US3254283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous rotation servo
Assignee: General Precision Inc
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Filing: 1963-05-15
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Granted: 1966-05-31
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Expires: 1983-05-15
Abstract
No abstract record available.
Inventors
- 👤 John M Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:19
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/16; G09B9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A SERVOMECHANISM OPERABLE CONTINUOUSLY THROUGH PLURAL REVOLUTIONS TO PROVIDE AN OUTPUT SHAFT POSITION COMMENSURATE WITH THE VALUE OF A QUANTITY, COMPRISING, IN COMBINATION: MEANS FOR DERIVING FIRST AND SECOND COMMAND SIGNALS WHICH VARY IN ACCORDANCE WITH FIRST AND SECOND PERIODIC FUNCTIONS OF SAID QUANTITY, SAID PERIODIC FUNCTIONS BEING SELECTED SO AS NOT BOTH TO BE DISCONTINUOUS AT ANY VALUE OF SAID QUANTITY; FIRST SUMMING MEANS FOR COMBINING SAID FIRST COMMAND SIGNAL AND A FIRST FEEDBACK SIGNAL TO DERIVE A FIRST ERROR SIGNAL; SECOND SUMMING MEANS FOR COMBINING SAID SECOND COMMAND SIGNAL AND A SECOND FEEDBACK SIGNAL TO DERIVE A SECOND ERROR SIGNAL; A FIRST POSITION-TO-ELECTRICAL SIGNAL TRANSDUCER OPERABLE OVER A FIRST ZONE OF THE ROTATION OF SAID OUTPUT SHAFT TO DERIVE SAID FIRST FEEDBACK VOLTAGE AND INOPERABLE OVER A SECOND ZONE OF THE ROTATION OF SAID OUTPUT SHAFT; A SECOND POSITION-TO-ELECTRICAL SIGNAL TRANSDUCER OPERABLE OVER A THIRD ZONE OF THE ROTATION OF SAID OUTPUT SHAFT TO DERIVE SAID SECOND FEEDBACK VOLTAGE AND INOPERABLE OVER A FOURTH ZONE OF THE ROTATION OF SAID OUTPUT SHAFT; AN AMPLIFIER CONNECTED TO AMPLIFY A WEIGHTED ERROR SIGNAL; A MOTOR CONNECTED TO BE DRIVEN BY SAID AMPLIFIER, SAID MOTOR BE-
Claim 2
Dependent Claim
195 words
A SERVOMECHANISM OPERABLE CONTINUOUSLY THROUGH PLURAL REVOLUTIONS TO PROVIDE AN OUTPUT SHAFT POSITION COMMENSURATE WITH THE VALUE OF A QUANTITY, COMPRISING, IN COMBINATION: MEANS FOR DERIVING FIRST AND SECOND COMMAND SIGNALS WHICH VARY IN ACCORDANCE WITH FIRST AND SECOND PERIODIC FUNCTIONS OF SAID QUANTITY, SAID PERIODIC FUNCTIONS BEING SELECTED SO AS NOT BOTH TO BE DISCONTINUOUS AT ANY VALUE OF SAID QUANTITY; FIRST SUMMING MEANS FOR COMBINING SAID FIRST COMMAND SIGNAL AND A FIRST FEEDBACK SIGNAL TO DERIVE A FIRST ERROR SIGNAL; SECOND SUMMING MEANS FOR COMBINING SAID SECOND COMMAND SIGNAL AND A SECOND FEEDBACK SIGNAL TO DERIVE A SECOND ERROR SIGNAL; A FIRST POSITION-TO-ELECTRICAL SIGNAL TRANSDUCER OPERABLE OVER A FIRST ZONE OF THE ROTATION OF SAID OUTPUT SHAFT TO DERIVE SAID FIRST FEEDBACK VOLTAGE AND INOPERABLE OVER A SECOND ZONE OF THE ROTATION OF SAID OUTPUT SHAFT; A SECOND POSITION-TO-ELECTRICAL SIGNAL TRANSDUCER OPERABLE OVER A THIRD ZONE OF THE ROTATION OF SAID OUTPUT SHAFT TO DERIVE SAID SECOND FEEDBACK VOLTAGE AND INOPERABLE OVER A FOURTH ZONE OF THE ROTATION OF SAID OUTPUT SHAFT; AN AMPLIFIER CONNECTED TO AMPLIFY A WEIGHTED ERROR SIGNAL; A MOTOR CONNECTED TO BE DRIVEN BY SAID AMPLIFIER, SAID MOTOR BE-
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |