US3233167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control circuit
Assignee: Robertshaw Controls Co
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Filing: 1961-03-31
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Granted: 1966-02-01
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Marlow Jacob
- 👤 Egils H Evalds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:26
CPC Classifications
H; H03; H03F; H03F9/00; H03F9/06; G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34; G05F1/38; G05F1/40; G05F1/44; G05F1/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN ELECTRICAL CIRCUIT ENERGIZED BY AN ALTERNATING VOLTAGE SOURCE COMPRISING A FIRST CIRCUIT PORTION INCLUDING A UNIDIRECTIONAL CONDUCTIVE DEVICE; A SECOND CIRCUIT PORTION INCLUDING A SATURABLE REACTOR CONNECTED IN SERIES WITH SAID FIRST CIRCUIT PORTION; A THIRD CIRCUIT PORTION, INCLUDING TWO SERIES CONNECTED IMPEDANCE ELEMENTS, AT LEAST ONE OF WHICH IS VARIABLE, CONNECTED IN PARALLEL WITH ONE OF SAID FIRST AND SECOND CIRCUIT PORTIONS; A TRANSISTOR HAVING A BASE, EMITTER, A COLLECTOR; MEANS CONNECTING SAID BASE TO A POINT INTERMEDIATE SAID SERIES CONNECTED IMPEDANCE ELEMENTS; MEANS CONNECTING SAID EMITTER TO ONE END OF SAID SERIES CONNECTED IMPEDANCE ELEMENTS; AND MEANS CONNECTING SAID COLLECTOR TO THE OTHER END OF SAID SERIES CONNECTED IMPEDANCE ELEMENTS, WHEREBY SAID TRANSISTOR CONTROLS THE CURRENT THROUGH SAID SECOND CIRCUIT PORTION IN RESPONSE TO THE IMMPEDANCE PRESENTED BY SAID IMPEDANCE ELEMENTS WHEN SAID UNIDIRECTIONAL CONDUCTIVE DEVICE IS PRESENTING A HIGH IMPEDANCE TO THE FLOW OF CURRENT.
Claim 2
Dependent Claim
149 words
AN ELECTRICAL CIRCUIT ENERGIZED BY AN ALTERNATING VOLTAGE SOURCE COMPRISING A FIRST CIRCUIT PORTION INCLUDING A UNIDIRECTIONAL CONDUCTIVE DEVICE; A SECOND CIRCUIT PORTION INCLUDING A SATURABLE REACTOR CONNECTED IN SERIES WITH SAID FIRST CIRCUIT PORTION; A THIRD CIRCUIT PORTION, INCLUDING TWO SERIES CONNECTED IMPEDANCE ELEMENTS, AT LEAST ONE OF WHICH IS VARIABLE, CONNECTED IN PARALLEL WITH ONE OF SAID FIRST AND SECOND CIRCUIT PORTIONS; A TRANSISTOR HAVING A BASE, EMITTER, A COLLECTOR; MEANS CONNECTING SAID BASE TO A POINT INTERMEDIATE SAID SERIES CONNECTED IMPEDANCE ELEMENTS; MEANS CONNECTING SAID EMITTER TO ONE END OF SAID SERIES CONNECTED IMPEDANCE ELEMENTS; AND MEANS CONNECTING SAID COLLECTOR TO THE OTHER END OF SAID SERIES CONNECTED IMPEDANCE ELEMENTS, WHEREBY SAID TRANSISTOR CONTROLS THE CURRENT THROUGH SAID SECOND CIRCUIT PORTION IN RESPONSE TO THE IMMPEDANCE PRESENTED BY SAID IMPEDANCE ELEMENTS WHEN SAID UNIDIRECTIONAL CONDUCTIVE DEVICE IS PRESENTING A HIGH IMPEDANCE TO THE FLOW OF CURRENT.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |