US3114869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo motor speed control system
Assignee: Curtiss Wright Corp
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Filing: 1960-09-30
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Granted: 1963-12-17
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Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 Roscoe H Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:52
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A SPEED CONTROL SYSTEM FOR A D.C. POSITION SERVO COMBINATION HAVING A MOTOR, AN AMPLIFIER FOR THE MOTOR INPUT, MEANS FOR PRODUCING A D.C. VELOCITY FEEDBACK SIGNAL REPRESENTING THE SPEED OF SAID MOTOR AND MEANS FOR PRODUCING A POSITION SIGNAL OPPOSITE IN SENSE TO A MAIN INPUT CONTROL SIGNAL, COMPRISING A NETWORK CONNECTED TO THE AMPLIFIER INPUT AND ENERGIZED BY THE AFORESAID FEEDBACK, POSITION AND MAIN INPUT SIGNALS, MEANS FOR APPLYING AN ADDITIONAL CONTROL SIGNAL FOR ENERGIZING A PORTION OF SAID NETWORK, AND SIGNAL-SENSITIVE SWITCHING MEANS CONNECTED IN SAID NETWORK, SAID SWITCHING MEANS BEING CONTROLLED IN ACCORDANCE WITH THE RELATIVE MAGNITUDES OF SAID ADDITIONAL CONTROL SIGNAL AND SAID FEEDBACK SIGNAL FOR DETERMINING THE IMPEDANCE OF SAID NETWORK SO AS TO CAUSE THE MOTOR TO RUN IN JOINT RESPONSE TO SAID SIGNALS AT A REDUCED CONSTANT SPEED THAT IS MATERIALLY LESS THAN THE RATED MAXIMUM SPEED OF THE MOTOR THROUGHOUT ITS POSITIONING OPERATION.
Claim 2
Dependent Claim
152 words
A SPEED CONTROL SYSTEM FOR A D.C. POSITION SERVO COMBINATION HAVING A MOTOR, AN AMPLIFIER FOR THE MOTOR INPUT, MEANS FOR PRODUCING A D.C. VELOCITY FEEDBACK SIGNAL REPRESENTING THE SPEED OF SAID MOTOR AND MEANS FOR PRODUCING A POSITION SIGNAL OPPOSITE IN SENSE TO A MAIN INPUT CONTROL SIGNAL, COMPRISING A NETWORK CONNECTED TO THE AMPLIFIER INPUT AND ENERGIZED BY THE AFORESAID FEEDBACK, POSITION AND MAIN INPUT SIGNALS, MEANS FOR APPLYING AN ADDITIONAL CONTROL SIGNAL FOR ENERGIZING A PORTION OF SAID NETWORK, AND SIGNAL-SENSITIVE SWITCHING MEANS CONNECTED IN SAID NETWORK, SAID SWITCHING MEANS BEING CONTROLLED IN ACCORDANCE WITH THE RELATIVE MAGNITUDES OF SAID ADDITIONAL CONTROL SIGNAL AND SAID FEEDBACK SIGNAL FOR DETERMINING THE IMPEDANCE OF SAID NETWORK SO AS TO CAUSE THE MOTOR TO RUN IN JOINT RESPONSE TO SAID SIGNALS AT A REDUCED CONSTANT SPEED THAT IS MATERIALLY LESS THAN THE RATED MAXIMUM SPEED OF THE MOTOR THROUGHOUT ITS POSITIONING OPERATION.
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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |