US3089077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor converters
Assignee: Basler Electric Co
•
Filing: 1958-10-06
•
Granted: 1963-05-07
•
Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 Robert H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:28
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/5381
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DEVICE FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT COMPRISING A POWER TRANSFORMER, A SOURCE OF DIRECT CURRENT HAVING TWO OUTPUT TERMINALS, TWO TRANSISTORS EACH HAVING A BASE, AN EMITTER AND A COLLECTOR, THE EMITTERS BEING PERMANTLY CONNECTED TO ONE TERMINAL OF THE SOURCE OF DURECT CURRENT BY A COMMON LEAD, SWITCHING-SIGNAL MEANS CONNECTED ACROSS THE BASES OF THE TRANSISTORS AND THE COMMON LEAD TO THE SOURCE OF DIRECT CURRENT FOR EMANATING CYCLICALLY ALTERNATING SIGNALS AND THEREBY ALTERNATELY BIASING THE TRANSISTORS SO AS TO ALTERNATELY ALLOW CONDUCTION AND BLOCK CONDUCTION THERETHROUGH, AND A CURRENT TRANSFORMER HAVING TWO POWER WINDINGS, ONE END OF EACH POWER WINDING BEING CONNECTED ACROSS THE PRIMARY OF THE POWER TRANSFORMER AND THE OTHER ENDS OF SAID POWER WINDINGS BEING RESPECTIVELY CONNECTED TO THE COLLECTORS OF THE TRANSISTORS, SAID CUR-
Claim 2
Independent Claim
133 words
A DEVICE FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT COMPRISING A POWER TRANSFORMER, A SOURCE OF DIRECT CURRENT HAVING TWO OUTPUT TERMINALS, TWO TRANSISTORS EACH HAVING A BASE, AN EMITTER AND A COLLECTOR, THE EMITTERS BEING PERMANTLY CONNECTED TO ONE TERMINAL OF THE SOURCE OF DURECT CURRENT BY A COMMON LEAD, SWITCHING-SIGNAL MEANS CONNECTED ACROSS THE BASES OF THE TRANSISTORS AND THE COMMON LEAD TO THE SOURCE OF DIRECT CURRENT FOR EMANATING CYCLICALLY ALTERNATING SIGNALS AND THEREBY ALTERNATELY BIASING THE TRANSISTORS SO AS TO ALTERNATELY ALLOW CONDUCTION AND BLOCK CONDUCTION THERETHROUGH, AND A CURRENT TRANSFORMER HAVING TWO POWER WINDINGS, ONE END OF EACH POWER WINDING BEING CONNECTED ACROSS THE PRIMARY OF THE POWER TRANSFORMER AND THE OTHER ENDS OF SAID POWER WINDINGS BEING RESPECTIVELY CONNECTED TO THE COLLECTORS OF THE TRANSISTORS, SAID CUR-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |