Patent US3142793A successfully refreshed from Google Patents.
US3142793A
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US
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Control system for standby motor armature current in an uninterrupted power supply
Assignee: General Precision Inc
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Filing: 1961-09-12
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Granted: 1964-07-28
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Expires: 1981-09-12
Abstract
No abstract record available.
Inventors
- 👤 Grillo Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:31
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/066; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y04; Y04S; Y04S20/00; Y04S20/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A POWER SUPPLY SYSTEM COMPRISING AN A.C. SOURCE, A SYNCHRONOUS MOTOR DRIVEN BY SAID A.C. SOURCE, A D.C. MOTOR, A GENERATOR, SAID SYNCHRONOUS MOTOR, SAID GENERATOR, AND SAID D.C. MOTOR BEING MECHANICALLY COUPLED TOGETHER TO RUN AT A SPEED DETERMINED BY SAID SYNCHRONOUS MOTOR, AND A D.C. SOURCE CONNECTED TO PROVIDE ARMATURE CURRENT FOR SAID D.C. MOTOR, THE IMPROVEMENT COMPRISING MEANS RESPONSIVE TO THE ARMATURE CURRENT IN SAID D.C. MOTOR TO CONTROL THE EXCITATION OF THE FIELD OF SAID D.C. MOTOR TO MAINTAIN SAID ARMATURE CURRENT CONSTANT.
Claim 2
Dependent Claim
88 words
IN A POWER SUPPLY SYSTEM COMPRISING AN A.C. SOURCE, A SYNCHRONOUS MOTOR DRIVEN BY SAID A.C. SOURCE, A D.C. MOTOR, A GENERATOR, SAID SYNCHRONOUS MOTOR, SAID GENERATOR, AND SAID D.C. MOTOR BEING MECHANICALLY COUPLED TOGETHER TO RUN AT A SPEED DETERMINED BY SAID SYNCHRONOUS MOTOR, AND A D.C. SOURCE CONNECTED TO PROVIDE ARMATURE CURRENT FOR SAID D.C. MOTOR, THE IMPROVEMENT COMPRISING MEANS RESPONSIVE TO THE ARMATURE CURRENT IN SAID D.C. MOTOR TO CONTROL THE EXCITATION OF THE FIELD OF SAID D.C. MOTOR TO MAINTAIN SAID ARMATURE CURRENT CONSTANT.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |