US3229178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic means for stabilising the speed of a time-piece motor
Assignee: Movado Watch Co SA
•
Filing: 1962-11-20
•
Granted: 1966-01-11
•
Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 Favre Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/108; G04C3/16; G04C3/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN ELECTRONIC MOTOR COMPRISING A MOTOR HAVING A ROTOR AND A STATOR COMPRISING A DRIVE COIL FOR DRIVING SAID ROTOR AND A CONTROL COIL FOR DEVELOPING A VOLTAGE OUTPUT AND APPLIED TO SAID DRIVE COIL, AN AMPLIFIER CONNECTED TO RECEIVE THE OUTPUT OF SAID CONTROL COIL AND APPLY IT TO SAID DRIVE COIL, AN ELECTROMECHANICAL RESONATOR DRIVEN BY SAID CONTROL COIL OUTPUT FOR DEVELOPING A SECOND VOLTAGE OUTPUT PROPORTIONAL TO A RESONANT FREQUENCY OF SAID RESONATOR AND CONNECTED TO APPLY TO SAID AMPLIFIER SAID SECOND VOLTAGE IN BUCKING RELATIONSHIP TO THE FIRST MENTIONED VOLTAGE OUTPUT TO LIMIT THE SPEED OF SAID ROTOR TO A VALUE PROPORTIONAL TO SAID RESONANT FREQUENCY.
Claim 2
Dependent Claim
110 words
AN ELECTRONIC MOTOR COMPRISING A MOTOR HAVING A ROTOR AND A STATOR COMPRISING A DRIVE COIL FOR DRIVING SAID ROTOR AND A CONTROL COIL FOR DEVELOPING A VOLTAGE OUTPUT AND APPLIED TO SAID DRIVE COIL, AN AMPLIFIER CONNECTED TO RECEIVE THE OUTPUT OF SAID CONTROL COIL AND APPLY IT TO SAID DRIVE COIL, AN ELECTROMECHANICAL RESONATOR DRIVEN BY SAID CONTROL COIL OUTPUT FOR DEVELOPING A SECOND VOLTAGE OUTPUT PROPORTIONAL TO A RESONANT FREQUENCY OF SAID RESONATOR AND CONNECTED TO APPLY TO SAID AMPLIFIER SAID SECOND VOLTAGE IN BUCKING RELATIONSHIP TO THE FIRST MENTIONED VOLTAGE OUTPUT TO LIMIT THE SPEED OF SAID ROTOR TO A VALUE PROPORTIONAL TO SAID RESONANT FREQUENCY.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |