Patent US3148292A successfully refreshed from Google Patents.
US3148292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear eddy-current electromagnetic actuator
Assignee: Northern Magnetics Inc
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Filing: —
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Granted: 1964-09-08
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Expires: 1981-09-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:23
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ELECTROMAGNETIC ACTUATOR COMPRISING FIRST AND SECOND MEMBERS FORMED OF MAGNETIC MATERIAL, ONE OF SAID MEMBERS BEING AN ACTUATOR AND THE OTHER BEING AN ACTUATED MEMBER, SAID FIRST MEMBER HAVING A PASSAGEWAY EXTENDING THERETHROUGH, SAID SECOND MEMBER BEING DISPOSED WITHIN THE PASSAGEWAY IN SAID FIRST MEMBER FOR LONGITUDINAL MOVEMENT RELATIVE THERETO AND HAVING A CROSS SECTION DIMENSIONED TO DEFINE AN AIR GAP BETWEEN SAID MEMBERS, A CONTINUOUS HOLLOW CONDUCTOR EXTENDING ABOUT THE SECOND MEMBER AND THROUGHOUT THE LENGTH OF THE AIR GAP, SAID CONDUCTOR BEING SECURED TO ONE OF SAID MEMBERS FOR MOVEMENT THEREWITH, A PLURALITY OF SPACIALLY DISPLACED WINDINGS MOUNTED ON AND DISTRIBUTED ALONG THE
Claim 2
Dependent Claim
106 words
AN ELECTROMAGNETIC ACTUATOR COMPRISING FIRST AND SECOND MEMBERS FORMED OF MAGNETIC MATERIAL, ONE OF SAID MEMBERS BEING AN ACTUATOR AND THE OTHER BEING AN ACTUATED MEMBER, SAID FIRST MEMBER HAVING A PASSAGEWAY EXTENDING THERETHROUGH, SAID SECOND MEMBER BEING DISPOSED WITHIN THE PASSAGEWAY IN SAID FIRST MEMBER FOR LONGITUDINAL MOVEMENT RELATIVE THERETO AND HAVING A CROSS SECTION DIMENSIONED TO DEFINE AN AIR GAP BETWEEN SAID MEMBERS, A CONTINUOUS HOLLOW CONDUCTOR EXTENDING ABOUT THE SECOND MEMBER AND THROUGHOUT THE LENGTH OF THE AIR GAP, SAID CONDUCTOR BEING SECURED TO ONE OF SAID MEMBERS FOR MOVEMENT THEREWITH, A PLURALITY OF SPACIALLY DISPLACED WINDINGS MOUNTED ON AND DISTRIBUTED ALONG THE
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |