Patent US3309588A successfully refreshed from Google Patents.
US3309588A
Expired / Lapsed
US
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Multiplex servo system for servo motors mechanically connected in series
Assignee: Ferranti International PLC
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Filing: 1963-12-05
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Granted: 1967-03-14
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Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Martin Derek John
- 👤 Curties Maurice Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:32
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A MULTIPLEX SERVO SYSTEM INCLUDING A PLURALITY OF SERVO MOTORS MECHANICALLY CONNECTED IN SERIES FOR DRIVING AN OUTPUT MEMBER, AN INDIVIDUAL SUB-CHANNEL CONNECTED TO EACH SERVO MOTOR FOR CONTROLLING THE ASSOCIATED SERVO MOTOR, EACH INDIVIDUAL SUB-CHANNEL HAVING AT LEAST ONE AMPLIFIER, A PLURALITY OF PICK-OFF DEVICES FOR DETECTING MOVEMENTS OF THE OUTPUT MEMBER AND EACH SUB-CHANNEL INCLUDING A NEGATIVE FEEDBACK PATH CONNECTED FROM THE ASSOCIATED SERVO MOTOR FOR APPLYING TO SAID SUB-CHANNEL A FEEDBACK SIGNAL PROPORTIONAL TO THE OUTPUT DISPLACEMENT OF THE ASSOCIATED SERVO MOTOR AND A NEGATIVE FEEDBACK PATH CONNECTED FROM AN INDIVIDUAL PICK-OFF DEVICE RESPONSIVE TO TOTAL MOVEMENT OF SAID OUTPUT MEMBER FOR APPLYING TO SAID SUB-CHANNEL A FEEDBACK SIGNAL PROPORTIONAL TO THE TOTAL MOVEMENT OF THE OUTPUT MEMBER.
Claim 2
Dependent Claim
121 words
A MULTIPLEX SERVO SYSTEM INCLUDING A PLURALITY OF SERVO MOTORS MECHANICALLY CONNECTED IN SERIES FOR DRIVING AN OUTPUT MEMBER, AN INDIVIDUAL SUB-CHANNEL CONNECTED TO EACH SERVO MOTOR FOR CONTROLLING THE ASSOCIATED SERVO MOTOR, EACH INDIVIDUAL SUB-CHANNEL HAVING AT LEAST ONE AMPLIFIER, A PLURALITY OF PICK-OFF DEVICES FOR DETECTING MOVEMENTS OF THE OUTPUT MEMBER AND EACH SUB-CHANNEL INCLUDING A NEGATIVE FEEDBACK PATH CONNECTED FROM THE ASSOCIATED SERVO MOTOR FOR APPLYING TO SAID SUB-CHANNEL A FEEDBACK SIGNAL PROPORTIONAL TO THE OUTPUT DISPLACEMENT OF THE ASSOCIATED SERVO MOTOR AND A NEGATIVE FEEDBACK PATH CONNECTED FROM AN INDIVIDUAL PICK-OFF DEVICE RESPONSIVE TO TOTAL MOVEMENT OF SAID OUTPUT MEMBER FOR APPLYING TO SAID SUB-CHANNEL A FEEDBACK SIGNAL PROPORTIONAL TO THE TOTAL MOVEMENT OF THE OUTPUT MEMBER.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |