Patent US3217239A successfully refreshed from Google Patents.
US3217239A
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Voltage control apparatus
Assignee: AT&T Inc
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Filing: 1961-12-29
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Granted: 1965-11-09
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Lunney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:06
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F1/16; G05F1/20; G05F1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A VOLTAGE CONTROL SYSTEM, A TRANSFORMER INTERPOSED BETWEEN A SOURCE OF ALTERNATIG-CURRENT ENERGY AND A LOAD, SAID TRANSFORMER HAVING A PLURALITY OF TAPS THEREON, SWITCHING MEANS FOR REPEATEDLY ALTERING THE TURNS-RATIO OF SAID TRANSFORMER BY TRANSFERRING CIRCUIT CONNECTIONS FROM ONE TAP TO ANOTHER AT SELECTED SWITCHING TIMES IN EACH CYCLE OF SAID ALTERNATING-CURRENT ENERGY, AND CONTROL MEANS FOR VARYING THE RELATIVE TIME POSITION OF SAID SWITCHING TIMES WITHIN EACH CYCLE WHEREBY THE AVERAGE VOLTAGE DELIVERED TO SAID LOAD MAY BE ADJUSTED.
Claim 2
Dependent Claim
82 words
IN A VOLTAGE CONTROL SYSTEM, A TRANSFORMER INTERPOSED BETWEEN A SOURCE OF ALTERNATIG-CURRENT ENERGY AND A LOAD, SAID TRANSFORMER HAVING A PLURALITY OF TAPS THEREON, SWITCHING MEANS FOR REPEATEDLY ALTERING THE TURNS-RATIO OF SAID TRANSFORMER BY TRANSFERRING CIRCUIT CONNECTIONS FROM ONE TAP TO ANOTHER AT SELECTED SWITCHING TIMES IN EACH CYCLE OF SAID ALTERNATING-CURRENT ENERGY, AND CONTROL MEANS FOR VARYING THE RELATIVE TIME POSITION OF SAID SWITCHING TIMES WITHIN EACH CYCLE WHEREBY THE AVERAGE VOLTAGE DELIVERED TO SAID LOAD MAY BE ADJUSTED.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |