US3299369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condition responsive on-off blocking oscillator
Assignee: Westinghouse Electric Corp
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Filing: 1964-07-22
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Granted: 1967-01-17
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Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Vercellotti
- 👤 Richard A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/722; H03K17/723
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN APPARATUS FOR GATING A CONTROLLED SEMICONDUCTOR RECTIFIER ON AND OFF AS A FUNCTION OF A CHANGE IN IMPEDANCE OF A VARIABLE IMPEDANCE ELEMENT, THE COMBINATION OF A BLOCKING OSCILLATOR, A SEMICONDUCTIVE DEVICE IN THE OSCILLATOR HAVING AN EMITTER, A COLLECTOR AND A BASE, TRANSFORMER MEANS INCLUDING A FIRST FEEDBACK WINDING INDUCTIVELY COUPLING SAID COLLECTOR AND SAID BASE FOR APPLYING A POSITIVE FEEDBACK SIGNAL TO SAID BASE, MEANS INCLUDING SAID VARIABLE IMPEDANCE ELEMENT CONNECTED BETWEEN SAID BASE AND EMITTER FOR CONTROLLING CONDUCTION IN THE SEMICONDUCTIVE DEVICE AS A FUNCTION OF THE IMPEDANCE OF SAID VARIABLE IMPEDANCE ELEMENT, SAID TRANSFORMER MEANS INCLUDING A SECOND FEEDBACK WINDING RESPONSIVE TO THE CONDUCTION OF SAID SEMICONDUCTIVE DEVICE FOR PROVIDING AN ADDITIONAL POSITIVE FEEDBACK SIGNAL TO MORE RAPIDLY EFFECT THE DESIRED CONDUCTION OF SAID SEMICONDUCTIVE DEVICE, AND
Claim 2
Dependent Claim
132 words
IN APPARATUS FOR GATING A CONTROLLED SEMICONDUCTOR RECTIFIER ON AND OFF AS A FUNCTION OF A CHANGE IN IMPEDANCE OF A VARIABLE IMPEDANCE ELEMENT, THE COMBINATION OF A BLOCKING OSCILLATOR, A SEMICONDUCTIVE DEVICE IN THE OSCILLATOR HAVING AN EMITTER, A COLLECTOR AND A BASE, TRANSFORMER MEANS INCLUDING A FIRST FEEDBACK WINDING INDUCTIVELY COUPLING SAID COLLECTOR AND SAID BASE FOR APPLYING A POSITIVE FEEDBACK SIGNAL TO SAID BASE, MEANS INCLUDING SAID VARIABLE IMPEDANCE ELEMENT CONNECTED BETWEEN SAID BASE AND EMITTER FOR CONTROLLING CONDUCTION IN THE SEMICONDUCTIVE DEVICE AS A FUNCTION OF THE IMPEDANCE OF SAID VARIABLE IMPEDANCE ELEMENT, SAID TRANSFORMER MEANS INCLUDING A SECOND FEEDBACK WINDING RESPONSIVE TO THE CONDUCTION OF SAID SEMICONDUCTIVE DEVICE FOR PROVIDING AN ADDITIONAL POSITIVE FEEDBACK SIGNAL TO MORE RAPIDLY EFFECT THE DESIRED CONDUCTION OF SAID SEMICONDUCTIVE DEVICE, AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |