US3134933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable gap magnet
Assignee: Varian Medical Systems Inc
•
Filing: 1962-08-13
•
Granted: 1964-05-26
•
Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 William J Brand
- 👤 Ralph T Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN ADJUSTABLE AIR GAP MAGNET STRUCTURE COMPRISING A YOKE, A PAIR OF ELECTRICAL COIL ASSEMBLIES SECURED ON SAID YOKE, AND A PAIR OF POLE PIECE ASSEMBLIES MOUNTED ON SAID YOKE AND EXTENDING TOWARD EACH OTHER THROUGH ASSOCIATED ONES OF SAID ELECTRICAL COIL ASSEMBLIES TO FORM AN AIR GAP THEREBETWEEN, EACH POLE PIECE ASSEMBLY COMPRISING A CYLINDRICAL POLE PIECE HAVING A PLURALITY OF LONGITUDINALLY DIRECTED, SPACED-APART FLAT SURFACES ON THE OUTER SURFACE THEREOF, A HOLLOW CYLINDRICAL SLEEVE IN WHICH SAID CYLINDRICAL POLE PIECE IS SLIDEABLY MOUNTED, A PLURALITY OF PRESSURE PADS SECURED IN SAID SLEEVE, THE INNER ENDS OF SAID PADS EXTENDING INTO SLIDING CONTACT WITH ASSOCIATED ONES OF FLAT SURFACES ON SAID POLE PIECE, AND ADJUSTABLE MEANS MOUNTED ON SAID SLEEVE AND ENGAGING THE OUTER ENDS OF SAID PRESSURE PADS AND EXERTING AN INWARDLY DIRECTED PRESSURE THEREON WHEREBY SAID PRESSURE PADS ARE TENSIONED AGAINST THE FLAT SURFACES OF THE SAID POLE PIECE TO MAINTAIN SAID SLIDEABLE POLE PIECE ALIGNED WITHIN SAID YOKE AND COIL ASSEMBLIES.
Claim 2
Dependent Claim
165 words
AN ADJUSTABLE AIR GAP MAGNET STRUCTURE COMPRISING A YOKE, A PAIR OF ELECTRICAL COIL ASSEMBLIES SECURED ON SAID YOKE, AND A PAIR OF POLE PIECE ASSEMBLIES MOUNTED ON SAID YOKE AND EXTENDING TOWARD EACH OTHER THROUGH ASSOCIATED ONES OF SAID ELECTRICAL COIL ASSEMBLIES TO FORM AN AIR GAP THEREBETWEEN, EACH POLE PIECE ASSEMBLY COMPRISING A CYLINDRICAL POLE PIECE HAVING A PLURALITY OF LONGITUDINALLY DIRECTED, SPACED-APART FLAT SURFACES ON THE OUTER SURFACE THEREOF, A HOLLOW CYLINDRICAL SLEEVE IN WHICH SAID CYLINDRICAL POLE PIECE IS SLIDEABLY MOUNTED, A PLURALITY OF PRESSURE PADS SECURED IN SAID SLEEVE, THE INNER ENDS OF SAID PADS EXTENDING INTO SLIDING CONTACT WITH ASSOCIATED ONES OF FLAT SURFACES ON SAID POLE PIECE, AND ADJUSTABLE MEANS MOUNTED ON SAID SLEEVE AND ENGAGING THE OUTER ENDS OF SAID PRESSURE PADS AND EXERTING AN INWARDLY DIRECTED PRESSURE THEREON WHEREBY SAID PRESSURE PADS ARE TENSIONED AGAINST THE FLAT SURFACES OF THE SAID POLE PIECE TO MAINTAIN SAID SLIDEABLE POLE PIECE ALIGNED WITHIN SAID YOKE AND COIL ASSEMBLIES.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |