US3219936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control circuit utilizing input and internal signals controlling reset for providing improved step response
Assignee: Schneider Electric Buildings Americas Inc
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Filing: 1961-05-26
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Granted: 1965-11-23
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Dennis G Eksten
- 👤 Gunnar F Ohlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN AN AUTOMATIC CONTROL SYSTEM FOR ADJUSTING AND MAINTAINING A CONTROLLED CONDITION IN AGREEMENT WITH A SELECTABLE SET POINT VALUE, THE COMBINATION COMPRISING MEANS FOR GENERATING AN INPUT ERROR SIGNAL REPRESENTATIVE OF THE ERROR BETWEEN THE CONTROLLED CONDITION AND THE SET POINT VALUE, RESET MEANS FOR PRODUCING A RESET SIGNAL WHICH VARIES SUBSTANTIALLY AS A TIME INTEGRAL FUNCTION OF SUCH ERROR, AMPLIFYING MEANS COUPLED TO RECEIVE SAID INPUT ERROR SIGNAL AND SAID RESET SIGNAL FOR CREATING AN OUTPUT SIGNAL REPRESENTING THE ALGEBRAIC SUM THEREOF, MEANS COUPLED TO RECEIVE SAID OUTPUT SIGNAL AND RESPONSIVE THERETO FOR CORRECTIVELY RESTORING THE CONTROLLED CONDITION TO THE SET POINT VALUE WITH PROPORTIONAL AND RESET ACTION, SAID AMPLIFYING MEANS INCLUDING MEANS FOR GENERATING AN INTERNAL ERROR SIGNAL REPRESENTATIVE OF THE SAID ALGEBRAIC SUM, AND MEANS COUPLED TO RECEIVE AT LEAST SAID INTERNAL ERROR SIGNAL AND RESPONSIVE THERETO FOR IN-
Claim 2
Dependent Claim
143 words
IN AN AUTOMATIC CONTROL SYSTEM FOR ADJUSTING AND MAINTAINING A CONTROLLED CONDITION IN AGREEMENT WITH A SELECTABLE SET POINT VALUE, THE COMBINATION COMPRISING MEANS FOR GENERATING AN INPUT ERROR SIGNAL REPRESENTATIVE OF THE ERROR BETWEEN THE CONTROLLED CONDITION AND THE SET POINT VALUE, RESET MEANS FOR PRODUCING A RESET SIGNAL WHICH VARIES SUBSTANTIALLY AS A TIME INTEGRAL FUNCTION OF SUCH ERROR, AMPLIFYING MEANS COUPLED TO RECEIVE SAID INPUT ERROR SIGNAL AND SAID RESET SIGNAL FOR CREATING AN OUTPUT SIGNAL REPRESENTING THE ALGEBRAIC SUM THEREOF, MEANS COUPLED TO RECEIVE SAID OUTPUT SIGNAL AND RESPONSIVE THERETO FOR CORRECTIVELY RESTORING THE CONTROLLED CONDITION TO THE SET POINT VALUE WITH PROPORTIONAL AND RESET ACTION, SAID AMPLIFYING MEANS INCLUDING MEANS FOR GENERATING AN INTERNAL ERROR SIGNAL REPRESENTATIVE OF THE SAID ALGEBRAIC SUM, AND MEANS COUPLED TO RECEIVE AT LEAST SAID INTERNAL ERROR SIGNAL AND RESPONSIVE THERETO FOR IN-
References Cited (Backward Citations)
US2788441A
Cited
US2830245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |