Patent US3241002A successfully refreshed from Google Patents.
US3241002A
Expired / Lapsed
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Control for electromagnetic coupling apparatus
Assignee: Eaton Corp
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Filing: 1962-11-05
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Granted: 1966-03-15
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Aubrey H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A CONTROL FOR ENERGIZING A FIELD COIL ASSOCIATED WITH ELECTROMAGNETIC COUPLING APPARATUS COMPRISING: A SOURCE OF ELECTRICAL POWER, AN ELECTRONIC TRANSDUCER HAVING A CONTROL ELECTRODE ADAPTED TO CONTROL THE CONDUCTIVITY OF SAID TRANSDUCER, A FIRST ELECTRICAL CIRCUIT INTERCONNECTING SAID POWER SOURCE WITH SAID TRANSDUCER AND SAID FIELD COIL, THE AVERAGE LEVEL OF CONDUCTIVITY OF SAID TRANSDUCER ESTABLISHING THE DEGREE OF ENERGIZATION OF SAID FIELD COIL, CONTROL MEANS HAVING AN INPUT AND ADAPTED TO SUPPLY AN OUTPUT SIGNAL TO SAID CONTROL ELECTRODE TO CHANGE THE CONDUCTIVITY OF SAID TRANSDUCER FROM A FIRST STATE OF HIGH CONDUCTIVITY TO A SECOND STATE WHEREIN THE AVERAGE CONDUCTIVITY OF SAID TRANSDUCER IS REDUCED TO A PREDETERMINED LEVEL, MEANS FOR SENSING THE CURRENT FLOW THROUGH SAID FIELD COIL AND DEVELOPING AN ELECTRICAL SIGNAL HAVING A MAGNITUDE WHICH IS A TIME-DELAYED FUNCTION OF THE LEVEL OF SAID CURRENT FLOW, AND A SECOND ELECTRICAL CIRCUIT INTERCONNECTING SAID SENSING AND DELAY MEANS WITH SAID INPUT WHEREBY THE CONDUCTIVITY OF SAID TRANSDUCER IS CHANGED FROM SAID FIRST TO SAID SECOND STATE AT A DELAYED INTERVAL AFTER INITIAL ENERGIZATION OF SAID FIELD COIL AND THE INITIAL DEGREE OF ENERGIZATION OF THE FIELD COIL IS THEREUPON ACCORDINGLY REDUCED.
Claim 2
Dependent Claim
196 words
A CONTROL FOR ENERGIZING A FIELD COIL ASSOCIATED WITH ELECTROMAGNETIC COUPLING APPARATUS COMPRISING: A SOURCE OF ELECTRICAL POWER, AN ELECTRONIC TRANSDUCER HAVING A CONTROL ELECTRODE ADAPTED TO CONTROL THE CONDUCTIVITY OF SAID TRANSDUCER, A FIRST ELECTRICAL CIRCUIT INTERCONNECTING SAID POWER SOURCE WITH SAID TRANSDUCER AND SAID FIELD COIL, THE AVERAGE LEVEL OF CONDUCTIVITY OF SAID TRANSDUCER ESTABLISHING THE DEGREE OF ENERGIZATION OF SAID FIELD COIL, CONTROL MEANS HAVING AN INPUT AND ADAPTED TO SUPPLY AN OUTPUT SIGNAL TO SAID CONTROL ELECTRODE TO CHANGE THE CONDUCTIVITY OF SAID TRANSDUCER FROM A FIRST STATE OF HIGH CONDUCTIVITY TO A SECOND STATE WHEREIN THE AVERAGE CONDUCTIVITY OF SAID TRANSDUCER IS REDUCED TO A PREDETERMINED LEVEL, MEANS FOR SENSING THE CURRENT FLOW THROUGH SAID FIELD COIL AND DEVELOPING AN ELECTRICAL SIGNAL HAVING A MAGNITUDE WHICH IS A TIME-DELAYED FUNCTION OF THE LEVEL OF SAID CURRENT FLOW, AND A SECOND ELECTRICAL CIRCUIT INTERCONNECTING SAID SENSING AND DELAY MEANS WITH SAID INPUT WHEREBY THE CONDUCTIVITY OF SAID TRANSDUCER IS CHANGED FROM SAID FIRST TO SAID SECOND STATE AT A DELAYED INTERVAL AFTER INITIAL ENERGIZATION OF SAID FIELD COIL AND THE INITIAL DEGREE OF ENERGIZATION OF THE FIELD COIL IS THEREUPON ACCORDINGLY REDUCED.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |