAGNETIC POLE MEMBERS SPACED IN OPPOSITION AND DEFINING A NONMAGNETIC GAP, EACH MEMBER COMPRISING A MAGNETIC POLE PIECE AND A MAGNETIC POLE CAP JOINED TO SAID POLE PIECE, AND A RECESSED PORTION FORMED IN SAID POLE PIECE AND FORMING AIR GAP BETWEEN SAID POLE PIECE AND SAID POLE CAP; A MAGNETIC DISK DISPOSED IN EACH SUCH AIR GAP; AND ADJUSTABLE MEANS COUPLED TO EACH SAID DISK AND DISPOSED WITHIN EACH SAID MEMBER, AND MEANS PROVIDING A FULCRUM WITHIN THE RECESSED PORTION OF EACH POLE PIECE FOR CHANIGN THE SHAPE OF EACH SUCH DISK TO VARY THE MAGNETIC FIELD BETWEEN THE POLE MEMBERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |