Patent US3877019A successfully refreshed from Google Patents.
Patent US3091731A successfully refreshed from Google Patents.
US3091731A
Expired / Lapsed
US
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Power factor correction apparatus for alternating current power distribution systems
Assignee: Sigma Instruments Inc
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Filing: 1961-05-24
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Granted: 1963-05-28
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Expires: 1981-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Laurence B Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:59
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1821; Y; Y02; Y02E; Y02E40/00; Y02E40/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
POWER FACTOR CORRECTION APPARATUS FOR AN ALTERNATING CURRENT POWER SUPPLY LINE, COMPRISING A SATURABLE REACTOR HAVING A PLURALITY OF CURRENT WINDINGS EACH HAVING A MAGNET CORE, AND CONTROL WINDING WOUND AROUND ALL SAID CORES, MEANS FOR DERIVING A CENTER-TAPPED VOLTAGE PROPORTIONAL TO THE LINE VOLTAGE AND HAVING A FIXED PHASE RELATION THERETO, A RECTIFIER CONNECTED IN SERIES WITH EACH CURRENT WINDING, THE RECTIFIERS BEING CONNECTED TO THE CENTER-TAPPED REFERENCE VOLTAGE, SAID RECTIFIERS BEING CONNECTED TO SAID CURRENT WINDINGS WITH POLARITIES SUCH AS TO PROVIDE PUSH-PULL FULL-WAVE CURRENT FLOW THROUGH SAID CURRENT WINDINGS, COUPLING MEANS POSITIONED CLOSE TO ONE CONDUCTOR OF SAID LINE BUT ELECTRICALLY SEPARATE FROM SAID LINE FOR DERIVING A SECOND VOLTAGE RELATED IN PHASE AND MAGNITUDE TO THE CURRENT IN SAID LINE AND FOR APPLYING SAID SECOND VOLTAGE TO SAID CONTROL WINDING, A PHASE CORRECTING CAPACITOR, RELAY MEANS CONNECTED TO ALL SAID CURRENT WINDINGS AND RESPONSIVE THERETO FOR CONNECTING AND DISCONNECTING SAID CAPACITOR ACROSS SAID LINE RESPONSE TO FIRST AND SECOND PREDETERMINED VOLTAGE-TOCURRENT RELATIONSHIPS IN SAID POWER LINE.
Claim 2
Dependent Claim
170 words
POWER FACTOR CORRECTION APPARATUS FOR AN ALTERNATING CURRENT POWER SUPPLY LINE, COMPRISING A SATURABLE REACTOR HAVING A PLURALITY OF CURRENT WINDINGS EACH HAVING A MAGNET CORE, AND CONTROL WINDING WOUND AROUND ALL SAID CORES, MEANS FOR DERIVING A CENTER-TAPPED VOLTAGE PROPORTIONAL TO THE LINE VOLTAGE AND HAVING A FIXED PHASE RELATION THERETO, A RECTIFIER CONNECTED IN SERIES WITH EACH CURRENT WINDING, THE RECTIFIERS BEING CONNECTED TO THE CENTER-TAPPED REFERENCE VOLTAGE, SAID RECTIFIERS BEING CONNECTED TO SAID CURRENT WINDINGS WITH POLARITIES SUCH AS TO PROVIDE PUSH-PULL FULL-WAVE CURRENT FLOW THROUGH SAID CURRENT WINDINGS, COUPLING MEANS POSITIONED CLOSE TO ONE CONDUCTOR OF SAID LINE BUT ELECTRICALLY SEPARATE FROM SAID LINE FOR DERIVING A SECOND VOLTAGE RELATED IN PHASE AND MAGNITUDE TO THE CURRENT IN SAID LINE AND FOR APPLYING SAID SECOND VOLTAGE TO SAID CONTROL WINDING, A PHASE CORRECTING CAPACITOR, RELAY MEANS CONNECTED TO ALL SAID CURRENT WINDINGS AND RESPONSIVE THERETO FOR CONNECTING AND DISCONNECTING SAID CAPACITOR ACROSS SAID LINE RESPONSE TO FIRST AND SECOND PREDETERMINED VOLTAGE-TOCURRENT RELATIONSHIPS IN SAID POWER LINE.
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |