US3265955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for initiating conduction
Assignee: Sprague Electric Co
•
Filing: 1962-07-13
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Granted: 1966-08-09
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Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 Walter J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:30
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
AN ELECTRICAL APPARATUS FOR INITIATING CONDUCTION IN A CONTROLLED RECTIFIER INCLUDING IN COMBINATION A CONTROLLED RECTIFIER HAVING AN ANODE AND A CATHODE AND A GATE, A PHASE-SHIFTING NETWORK FOR PRODUCING AN OUTPUT VOLTAGE VARIABLE IN PHASE RELATIONSHIP TO AN APPLIED ALTERNATING VOLTAGE OF SUBSTANTIALLY SINE WAVEFORM, AN NPN TRANSISTOR, A D.C. POWER SOURCE, THE COLLECTOR OF THE TRANSISTOR BEING CONNECTED TO THE POSITIVE TERMINAL OF THE POWER SOURCE, THE EMITTER OF THE TRANSISTOR BEING CONNECTED TO THE GATE OF THE RECTIFIER, THE CATHODE OF THE RECTIFIER BEING CONNECTED TO THE NEGATIVE TERMINAL OF THE POWER SOURCE, THE ANODE OF SAID RECTIFIER BEING CONNECTED THROUGH A LOAD TO SAID APPLIED ALTERNATING VOLTAGE, AND A STEP-DOWN TRANSFORMER COUPLING SAID TRANSISTOR TO SAID PHASE-SHIFTING NET-
Claim 2
Dependent Claim
122 words
AN ELECTRICAL APPARATUS FOR INITIATING CONDUCTION IN A CONTROLLED RECTIFIER INCLUDING IN COMBINATION A CONTROLLED RECTIFIER HAVING AN ANODE AND A CATHODE AND A GATE, A PHASE-SHIFTING NETWORK FOR PRODUCING AN OUTPUT VOLTAGE VARIABLE IN PHASE RELATIONSHIP TO AN APPLIED ALTERNATING VOLTAGE OF SUBSTANTIALLY SINE WAVEFORM, AN NPN TRANSISTOR, A D.C. POWER SOURCE, THE COLLECTOR OF THE TRANSISTOR BEING CONNECTED TO THE POSITIVE TERMINAL OF THE POWER SOURCE, THE EMITTER OF THE TRANSISTOR BEING CONNECTED TO THE GATE OF THE RECTIFIER, THE CATHODE OF THE RECTIFIER BEING CONNECTED TO THE NEGATIVE TERMINAL OF THE POWER SOURCE, THE ANODE OF SAID RECTIFIER BEING CONNECTED THROUGH A LOAD TO SAID APPLIED ALTERNATING VOLTAGE, AND A STEP-DOWN TRANSFORMER COUPLING SAID TRANSISTOR TO SAID PHASE-SHIFTING NET-
References Cited (Backward Citations)
US2977523A
Cited
US3088075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |