US3227935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo system
Assignee: Tokyo Keiki Inc
•
Filing: 1963-01-16
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Granted: 1966-01-04
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Expires: 1983-01-16
Abstract
No abstract record available.
Inventors
- 👤 Kawada Shin-Ichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A NON-LINEAR SERVO COMPRISING: (A) A SERVO MOTOR; (B) RELAY TYPE CONTROLLING MEANS FOR CONTROLLING SAID SERVO MOTOR; (C) TRANSDUCER MEANS COUPLED TO THE OUTPUT OF SAID SERVO MOTOR FOR PRODUCING A FEEDBACK ELECTRIC SIGNAL WHICH IS PROPORTIONAL TO THE OUTPUT OF SAID NONLINEAR SERVO SYSTEM; (D) ELECTIRC CIRCUIT MEANS COUPLED TO SAID RELAY TYPE CONTROLLING MEANS TO COUPLED AN INCOMING SIGNAL TO SAID CONTROLLING MEANS, SAID CIRCUIT MEANS INCLUDING A SUMMING POINT; (E) A FEEDBACK CIRCUIT INTERCONNECTING SAID TRANSDUCER MEANS TO SAID ELECTRIC CIRCUIT MEANS, TO COUPLE SAID FEEDBACK ELECTRIC SIGNAL TO SAID SUMMING POINT; AND (F) A FEEDBACK ELEMENT IN SAID FEEDBACK CIRCUIT FOR AFFORDING PROPROTIONAL AND DERIVATIVE OPERATIONS TO SAID NON-LINEAR SERVO SYSTEM, SAID FEEDBACK ELEMENT INCLUDING A NON-LINEAR ELEMENT WHICH CAUSES A DESIRABLE VARIATION OF THE DERIVATIVE OPERATION IN ACCORDANCE WITH THE VALUE OF THE OUTPUT SIGNAL OF SAID TRANSDUCER.
Claim 2
Dependent Claim
144 words
A NON-LINEAR SERVO COMPRISING: (A) A SERVO MOTOR; (B) RELAY TYPE CONTROLLING MEANS FOR CONTROLLING SAID SERVO MOTOR; (C) TRANSDUCER MEANS COUPLED TO THE OUTPUT OF SAID SERVO MOTOR FOR PRODUCING A FEEDBACK ELECTRIC SIGNAL WHICH IS PROPORTIONAL TO THE OUTPUT OF SAID NONLINEAR SERVO SYSTEM; (D) ELECTIRC CIRCUIT MEANS COUPLED TO SAID RELAY TYPE CONTROLLING MEANS TO COUPLED AN INCOMING SIGNAL TO SAID CONTROLLING MEANS, SAID CIRCUIT MEANS INCLUDING A SUMMING POINT; (E) A FEEDBACK CIRCUIT INTERCONNECTING SAID TRANSDUCER MEANS TO SAID ELECTRIC CIRCUIT MEANS, TO COUPLE SAID FEEDBACK ELECTRIC SIGNAL TO SAID SUMMING POINT; AND (F) A FEEDBACK ELEMENT IN SAID FEEDBACK CIRCUIT FOR AFFORDING PROPROTIONAL AND DERIVATIVE OPERATIONS TO SAID NON-LINEAR SERVO SYSTEM, SAID FEEDBACK ELEMENT INCLUDING A NON-LINEAR ELEMENT WHICH CAUSES A DESIRABLE VARIATION OF THE DERIVATIVE OPERATION IN ACCORDANCE WITH THE VALUE OF THE OUTPUT SIGNAL OF SAID TRANSDUCER.
References Cited (Backward Citations)
US2448564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |