Patent US3090897A successfully refreshed from Google Patents.
US3090897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control
Assignee: Individual
•
Filing: 1959-04-16
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Granted: 1963-05-21
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Expires: 1979-04-16
Abstract
No abstract record available.
Inventors
- 👤 John W Hammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53832; H02M7/53835; H02P6/00; H02P6/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A CONTROL CIRCUIT NETWORK FOR A TWO PHASE MOTOR HAVING A PAIR OF PHASE WINDINGS THEREIN COMPRISING AN OCSILLATOR CIRCUIT ASSOCIATED WITH BOTH OF THE MOTOR WINDINGS, EACH OF SAID OSCILLATOR CIRCUITS HAVING A PAIR OF TUNABLE CIRCUITS FORMED IN PART BY A DIFFERENT PORTION OF THE MOTOR WINDING ASSOCIATED THEREWITH,MEANS CONNECTING THE TUNABLE CIRCUITS IN EACH OSCILLATOR CIRCUIT FOR PUSHPULL OPERATION, A SOURCE OF ENERGY CONNECTED TO SAID OSCILLATOR CIRCUITS, AND MEANS IN EACH OF SAID OSCILLATOR CIRCUITS FOR CHANGING THE FREQUENCY OF OSCILLATION OF THE ASSOCIATED TUNABLE CIRCUITS.
Claim 2
Dependent Claim
90 words
A CONTROL CIRCUIT NETWORK FOR A TWO PHASE MOTOR HAVING A PAIR OF PHASE WINDINGS THEREIN COMPRISING AN OCSILLATOR CIRCUIT ASSOCIATED WITH BOTH OF THE MOTOR WINDINGS, EACH OF SAID OSCILLATOR CIRCUITS HAVING A PAIR OF TUNABLE CIRCUITS FORMED IN PART BY A DIFFERENT PORTION OF THE MOTOR WINDING ASSOCIATED THEREWITH,MEANS CONNECTING THE TUNABLE CIRCUITS IN EACH OSCILLATOR CIRCUIT FOR PUSHPULL OPERATION, A SOURCE OF ENERGY CONNECTED TO SAID OSCILLATOR CIRCUITS, AND MEANS IN EACH OF SAID OSCILLATOR CIRCUITS FOR CHANGING THE FREQUENCY OF OSCILLATION OF THE ASSOCIATED TUNABLE CIRCUITS.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |