Patent US3149254A successfully refreshed from Google Patents.
US3149254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear motor or generator
Assignee: Bristol Inc
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Filing: 1961-08-07
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Granted: 1964-09-15
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Carter
- 👤 Glen D Sumerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:32
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A LINEAR MOTOR-GENERATOR COMPRISING A PERMANENT MAGNET, AN INNER POLE PIECE EXTENDING FROM ONE POLE OF SAID MAGNET, A MAGNETIC-TRANSFER HOUSING CONNECTED TO AND PARTLY ENCLOSING SAID MAGNET AND INNER POLE PIECE, AN OUTER POLE PIECE CARRIED BY AND WITHIN THE MAGNETICTRANSFER HOUSING AROUND AND PARTLY COEXTENSIVE WITH THE INNER POLE PIECE, THE INNER POLE PIECE BEING OF SIMILAR POLARITY TO THE POLE OF THE MAGNET FROM WHICH IT EXTENDS, THE OUTER POLE PIECE BEING OF OPPOSITE POLARITY TO THE INNER POLE PIECE, SAID TWO POLE PIECES DEFINING AN ELONGATED AND ANNULAR FLUX CAVITY THEREBETWEEN, AND A FREE, MOVABLE COIL IN SAID CAVITY.
Claim 2
Dependent Claim
103 words
A LINEAR MOTOR-GENERATOR COMPRISING A PERMANENT MAGNET, AN INNER POLE PIECE EXTENDING FROM ONE POLE OF SAID MAGNET, A MAGNETIC-TRANSFER HOUSING CONNECTED TO AND PARTLY ENCLOSING SAID MAGNET AND INNER POLE PIECE, AN OUTER POLE PIECE CARRIED BY AND WITHIN THE MAGNETICTRANSFER HOUSING AROUND AND PARTLY COEXTENSIVE WITH THE INNER POLE PIECE, THE INNER POLE PIECE BEING OF SIMILAR POLARITY TO THE POLE OF THE MAGNET FROM WHICH IT EXTENDS, THE OUTER POLE PIECE BEING OF OPPOSITE POLARITY TO THE INNER POLE PIECE, SAID TWO POLE PIECES DEFINING AN ELONGATED AND ANNULAR FLUX CAVITY THEREBETWEEN, AND A FREE, MOVABLE COIL IN SAID CAVITY.
References Cited (Backward Citations)
US2633020A
Cited
US2778882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |