Patent US3221280A successfully refreshed from Google Patents.
US3221280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saturable reactor control
Assignee: McGraw Edison Co
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Filing: 1961-01-23
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Granted: 1965-11-30
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 James S Malsbary
- 👤 Hilker Annamary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:38
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/14; H01F29/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A THREE-PHASE SATURABLE CORE REACTOR FOR SUPPLYING POWER FROM A POWER INPUT CIRCUIT TO A LOAD CIRCUIT INCLUDING A MAIN MAGNETIC CORE AND A SINGLE-COIL MAIN WINDING ON THE CORE CONNECTED IN EACH PHASE OF THE SYSTEM, AND A SINGLE-COIL CONTROL WINDING LINKING ALL OF SAID CORES IN DIRECT INDUCTIVE RELATIONSHIP WITH EACH OF SAID MAIN WINDINGS AND ADAPTED TO BE ENERGIZED BY A SOURCE OF CONTROL CURRENT FOR CONTROLLING THE REACTANCE OF ALL OF SAID MAIN WINDINGS AND WHEREIN THE CONTROL WINDING IS SUBJECT TO INDUCED CURRENT FLOW THEREIN IN RESPONSE TO UNBALANCED LOAD CONDITIONS, THE IMPROVEMENT THEREIN COMPRISING AN ADDITIONAL MAGNETIC CORE PHYSICALLY LINKING IN DIRECT INDUCTIVE RELATIONSHIP ONLY SAID CONTROL WINDING TO THEREBY INCREASE THE REACTANCE OF SAID CONTROL WINDING AND LIMIT THE FLOW OF SAID INDUCED CURRENT THEREIN.
Claim 2
Dependent Claim
133 words
IN A THREE-PHASE SATURABLE CORE REACTOR FOR SUPPLYING POWER FROM A POWER INPUT CIRCUIT TO A LOAD CIRCUIT INCLUDING A MAIN MAGNETIC CORE AND A SINGLE-COIL MAIN WINDING ON THE CORE CONNECTED IN EACH PHASE OF THE SYSTEM, AND A SINGLE-COIL CONTROL WINDING LINKING ALL OF SAID CORES IN DIRECT INDUCTIVE RELATIONSHIP WITH EACH OF SAID MAIN WINDINGS AND ADAPTED TO BE ENERGIZED BY A SOURCE OF CONTROL CURRENT FOR CONTROLLING THE REACTANCE OF ALL OF SAID MAIN WINDINGS AND WHEREIN THE CONTROL WINDING IS SUBJECT TO INDUCED CURRENT FLOW THEREIN IN RESPONSE TO UNBALANCED LOAD CONDITIONS, THE IMPROVEMENT THEREIN COMPRISING AN ADDITIONAL MAGNETIC CORE PHYSICALLY LINKING IN DIRECT INDUCTIVE RELATIONSHIP ONLY SAID CONTROL WINDING TO THEREBY INCREASE THE REACTANCE OF SAID CONTROL WINDING AND LIMIT THE FLOW OF SAID INDUCED CURRENT THEREIN.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |