US3093783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic circuits for comparing an a. c. voltage to a d. c. voltage
Assignee: Marsland Engineering Ltd
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Filing: 1960-07-07
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Granted: 1963-06-11
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Expires: 1980-07-07
Abstract
No abstract record available.
Inventors
- 👤 Hass Zygmunt Konstanty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:10
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
AN ELECTRIC CIRCUIT FOR COMPARING AN A.C. VOLTAGE TO A D.C. VOLTAGE, COMPRISING A FIRST CLOSED LOOP, HAVING IN SERIES AN A.C. VOLTAGE SOURCE, A FIRST D.C. VOLTAGE SOURCE, A PASSIVE CIRCUIT ELEMENT, A COMPARISON SEMICONDUCTOR DIODE DISPOSED IN THE LOOP SO AS TO OPPOSE FLOW OF D.C. CURRENT FROM THE FIRST D.C. SOURCE IN THE ABSENCE OF ANY A.C. VOLTAGE, AND A FIRST END TERMINAL AND THE TAP OF A POTENTIOMETER; A SECOND CLOSED LOOP HAVING IN SERIES A COMPENSATING DIODE HAVING A NEGATIVE TEMPERATURE CHARACTERISTIC, A RESISTOR, AND A SECOND D.C. VOLTAGE SOURCE; THE END TERMINALS OF THE COMPENSATING DIODE BEING CONNECTED TO THE END TERMINALS OF THE POTENTIOMETER, THE COMPENSATING DIODE AND THE SECOND D.C. VOLTAGE SOURCE BEING DISPOSED SO THAT THE COMPENSATING DIODE DOES NOT OPPOSE D.C. CURRENT FLOW THROUGH THE SECOND CLOSED LOOP, AND THE COMPENSATING DIODE BEING DISPOSED SO THAT IT DOES NOT OPPOSE D.C. CURRENT FLOW THROUGH ITSELF DUE TO THE FIRST D.C. VOLTAGE SOURCE.
Claim 2
Dependent Claim
162 words
AN ELECTRIC CIRCUIT FOR COMPARING AN A.C. VOLTAGE TO A D.C. VOLTAGE, COMPRISING A FIRST CLOSED LOOP, HAVING IN SERIES AN A.C. VOLTAGE SOURCE, A FIRST D.C. VOLTAGE SOURCE, A PASSIVE CIRCUIT ELEMENT, A COMPARISON SEMICONDUCTOR DIODE DISPOSED IN THE LOOP SO AS TO OPPOSE FLOW OF D.C. CURRENT FROM THE FIRST D.C. SOURCE IN THE ABSENCE OF ANY A.C. VOLTAGE, AND A FIRST END TERMINAL AND THE TAP OF A POTENTIOMETER; A SECOND CLOSED LOOP HAVING IN SERIES A COMPENSATING DIODE HAVING A NEGATIVE TEMPERATURE CHARACTERISTIC, A RESISTOR, AND A SECOND D.C. VOLTAGE SOURCE; THE END TERMINALS OF THE COMPENSATING DIODE BEING CONNECTED TO THE END TERMINALS OF THE POTENTIOMETER, THE COMPENSATING DIODE AND THE SECOND D.C. VOLTAGE SOURCE BEING DISPOSED SO THAT THE COMPENSATING DIODE DOES NOT OPPOSE D.C. CURRENT FLOW THROUGH THE SECOND CLOSED LOOP, AND THE COMPENSATING DIODE BEING DISPOSED SO THAT IT DOES NOT OPPOSE D.C. CURRENT FLOW THROUGH ITSELF DUE TO THE FIRST D.C. VOLTAGE SOURCE.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |