US3219907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power conversion device
Assignee: Lockheed Martin Corp
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Filing: 1962-01-08
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Granted: 1965-11-23
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Josephson Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:10
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3376; H02M3/3378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
AN INVERTER DEVICE COMPRISING A FIRST TRANSFORMER INCLUDING AN INPUT WINDING AND AN OUTPUT WINDING, A POWER SOURCE OPERATIVELY CONNECTED TO SAID INPUT WINDING, A FIRST PAIR OF TRANSISTORS EACH HAVING ITS BASE OPERATIVELY CONNECTED TO AN END OF SAID OUTPUT WINDING AND ITS COLLECTOR CONNECTED TO AN END OF SAID INPUT WINDING, A SECOND TRANSFORMER INCLUDING AN INPUT WINDING AND AN OUTPUT WINDING, ONE END OF THE INPUT WINDING OF SAID SECOND TRANSFORMER OPERATIVELY CONNECTED TO THE INPUT WINDING OF SAID FIRST TRANSFORMER, A SECOND PAIR OF TRANSISTORS EACH HAVING ITS BASE OPERATIVELY CONNECTED TO THE EMIITTER OF ONE OF SAID FIRST TRANSISTORS AND EACH HAVING ITS EMITTER OPERATIVELY CONNECTED TO GROUND, A LOAD MEANS OPERATIVELY CONNECTED TO THE OUTPUT WINDING OF SAID SECOND TRANSFORMER, WHEREBY THE RATIO OF THE CURRENT SUPPLY TO THE COLLECTORS OF EACH TRANSISTOR FROM THE INPUT WINDING OF SAID SECOND TRANSFORMER TO THE CURRENT SUPPLY TO THE BASE OF EACH TRANSISTOR FROM THE INPUT WINDING OF SAID FIRST TRANSFORMER BEING SUBSTANTIALLY CONSTANT IRRESPECTIVE OF THE LOAD APPLIED TO THE OUTPUT WINDING OF SAID SECOND TRANSFORMER.
Claim 2
Dependent Claim
181 words
AN INVERTER DEVICE COMPRISING A FIRST TRANSFORMER INCLUDING AN INPUT WINDING AND AN OUTPUT WINDING, A POWER SOURCE OPERATIVELY CONNECTED TO SAID INPUT WINDING, A FIRST PAIR OF TRANSISTORS EACH HAVING ITS BASE OPERATIVELY CONNECTED TO AN END OF SAID OUTPUT WINDING AND ITS COLLECTOR CONNECTED TO AN END OF SAID INPUT WINDING, A SECOND TRANSFORMER INCLUDING AN INPUT WINDING AND AN OUTPUT WINDING, ONE END OF THE INPUT WINDING OF SAID SECOND TRANSFORMER OPERATIVELY CONNECTED TO THE INPUT WINDING OF SAID FIRST TRANSFORMER, A SECOND PAIR OF TRANSISTORS EACH HAVING ITS BASE OPERATIVELY CONNECTED TO THE EMIITTER OF ONE OF SAID FIRST TRANSISTORS AND EACH HAVING ITS EMITTER OPERATIVELY CONNECTED TO GROUND, A LOAD MEANS OPERATIVELY CONNECTED TO THE OUTPUT WINDING OF SAID SECOND TRANSFORMER, WHEREBY THE RATIO OF THE CURRENT SUPPLY TO THE COLLECTORS OF EACH TRANSISTOR FROM THE INPUT WINDING OF SAID SECOND TRANSFORMER TO THE CURRENT SUPPLY TO THE BASE OF EACH TRANSISTOR FROM THE INPUT WINDING OF SAID FIRST TRANSFORMER BEING SUBSTANTIALLY CONSTANT IRRESPECTIVE OF THE LOAD APPLIED TO THE OUTPUT WINDING OF SAID SECOND TRANSFORMER.
References Cited (Backward Citations)
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Cited
US2987664A
Cited
US3117270A
Cited
US3012181A
Cited
US3004206A
Cited
US3119056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |