US3343052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo motor control
Assignee: Ampex Corp
•
Filing: 1964-09-18
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Granted: 1967-09-19
•
Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 Jerry R Youngstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:45
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58; H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/916; Y10S388/917; Y10S388/923; Y10S388/93
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A SERVO SYSTEM COMPRISING A MOTOR FOR DRIVING A MEMBER, THE MOTOR HAVING A SELECTED TIME CONSTANT OF ENERGIZATION AND A PAIR OF WINDINGS FOR ENERGIZATION IN OPPOSITE DIRECTIONS; MEANS FOR SENSING AT LEAST THE VELOCITY OF THE DRIVEN MEMBER TO DETERMINED THE STATUS OF THE DRIVEN MEMBER; SERVO AMPLIFIER MEANS HAVING AN ELECTRICAL INPUT SIGNAL RESPONSIVE TO THE SENSING MEANS AND PROVIDING AN ELECTRICAL ANALOG ERROR SIGNAL THE POLARITY AND MAGNITUDE OF WHICH IS REPRESENTATIVE OF A DESIRED CHANGE IN THE STATE OF THE DRIVEN MEMBER; A PAIR OF AMPLITUDE SENSITIVE CIRCUIT MEANS EACH RESPONSIVE TO A DIFFERENT POLARITY VARIATION OF THE ERROR SIGNAL AND EACH PROVIDING A CONTROL SIGNAL INDICATION WHEN THE ERROR SIGNAL EXCURSION IS IN EXCESS OF A PREDETERMINED THRESHOLD AMPLITUDE AND OF
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |