US3093776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital servo loop with automatic tachometer control to provide variable damping
Assignee: General Precision Inc
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Filing: 1961-01-03
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Granted: 1963-06-11
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Richard M Bird
- 👤 Jr Roy Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
IN A DIGITAL SERVO LOOP HAVING A SERVO MOTOR AND TACHOMETER FEEDBACK WITH A SUMMING NETWORK AND SERVO AMPLIFIER RECEIVING ERROR AND FEEDBACK SIGNALS TO CONTROL THE SERVO MOTOR, THE IMPROVEMENT COMPRISING AN ELECTRONIC SWITCH RECEIVING SAID TACHOMETER FEEDBACK AND APPLYING A VARIABLE FEEDBACK SIGNAL TO SAID SUMMING NETWORK, AND AN AUTOMATIC TACHOMETER CONTROL CIRCUIT INCLUDING RECTIFYING AND INTEGRATING NETWORKS AND LEVEL DETECTOR FOR RECEIVING SAID ERROR SIGNALS AND APPLYING A CONTROL SIGNAL TO SAID ELECTRONIC SWITCH FOR VARYING THE AMOUNT OF TACHOMETER FEEDBACK IN ACCORDANCE WITH A TIME INTEGRAL OF SUCCESSIVE ERROR SIGNALS.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |