Patent US3214671A successfully refreshed from Google Patents.
US3214671A
Expired / Lapsed
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Inverter system
Assignee: Sierracin Corp
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Filing: 1962-09-13
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Granted: 1965-10-26
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Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Edward J Corey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/483; H02M7/49
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
180 words
AN INVERTER SYSTEM FOR CONVERTING THE DIRECT CURRENT VOLTAGE FROM A DIRECT CURRENT SOURCE INTO A POLYPHASE ALTERNATING CURRENT OUTPUT, SAID INVERTER SYSTEM COMPRISING A POLYPHASE POWER OUTPUT TRANSFORMER INCLUDING A MAGNETIC CORE, A PLURALITY OF PRIMARY WINDINGS WOUND ON SAID CORE, AND A PLURALITY OF SECONDARY WINDINGS WOUND ON SAID CORE, COMMUTATING MEANS COUPLED TO THE DIRECT CURRENT SOURCE AND TO THE PRIMARY WINDINGS OF SAID TRANSFORMER AND INCLUDING A PLURALITY OF SILICON CONTROLLED RECTIFIERS, MEANS COUPLING EACH OF SAID SILICON CONTROLLED RECTIFIERS BETWEEN SAID DIRECT CURRENT SOURCE AND A RESPECTIVE ONE OF SAID PLURALITY OF PRIMARY WINDINGS, MEANS FOR GENERATING A SEQUENCE OF FIRST AND SECOND PULSES, MEANS FOR SEQUENTIALLY APPLYING SAID FIRST PULSES TO SAID SILICON CONTROLLED RECTIFIERS TO RENDER THEM SEQUENTIALLY CONDUCTIVE, CAPACITOR MEANS, MEANS TO APPLY SAID SECOND PULSES TO SAID CAPACITOR MEANS, SAID CAPACITOR MEANS RESPONSIVE TO THE APPLICATION OF SAID SECOND PULSES TO RENDER NONCONDUCTIVE THE SILICON CONTROLLED RECTIFIER WHICH IS CONDUCTIVE AT THE TIME ONE OF SAID FIRST PULSES IS APPLIED TO THE NEXT SUCCEEDING SILICON CONTROLLED RECTIFIER TO RENDER IT CONDUCTIVE.
References Cited (Backward Citations)
US2193421A
Cited
US3060363A
Cited
US3052833A
Cited
US3091729A
Cited
US3118106A
Cited
US3100851A
Cited
US3085190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |