US3351845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excitation system for a dynamoelectric machine
Assignee: Westinghouse Electric Corp
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Filing: 1964-07-16
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Granted: 1967-11-07
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 James L Roof
- 👤 Larry L Hire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:13
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30; H02P9/302; H02P2101/00; H02P2101/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN EXCITATION CURRENT LIMITING SYSTEM FOR A DYNAMOELECTRIC MACHINE HAVING A FIELD WINDING WHOSE EXCITATION CURRENT FROM A SOURCE OF POTENTIAL IS CONTROLLED BY A SWITCHING TYPE REGULATOR, COMPRISING FIRST MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIELD WINDING, SAID REGULATOR AND SAID SOURCE OF POTENTIAL, PRODUCING A VOLTAGE DROP RESPONSIVE TO THE MAGNITUDE OF THE EXCITATION CURRENT FLOWING THROUGH SAID FIELD WINDING; SAID DYNAMOELECTRIC MACHINE INDUCING A RIPPLE COMPONENT INTO THE CURRENT FLOWING THROUGH SAID FIELD WINDING WHICH APPEARS IN THE VOLTAGE DROP ACROSS SAID FIRST MEANS; SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS RESPONSIVE TO THE VOLTAGE DROP ACROSS SAID FIRST MEANS; SAID SECOND MEANS BEING SWITCHABLE FROM A NON-CONDUCTIVE STATE TO A CONDUCTIVE STATE IN RESPONSE TO A SIGNAL OF PREDETER-
Claim 2
Dependent Claim
127 words
AN EXCITATION CURRENT LIMITING SYSTEM FOR A DYNAMOELECTRIC MACHINE HAVING A FIELD WINDING WHOSE EXCITATION CURRENT FROM A SOURCE OF POTENTIAL IS CONTROLLED BY A SWITCHING TYPE REGULATOR, COMPRISING FIRST MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIELD WINDING, SAID REGULATOR AND SAID SOURCE OF POTENTIAL, PRODUCING A VOLTAGE DROP RESPONSIVE TO THE MAGNITUDE OF THE EXCITATION CURRENT FLOWING THROUGH SAID FIELD WINDING; SAID DYNAMOELECTRIC MACHINE INDUCING A RIPPLE COMPONENT INTO THE CURRENT FLOWING THROUGH SAID FIELD WINDING WHICH APPEARS IN THE VOLTAGE DROP ACROSS SAID FIRST MEANS; SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS RESPONSIVE TO THE VOLTAGE DROP ACROSS SAID FIRST MEANS; SAID SECOND MEANS BEING SWITCHABLE FROM A NON-CONDUCTIVE STATE TO A CONDUCTIVE STATE IN RESPONSE TO A SIGNAL OF PREDETER-
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |