US3242415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverters
Assignee: Siemens Mobility Ltd
•
Filing: 1962-01-02
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Granted: 1966-03-22
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G King
- 👤 Garbett Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:24
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523; H02M7/519
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
AN INVERTER CIRCUIT COMPRISING A DIRECT CURRENT SOURCE, TWO SEMICONDUCTOR SWITCHING DEVICES CONNECTED TO SAID SOURCE AND ADAPTED TO BE OPERATED AT A PREDETERMINED FREQUENCY CYCLICALLY AND ALTERNATELY IN OPPOSITE DIRECTIONS, AN OUTPUT CIRCUIT INCLUDING A LOAD AND A CAPACITOR IN PARALLEL, A PAIR OF RESONANT CIRCUITS EACH CONNECTED IN SERIES WITH A SAID SWITCHING DEVICE AND EACH INCLUDING SAID CAPACITOR AND AN INDUCTOR, SAID RESONANT CIRCUITS HAVING A RESONANT FREQUENCY NOT LESS THAN THE OPERATING FREQUENCY, EACH SAID INDUCTOR BEING IN SERIES WITH THE CIRCUIT INCLUDING SAID CAPACITOR AND LOAD IN PARALLEL, AND A PAIR OF RECTIFIERS EACH CONNECTED IN REVERSE PARALLEL WITH A SAID SWITCHING DEVICE WHEREBY WHEN EACH SWITCHING DEVICE IS SWITCHED OFF, ITS ASSOCIATED RECTIFIER PERMITS THE REVERSE FLOW OF CURRENT IN AND UNDER THE EFFECT OF THE ASSOCIATED RESONANT CIRCUIT TO ASSIST THE DISCHARGE OF THE CAPACITOR AND ITS RECHARGING WITH OPPOSITE POLARITY BY THE FLOW OF CURRENT THROUGH THE OTHER SWITCHING DEVICE IN THE OTHER RESONANT CIRCUIT, THIS EFFECT BEING REPEATED CYCLICALLY AND ALTERNATELY.
Claim 2
Dependent Claim
170 words
AN INVERTER CIRCUIT COMPRISING A DIRECT CURRENT SOURCE, TWO SEMICONDUCTOR SWITCHING DEVICES CONNECTED TO SAID SOURCE AND ADAPTED TO BE OPERATED AT A PREDETERMINED FREQUENCY CYCLICALLY AND ALTERNATELY IN OPPOSITE DIRECTIONS, AN OUTPUT CIRCUIT INCLUDING A LOAD AND A CAPACITOR IN PARALLEL, A PAIR OF RESONANT CIRCUITS EACH CONNECTED IN SERIES WITH A SAID SWITCHING DEVICE AND EACH INCLUDING SAID CAPACITOR AND AN INDUCTOR, SAID RESONANT CIRCUITS HAVING A RESONANT FREQUENCY NOT LESS THAN THE OPERATING FREQUENCY, EACH SAID INDUCTOR BEING IN SERIES WITH THE CIRCUIT INCLUDING SAID CAPACITOR AND LOAD IN PARALLEL, AND A PAIR OF RECTIFIERS EACH CONNECTED IN REVERSE PARALLEL WITH A SAID SWITCHING DEVICE WHEREBY WHEN EACH SWITCHING DEVICE IS SWITCHED OFF, ITS ASSOCIATED RECTIFIER PERMITS THE REVERSE FLOW OF CURRENT IN AND UNDER THE EFFECT OF THE ASSOCIATED RESONANT CIRCUIT TO ASSIST THE DISCHARGE OF THE CAPACITOR AND ITS RECHARGING WITH OPPOSITE POLARITY BY THE FLOW OF CURRENT THROUGH THE OTHER SWITCHING DEVICE IN THE OTHER RESONANT CIRCUIT, THIS EFFECT BEING REPEATED CYCLICALLY AND ALTERNATELY.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |