Patent US3374414A successfully refreshed from Google Patents.
US3374414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply apparatus converting d.c. to a stepped wave for approximating a sine wav
Assignee: United States Department of the Navy
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Filing: 1964-03-25
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Granted: 1968-03-19
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Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 James R Garnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:28
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/5381; H02M1/00; H02M1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A SINE WAVE APPROXIMATION POWER SUPPLY HAVING A THREE-PHASE OUTPUT COMPRISING: A PLURALITY OF OUTPUT LINKED SQUARE WAVE POWER SUPPLIES DIVIDED IN THREE GROUPS EACH HAVING A SECOND PLURALITY OF OUTPUT LINKED SQUARE WAVE POWER SUPPLIES, SAID SQUARE WAVES IN EACH OF SAID GROUPS BEING SUCCESSIVELY OUT OF PHASE WITH THE OTHER SAID WAVES IN THE SAME SAID GROUP BY A PREDETERMINED AMOUNT WHICH IS AN INTEGRAL DIVISION OF 360*, EACH OF SAID SQUARE WAVE POWER SUPPLIES COMPRISING: A PAIR OF SILICON CONTROLLED RECTIFIERS EACH HAVING A GATE, AN ANODE AND A GROUNDED CATHODE; A FIRST TRANSFORMER HAVING AN INPUT COIL AND AN OUTPUT COIL, THE INPUT COIL BEING CONNECTED ACROSS THE ANODES OF SAID RECTIFIERS; A VOLTAGE SUPPLY CONNECTED FROM GROUND TO THE CENTER OF SAID INPUT COIL; AND MEANS TO SUPPLY TO THE GATES OF SAID RECTIFIERS A PAIR OF INPUT SQUARE WAVES 180* OUT OF PHASE WITH EACH OTHER OF MAGNITUDE SUFFICIENT TO CAUSE CONDUCTION DURING ONE-HALF THE CYCLE, EACH PAIR OF INPUT SQUARE WAVES BEING OUT OF PHASE WITH THE PAIRS OF WAVES IN SUCCESSIVE SQUARE WAVE
Claim 2
Dependent Claim
181 words
A SINE WAVE APPROXIMATION POWER SUPPLY HAVING A THREE-PHASE OUTPUT COMPRISING: A PLURALITY OF OUTPUT LINKED SQUARE WAVE POWER SUPPLIES DIVIDED IN THREE GROUPS EACH HAVING A SECOND PLURALITY OF OUTPUT LINKED SQUARE WAVE POWER SUPPLIES, SAID SQUARE WAVES IN EACH OF SAID GROUPS BEING SUCCESSIVELY OUT OF PHASE WITH THE OTHER SAID WAVES IN THE SAME SAID GROUP BY A PREDETERMINED AMOUNT WHICH IS AN INTEGRAL DIVISION OF 360*, EACH OF SAID SQUARE WAVE POWER SUPPLIES COMPRISING: A PAIR OF SILICON CONTROLLED RECTIFIERS EACH HAVING A GATE, AN ANODE AND A GROUNDED CATHODE; A FIRST TRANSFORMER HAVING AN INPUT COIL AND AN OUTPUT COIL, THE INPUT COIL BEING CONNECTED ACROSS THE ANODES OF SAID RECTIFIERS; A VOLTAGE SUPPLY CONNECTED FROM GROUND TO THE CENTER OF SAID INPUT COIL; AND MEANS TO SUPPLY TO THE GATES OF SAID RECTIFIERS A PAIR OF INPUT SQUARE WAVES 180* OUT OF PHASE WITH EACH OTHER OF MAGNITUDE SUFFICIENT TO CAUSE CONDUCTION DURING ONE-HALF THE CYCLE, EACH PAIR OF INPUT SQUARE WAVES BEING OUT OF PHASE WITH THE PAIRS OF WAVES IN SUCCESSIVE SQUARE WAVE
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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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |