Patent US747493A successfully refreshed from Google Patents.
US3241015A
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Positional servo system
Assignee: International Business Machines Corp
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Filing: 1961-12-26
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Granted: 1966-03-15
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Allen Francis Kempton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:57
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/20; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A SERVOMECHANICAL SYSTEM INCLUDING THE COMBINATION OF A MOTOR HAVING AN OUTPUT SHAFT, A FIRST MEANS COUPLED TO SAID SHAFT FOR PROVIDING A SIGNAL INDICATIVE OF THE POSITION OF SAID SHAFT, A SECOND MEANS FOR GENERATING A PLURALITY OF MUTUALLY EXCLUSIVE SIGNALS CORRESPONDING TO REFERENCE POSITIONS OF SAID SHAFT, MEANS OPERATIVE RESPONSIVE TO SIGNALS FROM SAID FIRST AND SECOND MEANS FOR PROVIDING A SIGNAL PROPORTIONAL TO THE SQUARE ROOT OF THE DIFFERENCE BETWEEN THE POSITION OF SAID SHAFT AND A PRESELECTED ONE OF SAID REFERENCE POSITIONS, VELOCITY SIGNAL MEANS COUPLED TO SAID SHAFT FOR PROVIDING A SIGNAL INDICATIVE OF THE VELOCITY OF SAID SHAFT, A SATURATING AMPLIFIER RESPONSIVE TO SAID VELOCITY SIGNAL AND SAID SQUARE ROOT SIGNAL FOR PROVIDING A CONTROL SIGNAL, AND MEANS COUPLING SAID MOTOR TO SAID AMPLIFIER.
Claim 2
Dependent Claim
130 words
A SERVOMECHANICAL SYSTEM INCLUDING THE COMBINATION OF A MOTOR HAVING AN OUTPUT SHAFT, A FIRST MEANS COUPLED TO SAID SHAFT FOR PROVIDING A SIGNAL INDICATIVE OF THE POSITION OF SAID SHAFT, A SECOND MEANS FOR GENERATING A PLURALITY OF MUTUALLY EXCLUSIVE SIGNALS CORRESPONDING TO REFERENCE POSITIONS OF SAID SHAFT, MEANS OPERATIVE RESPONSIVE TO SIGNALS FROM SAID FIRST AND SECOND MEANS FOR PROVIDING A SIGNAL PROPORTIONAL TO THE SQUARE ROOT OF THE DIFFERENCE BETWEEN THE POSITION OF SAID SHAFT AND A PRESELECTED ONE OF SAID REFERENCE POSITIONS, VELOCITY SIGNAL MEANS COUPLED TO SAID SHAFT FOR PROVIDING A SIGNAL INDICATIVE OF THE VELOCITY OF SAID SHAFT, A SATURATING AMPLIFIER RESPONSIVE TO SAID VELOCITY SIGNAL AND SAID SQUARE ROOT SIGNAL FOR PROVIDING A CONTROL SIGNAL, AND MEANS COUPLING SAID MOTOR TO SAID AMPLIFIER.
References Cited (Backward Citations)
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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) | 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 |