Patent US3239735A successfully refreshed from Google Patents.
US3239735A
Expired / Lapsed
US
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Data converting servo system
Assignee: International Business Machines Corp
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Filing: 1961-10-13
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Granted: 1966-03-08
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jerry W Raider
- 👤 George W Scott
- 👤 Robert A Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:36
CPC Classifications
H; H03; H03M; H03M1/00; G; G05; G05D; G05D3/00; G05D3/12; G05D3/20; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SERVO SYSTEM FOR POSITIONING A CONTROLLED MEMBER IN ACCORDANCE WITH AN INPUT SIGNAL COMPRISING, IN COMBINATION: A MOTOR HAVING AN ARMATURE WINDING; A CONTROLLED MEMBER DIRECTLY COUPLED WITH SAID MOTOR; MEANS PROVIDING AN INPUT SIGNAL REPRESENTING THE DESIRED POSITION OF SAID CONTROLLED MEMBER; MEANS PROVIDING A FEEDBACK SIGNAL REPRESENTING THE ACTUAL POSITION OF SAID CONTROLLED MEMBER; COMPARATOR MEANS FOR COMPARING SAID INPUT AND FEEDBACK SIGNALS; SAID COMPARATOR MEANS PROVIDING DIFFERENCE SIGNALS REPRESENTING THE DIRECTION SAID MOTOR IS TO BE ROTATED AND INDICATING A NULL CONDITION WHEN SAID INPUT AND FEEDBACK SIGNALS ARE THE SAME; MEANS CONTROLLING THE ENERGIZATION OF SAID ARMATURE WINDING OF SAID MOTOR IN RESPONSE OF SAID DIFFERENCE SIGNALS; SAID MOTOR BEING DE-ENERGIZED BY SAID MEANS CON-
Claim 2
Dependent Claim
120 words
A SERVO SYSTEM FOR POSITIONING A CONTROLLED MEMBER IN ACCORDANCE WITH AN INPUT SIGNAL COMPRISING, IN COMBINATION: A MOTOR HAVING AN ARMATURE WINDING; A CONTROLLED MEMBER DIRECTLY COUPLED WITH SAID MOTOR; MEANS PROVIDING AN INPUT SIGNAL REPRESENTING THE DESIRED POSITION OF SAID CONTROLLED MEMBER; MEANS PROVIDING A FEEDBACK SIGNAL REPRESENTING THE ACTUAL POSITION OF SAID CONTROLLED MEMBER; COMPARATOR MEANS FOR COMPARING SAID INPUT AND FEEDBACK SIGNALS; SAID COMPARATOR MEANS PROVIDING DIFFERENCE SIGNALS REPRESENTING THE DIRECTION SAID MOTOR IS TO BE ROTATED AND INDICATING A NULL CONDITION WHEN SAID INPUT AND FEEDBACK SIGNALS ARE THE SAME; MEANS CONTROLLING THE ENERGIZATION OF SAID ARMATURE WINDING OF SAID MOTOR IN RESPONSE OF SAID DIFFERENCE SIGNALS; SAID MOTOR BEING DE-ENERGIZED BY SAID MEANS CON-
References Cited (Backward Citations)
US1845481A
Cited
US2875392A
Cited
US2829323A
Cited
US2860293A
Cited
US2873418A
Cited
US2870437A
Cited
US2881375A
Cited
US2860294A
Cited
US2843811A
Cited
US2846630A
Cited
US3045157A
Cited
US2921247A
Cited
US2990506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |