US3219906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power conversion device with voltage regulated output
Assignee: Lockheed Martin Corp
•
Filing: 1961-08-25
•
Granted: 1965-11-23
•
Expires: 1981-08-25
Abstract
No abstract record available.
Inventors
- 👤 Carl H Keller
- 👤 Josephson Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:17
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
169 words
A D.C. INVERTER COMPRISING A TRANSFORMER HAVING AN INPUT WINDING, AN OUTPUT WINDING A CORE HAVING THE CHARACTERISTIC OF THE PRODUCT OF THE APPLIED VOLTAGE AND THE SWITCHING TIME TO SATURATION BEING ABOUT CONSTANT, ONE SIDE OF SAID D.-C. POWER SOURCE OPERATIVELY CONNETED TO THE CENTER TAP OF SAID INPUT WINDING, A FIRST TRANSISTOR HAVING THE COLLECTOR CONNECTED TO ONE END OF SAID INPUT WINDING AND THE EMITTER CONNECTED TO THE OTHER SIDE OF SAID D.-C. POWER SOURCE, A SECOND TRANSISTOR HAVING THE COLLECTOR CONNECTED TO THE OTHER END OF SAID INPUT WINDING AND THE EMITTER CONNECTED TO THE OTHER SIDE OF SAID D.-C. POWER SOURCE, FIRST AND SECOND SILICON CONTROLLED RECTIFIERS RESPECTIVELY OPERATIVELY CONNECTED TO THE BASES OF SAID FIRST AND SECOND TRANSISTORS FOR TURNING SAID FIRST AND SECOND TRANSISTORS IN THE " ON" AND "OFF" POSITIONS, MEANS OPERATIVELY CONNECTED TO SAID TRANSFORMER AND SENSING THE SATURATION STATES OF SAID TRANSFORMER, SAID MEANS OPERATIVELY CONNECTED TO SAID SILICON CONTROLLED RECTIFIERS FOR TURNING "OFF" SAID FIRST AND SECOND TRANSISTORS.
Claim 2
Dependent Claim
169 words
A D.C. INVERTER COMPRISING A TRANSFORMER HAVING AN INPUT WINDING, AN OUTPUT WINDING A CORE HAVING THE CHARACTERISTIC OF THE PRODUCT OF THE APPLIED VOLTAGE AND THE SWITCHING TIME TO SATURATION BEING ABOUT CONSTANT, ONE SIDE OF SAID D.-C. POWER SOURCE OPERATIVELY CONNETED TO THE CENTER TAP OF SAID INPUT WINDING, A FIRST TRANSISTOR HAVING THE COLLECTOR CONNECTED TO ONE END OF SAID INPUT WINDING AND THE EMITTER CONNECTED TO THE OTHER SIDE OF SAID D.-C. POWER SOURCE, A SECOND TRANSISTOR HAVING THE COLLECTOR CONNECTED TO THE OTHER END OF SAID INPUT WINDING AND THE EMITTER CONNECTED TO THE OTHER SIDE OF SAID D.-C. POWER SOURCE, FIRST AND SECOND SILICON CONTROLLED RECTIFIERS RESPECTIVELY OPERATIVELY CONNECTED TO THE BASES OF SAID FIRST AND SECOND TRANSISTORS FOR TURNING SAID FIRST AND SECOND TRANSISTORS IN THE " ON" AND "OFF" POSITIONS, MEANS OPERATIVELY CONNECTED TO SAID TRANSFORMER AND SENSING THE SATURATION STATES OF SAID TRANSFORMER, SAID MEANS OPERATIVELY CONNECTED TO SAID SILICON CONTROLLED RECTIFIERS FOR TURNING "OFF" SAID FIRST AND SECOND TRANSISTORS.
References Cited (Backward Citations)
US2748274A
Cited
US2983860A
Cited
US3079525A
Cited
US3117270A
Cited
DE1110298B
Cited
US2971166A
Cited
US3030589A
Cited
US3048764A
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 |