Patent US3149274A successfully refreshed from Google Patents.
US3149274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic vibrating drive
Assignee: Bulova Watch Co Inc
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Filing: 1962-01-17
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Granted: 1964-09-15
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Expires: 1982-01-17
Abstract
No abstract record available.
Inventors
- 👤 Hetzel Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:48
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/08; G04C3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
AN ELECTROMAGNETICALLY ACTUATED VIBRATOR COMPRISING A VIBRATORY MEMBER, A TRANSDUCER FOR ACTUATING SAID MEMBER AND INCLUDING A MAGNETIC ELEMENT ATTACHED TO SAID MEMBER AND VIBRATING THEREWITH AND FIXEDLY SUPPORTED PICK-UP AND DRIVE COILS OPERATIVELY COUPLED TO SAID MAGNETIC ELEMENT, AN AMPLIFIER COUPLED TO SAID COILS, SAID COILS BEING INTER-LINKED BY SAID ELEMENT TO PROVIDE FEEDBACK IN SAID AMPLIFIER ACTING TO SUSTAIN OSCILLATION THEREIN AND CAUSE VIBRATION OF SAID MEMBER, SAID PICK-UP COIL BEING CONSTITUTED BY TWO SERIALLY-CONNECTED PORTIONS WOUND IN COUNTER DIRECTIONS TO MINIMIZE STRAY COUPLING BETWEEN SAID DRIVE COIL AND SAID PICK-UP COIL, SAID TWO PICK-UP PORTIONS BEING SYMMETRICALLY DISPOSED RELATIVE TO SAID DRIVE COIL WHEREBY THE VOLTAGES INDUCED THEREIN BY SAID DRIVE COIL EFFECTIVELY BALANCE OUT, SAID TWO PICK-UP PORTIONS BEING SO DISPOSED RELATIVE TO SAID VIBRATING MAGNETIC ELEMENT WHEREBY THE VOLTAGES INDUCED THEREIN BY MOVEMENT OF SAID ELEMENT ARE OF UNEQUAL AMPLITUDES.
Claim 2
Dependent Claim
145 words
AN ELECTROMAGNETICALLY ACTUATED VIBRATOR COMPRISING A VIBRATORY MEMBER, A TRANSDUCER FOR ACTUATING SAID MEMBER AND INCLUDING A MAGNETIC ELEMENT ATTACHED TO SAID MEMBER AND VIBRATING THEREWITH AND FIXEDLY SUPPORTED PICK-UP AND DRIVE COILS OPERATIVELY COUPLED TO SAID MAGNETIC ELEMENT, AN AMPLIFIER COUPLED TO SAID COILS, SAID COILS BEING INTER-LINKED BY SAID ELEMENT TO PROVIDE FEEDBACK IN SAID AMPLIFIER ACTING TO SUSTAIN OSCILLATION THEREIN AND CAUSE VIBRATION OF SAID MEMBER, SAID PICK-UP COIL BEING CONSTITUTED BY TWO SERIALLY-CONNECTED PORTIONS WOUND IN COUNTER DIRECTIONS TO MINIMIZE STRAY COUPLING BETWEEN SAID DRIVE COIL AND SAID PICK-UP COIL, SAID TWO PICK-UP PORTIONS BEING SYMMETRICALLY DISPOSED RELATIVE TO SAID DRIVE COIL WHEREBY THE VOLTAGES INDUCED THEREIN BY SAID DRIVE COIL EFFECTIVELY BALANCE OUT, SAID TWO PICK-UP PORTIONS BEING SO DISPOSED RELATIVE TO SAID VIBRATING MAGNETIC ELEMENT WHEREBY THE VOLTAGES INDUCED THEREIN BY MOVEMENT OF SAID ELEMENT ARE OF UNEQUAL AMPLITUDES.
References Cited (Backward Citations)
US2959746A
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 |