Patent US3351791A successfully refreshed from Google Patents.
US3351791A
Expired / Lapsed
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Controlled velocity drive
Assignee: Eaton Corp
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Filing: 1963-09-19
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Granted: 1967-11-07
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Aubrey H Smith
- 👤 Lester T Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; H02P29/0027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A CONTROLLED-VELOCITY DRIVE HAVING A DRIVEN MEMBER, AND A WINDING THE ENERGIZATION OF WHICH CONTROLS THE SPEED OF SAID DRIVEN MEMBER, A SOURCE OF ELECTRICAL POWERAND A SOLID-STATE SWITCHING DEVICE INTERCONNECTED BETWEEN SAID SOURCE AND SAID WINDING AND ADAPTED SELECTIVELY TO CONTROL THE ENERGIZATION OF SAID WINDING THEREBY TO REGULATE THE ANGULAR VELOCITY OF SAID DRIVEN MEMBER; A CONTROL FOR SAID SWITCHING DEVICE COMPRISING MEANS FOR PRODUCING A REFERENCE VOLTAGE PROPORTIONAL TO A PRESELECTED ANGULAR VELOCITY OF SAID DRIVEN MEMBER, A FIRST FEEDBACK CIRCUIT SENSING THE ANGULAR VELOCITY OF SAID DRIVEN MEMBER AND PRODUCING A VELOCITY FEEDBACK SIGNAL WHICH VARIES AS A FUNCTION THEREOF, A SECOND FEEDBACK CIRCUIT INCLUDING A RESISTOR IN SERIES WITH SAID WINDING FOR PROVIDING A CURRENT
Claim 2
Dependent Claim
121 words
IN A CONTROLLED-VELOCITY DRIVE HAVING A DRIVEN MEMBER, AND A WINDING THE ENERGIZATION OF WHICH CONTROLS THE SPEED OF SAID DRIVEN MEMBER, A SOURCE OF ELECTRICAL POWERAND A SOLID-STATE SWITCHING DEVICE INTERCONNECTED BETWEEN SAID SOURCE AND SAID WINDING AND ADAPTED SELECTIVELY TO CONTROL THE ENERGIZATION OF SAID WINDING THEREBY TO REGULATE THE ANGULAR VELOCITY OF SAID DRIVEN MEMBER; A CONTROL FOR SAID SWITCHING DEVICE COMPRISING MEANS FOR PRODUCING A REFERENCE VOLTAGE PROPORTIONAL TO A PRESELECTED ANGULAR VELOCITY OF SAID DRIVEN MEMBER, A FIRST FEEDBACK CIRCUIT SENSING THE ANGULAR VELOCITY OF SAID DRIVEN MEMBER AND PRODUCING A VELOCITY FEEDBACK SIGNAL WHICH VARIES AS A FUNCTION THEREOF, A SECOND FEEDBACK CIRCUIT INCLUDING A RESISTOR IN SERIES WITH SAID WINDING FOR PROVIDING A CURRENT
References Cited (Backward Citations)
US3293465A
Cited
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 |