Patent US3264548A successfully refreshed from Google Patents.
US3264548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D. c. to a. c. inverter circuits
Assignee: Siemens Mobility Ltd
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Filing: 1962-04-12
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Granted: 1966-08-02
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Expires: 1982-04-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/40; H02M1/08; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/517; H02M7/53; H02M7/537; H02M7/5383; H02M7/53846; H02M7/53862
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN INVERTER CIRCUIT ARRANGEMENT COMPRISING AN INPUT TERMINAL AND A TERMINAL OF AN OUTPUT TRANSFORMER, A FIRST SWITCHING DEVICE VIA WHICH SAID INPUT TERMINAL IS INTERMITTENTLY CONNECTABLE TO THE TERMINAL OF THE OUTPUT TRANSFORMER, A CAPACITOR WHICH IS CHARGEABLE VIA SAID SWITCHING DEVICE FROM SAID INPUT TERMINAL, A FURTHER SWITCHING DEVICE WHICH WHEN RENDERED CONDUCTING CONNECTS SAID CAPACITOR ACROSS SAID FIRST SWITCHING DEVICE TO RENDER THE LATTER NON-CONDUCTING, A DRIVER CIRCUIT FOR SAID SWITCHING DEVICE OPERABLE TO RENDER THEM CONDUCTING IN TURN, SAID DRIVER CIRCUIT HAVING AN INPUT TERMINAL CONNECTED VIA A DELAY CIRCUIT SUCH THAT WHEN THE OPERATING SUPPLY IS APPLIED THERETO, THE VOLTAGE EFFECTIVE TO CONTROL THE FREQUENCY OF OPERATION OF THE DRIVER CIRCUIT IS SUCH AS TO CAUSE THE STARTING FREQUENCY TO BE GREATER THAN WHEN NORMAL OPERATION IS ESTABLISHED.
Claim 2
Dependent Claim
133 words
AN INVERTER CIRCUIT ARRANGEMENT COMPRISING AN INPUT TERMINAL AND A TERMINAL OF AN OUTPUT TRANSFORMER, A FIRST SWITCHING DEVICE VIA WHICH SAID INPUT TERMINAL IS INTERMITTENTLY CONNECTABLE TO THE TERMINAL OF THE OUTPUT TRANSFORMER, A CAPACITOR WHICH IS CHARGEABLE VIA SAID SWITCHING DEVICE FROM SAID INPUT TERMINAL, A FURTHER SWITCHING DEVICE WHICH WHEN RENDERED CONDUCTING CONNECTS SAID CAPACITOR ACROSS SAID FIRST SWITCHING DEVICE TO RENDER THE LATTER NON-CONDUCTING, A DRIVER CIRCUIT FOR SAID SWITCHING DEVICE OPERABLE TO RENDER THEM CONDUCTING IN TURN, SAID DRIVER CIRCUIT HAVING AN INPUT TERMINAL CONNECTED VIA A DELAY CIRCUIT SUCH THAT WHEN THE OPERATING SUPPLY IS APPLIED THERETO, THE VOLTAGE EFFECTIVE TO CONTROL THE FREQUENCY OF OPERATION OF THE DRIVER CIRCUIT IS SUCH AS TO CAUSE THE STARTING FREQUENCY TO BE GREATER THAN WHEN NORMAL OPERATION IS ESTABLISHED.
References Cited (Backward Citations)
US2937290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |