Patent US4893232A successfully refreshed from Google Patents.
Patent US3189809A successfully refreshed from Google Patents.
US3189809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator-fed motor control with bistable field control of generator and motor
Assignee: Westinghouse Electric Corp
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Filing: 1961-09-28
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Granted: 1965-06-15
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Expires: 1981-09-28
Abstract
No abstract record available.
Inventors
- 👤 Keith H Sueker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:46
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/34; H02P7/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A MOTOR CONTROL CIRCUIT COMPRISING A MOTOR HAVING AN ARMATURE WINDING AND A FIELD WINDING, ARMATURE SUPPLY MEANS FOR ENERGIZING SAID ARMATURE WINDING, FIELD SUPPLY MEANS FOR ENERGIZING SAID FIELD WINDING, FIRST STATIC BISTABLE MEANS FOR CONTROLLING THE ARMATURE SUPPLY MEANS IN RESPONSE TO MOTOR SPEED AND ARMATURE SUPPLY MEANS SECOND STATIC BISTABLE MEANS FOR CONTROLLING THE FIELD SUPPLY MEANS IN RESPONSE TO MOTOR SPEED AND ARMATURE VOLTAGE.
Claim 2
Dependent Claim
68 words
A MOTOR CONTROL CIRCUIT COMPRISING A MOTOR HAVING AN ARMATURE WINDING AND A FIELD WINDING, ARMATURE SUPPLY MEANS FOR ENERGIZING SAID ARMATURE WINDING, FIELD SUPPLY MEANS FOR ENERGIZING SAID FIELD WINDING, FIRST STATIC BISTABLE MEANS FOR CONTROLLING THE ARMATURE SUPPLY MEANS IN RESPONSE TO MOTOR SPEED AND ARMATURE SUPPLY MEANS SECOND STATIC BISTABLE MEANS FOR CONTROLLING THE FIELD SUPPLY MEANS IN RESPONSE TO MOTOR SPEED AND ARMATURE VOLTAGE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |