Patent US3308391A successfully refreshed from Google Patents.
US3308391A
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US
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Regulated variable frequency power supply having means for voerload protection
Assignee: DRESSEN BARNES ELECTRONICS COR
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Filing: 1963-12-23
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Granted: 1967-03-07
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Bernard F Mcnamee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:29
CPC Classifications
H; H03; H03L; H03L5/00; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN AN A.C. POWER SUPPLY: AN OSCILLATOR; AN AMPLIFIER HAVING A CLASS A AMPLIFIER STAGE COUPLED TO AND DRIVEN BY SAID OSCILLATOR AND A POWER STAGE; A COUPLING BETWEEN SAID STAGES; A SWITCHING MEANS OPERABLE TO SHUNT THE COUPLING FOR PREVENTING THE APPLICATION OF THE OSCILLATOR SIGNAL TO SAID POWER STAGE; MEANS INCLUDING RESETTABLE MEANS SENSITIVE TO ABSOLUTE VALUE OF LOAD CURRENT FOR OPERATING SAID SWITCHING MEANS; AND SAID RESETTABLE MEANS HOLDING THE SWITCHING MEANS OPERABLE TO SHUNT SAID COUPLING.
Claim 2
Dependent Claim
80 words
IN AN A.C. POWER SUPPLY: AN OSCILLATOR; AN AMPLIFIER HAVING A CLASS A AMPLIFIER STAGE COUPLED TO AND DRIVEN BY SAID OSCILLATOR AND A POWER STAGE; A COUPLING BETWEEN SAID STAGES; A SWITCHING MEANS OPERABLE TO SHUNT THE COUPLING FOR PREVENTING THE APPLICATION OF THE OSCILLATOR SIGNAL TO SAID POWER STAGE; MEANS INCLUDING RESETTABLE MEANS SENSITIVE TO ABSOLUTE VALUE OF LOAD CURRENT FOR OPERATING SAID SWITCHING MEANS; AND SAID RESETTABLE MEANS HOLDING THE SWITCHING MEANS OPERABLE TO SHUNT SAID COUPLING.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |