US3305768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.-c. voltage calibrating apparatus
Assignee: Weston Instruments Inc
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Filing: 1963-02-14
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Granted: 1967-02-21
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Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Koep
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
AN A.-C. VOLTAGE CALIBRATOR COMPRISING A VARIABLE SOURCE OF A.-C. CURRENT; AT LEAST ONE TRANSFORMER INDUCTIVELY COUPLED TO RECEIVE CURRENT FROM SAID SOURCE AND THEREBY GENERATING AN EXCITATION VOLTAGE WHICH VARIES IN AMPLITUDE PROPORTIONALLY TO VARIATIONS IN AMPLITUDE OF THE A.-C. CURRENT FROM SAID SOURCE, SAID TRANSFORMER INCLUDING AT LEAST ONE GROUP OF PLURAL DISCRETE WINDINGS HAVING END TERMINALS SERIES-CONNECTED AT LEAST ONE OF SAID WINDINGS BEING A REFERENCE WINDING AND PRODUCING THEREACROSS A REFERENCE VOLTAGE, EACH DISCRETE WINDING HAVING THE SAME RATIO OF IMPEDANCE TO INDUCED VOLTAGE AS EVERY OTHER DISCRETE WINDING SO THAT ANY VOLTAGE DROP ACROSS THE END TERMINALS OF EACH WINDING IS A CONSTANT PERCENTILE OF THE AMPLITUDE OF THE EXCITATION VOLTAGE THAT IS INDUCED IN EACH WINDING, A DEVICE UNDER VOLTAGE CALIBRATION CONNECTED TO TWO SELECTED END TERMINALS INCLUDING THEREBETWEEN AT LEAST SAID REFERENCE WINDING, A STANDARDIZATION CIRCUIT CONNECTED TO RECEIVE AS AN INPUT THE REFERENCE VOLTAGE FROM SAID REFERENCE WINDING AND INCLUDING A
Claim 2
Dependent Claim
159 words
AN A.-C. VOLTAGE CALIBRATOR COMPRISING A VARIABLE SOURCE OF A.-C. CURRENT; AT LEAST ONE TRANSFORMER INDUCTIVELY COUPLED TO RECEIVE CURRENT FROM SAID SOURCE AND THEREBY GENERATING AN EXCITATION VOLTAGE WHICH VARIES IN AMPLITUDE PROPORTIONALLY TO VARIATIONS IN AMPLITUDE OF THE A.-C. CURRENT FROM SAID SOURCE, SAID TRANSFORMER INCLUDING AT LEAST ONE GROUP OF PLURAL DISCRETE WINDINGS HAVING END TERMINALS SERIES-CONNECTED AT LEAST ONE OF SAID WINDINGS BEING A REFERENCE WINDING AND PRODUCING THEREACROSS A REFERENCE VOLTAGE, EACH DISCRETE WINDING HAVING THE SAME RATIO OF IMPEDANCE TO INDUCED VOLTAGE AS EVERY OTHER DISCRETE WINDING SO THAT ANY VOLTAGE DROP ACROSS THE END TERMINALS OF EACH WINDING IS A CONSTANT PERCENTILE OF THE AMPLITUDE OF THE EXCITATION VOLTAGE THAT IS INDUCED IN EACH WINDING, A DEVICE UNDER VOLTAGE CALIBRATION CONNECTED TO TWO SELECTED END TERMINALS INCLUDING THEREBETWEEN AT LEAST SAID REFERENCE WINDING, A STANDARDIZATION CIRCUIT CONNECTED TO RECEIVE AS AN INPUT THE REFERENCE VOLTAGE FROM SAID REFERENCE WINDING AND INCLUDING A
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US3113261A
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |