Patent US3144596A successfully refreshed from Google Patents.
US3144596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for alternating current dynamoelectric motors
Assignee: Lear Siegler Inc
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Filing: 1961-02-27
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Granted: 1964-08-11
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Troy D Graybeal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN AN APPARATUS FOR CONTROLLING THE TORQUE DEVELOPED BY AN ALTERNATING CURRENT MOTOR HAVING A POLYPHASE FIELD WINDING AND AN ARMATURE THE COMBINATION WHICH COMPRISES A SOURCE OF ALTERNATING CURRENT ENERGIZING POTENTIAL CONNECTED TO THE ARMATURE OF THE ALTERNATING CURRENT MOTOR, AMPLIFYING EXCITING MEANS HAVING A POLYPHASE INPUT AND OUTPUT CIRCUIT FOR SUPPLYING FIELD EXCITATION TO THE MOTOR, POWER TRANSFER MEANS FOR SELECTIVELY SUPPLYING POWER TO AND RECEIVING POWER FROM THE EXCITING MEANS INDEPENDENTLY OF THE TORQUE DEVELOPED BY THE MOTOR, MEANS FOR CONNECTING THE OUTPUT CIRCUIT OF THE EXCITING MEANS TO THE FIELD WINDINGS OF THE MOTOR, MEANS RESPONSIVE TO THE FREQUENCY OF THE ALTERNATING CURRENT ENERGIZING POTENTIAL AND TO THE SPEED OF THE MOTOR FOR PRODUCING POLYPHASE REGULATING SIGNALS OF SLIP FREQUENCY AND MEANS
Claim 2
Dependent Claim
126 words
IN AN APPARATUS FOR CONTROLLING THE TORQUE DEVELOPED BY AN ALTERNATING CURRENT MOTOR HAVING A POLYPHASE FIELD WINDING AND AN ARMATURE THE COMBINATION WHICH COMPRISES A SOURCE OF ALTERNATING CURRENT ENERGIZING POTENTIAL CONNECTED TO THE ARMATURE OF THE ALTERNATING CURRENT MOTOR, AMPLIFYING EXCITING MEANS HAVING A POLYPHASE INPUT AND OUTPUT CIRCUIT FOR SUPPLYING FIELD EXCITATION TO THE MOTOR, POWER TRANSFER MEANS FOR SELECTIVELY SUPPLYING POWER TO AND RECEIVING POWER FROM THE EXCITING MEANS INDEPENDENTLY OF THE TORQUE DEVELOPED BY THE MOTOR, MEANS FOR CONNECTING THE OUTPUT CIRCUIT OF THE EXCITING MEANS TO THE FIELD WINDINGS OF THE MOTOR, MEANS RESPONSIVE TO THE FREQUENCY OF THE ALTERNATING CURRENT ENERGIZING POTENTIAL AND TO THE SPEED OF THE MOTOR FOR PRODUCING POLYPHASE REGULATING SIGNALS OF SLIP FREQUENCY AND MEANS
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |