US3407349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter circuit
Assignee: Unisys Corp
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Filing: 1961-12-26
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Granted: 1968-10-22
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Alvin E Lehrer
- 👤 Jr Clinton C Remuzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
165 words
AN INVERTER CIRCUIT COMPRISING: (A) A FIRST AND A SECOND CONTROLLED RECTIFIER, (B) A COMMUTATING CAPACITOR HAVING ONE OF ITS TERMINALS CONNECTED TO THE ANODE OF THE FIRST CONTROLLED RECTIFIER AND ITS OTHER TERMINAL CONNECTED TO THE ANODE OF THE SECOND CONTROLLED RECTIFIER, (C) FIRST AND SECOND TRANSIENT SUPPRESSOR DIODES, SAID FIRST AND SECOND TRANSIENT SUPPRESSOR DIODES HAVING THEIR CATHODES CONNECTED TO THE ANODES OF THE FIRST AND SECOND CONTROLLED RECTIFIERS RESPECTIVELY, (D) AN OUTPUT TRANSFORMER HAVING A CENTER-TAPPED PRIMARY WINDING, SAID OUTPUT TRANSFORMER FURTHER HAVING OPPOSITE ENDS OF ITS PRIMARY WINDING CONNECTED TO THE ANODES OF THE FIRST AND SECOND SUPPRESSOR DIODES RESPECTIVELY, (E) A COMMON COUPLING MEANS COUPLING THE CATHODES OF BOTH CONTROLLED RECTIFIERS TO A NEGATIVE INPUT TERMINAL, (F) AN EXCITATION MEANS CONNECTED TO THE GATE ELECTRODE OF EACH CONTROLLED RECTIFIER, (G) A SOURCE OF RECTANGULAR PULSES IN SAID EXCITATION MEANS, SAID SOURCE BEING ADJUSTED TO PROVIDE A TIME INTERVAL BETWEEN SUCCESSIVE PULSES THAT EXCEEDS THE CHARGING TIME OF THE COMMUTATING CAPACITOR.
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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |