Patent US3214660A successfully refreshed from Google Patents.
US3214660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Rockwell Manufacturing Co
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Filing: 1960-11-07
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Granted: 1965-10-26
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Charles H Smoot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/208; F; F22; F22B; F22B35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
276 words
IN A PROCESS CONTROL SYSTEM HAVING CONTROLLER MEANS FOR GENERATING A CONTROL SIGNAL FOR CONTINUOUSLY CONTROLLING THE PROCESS, FIRST AND SECOND CONTROL DEVICES EACH PRODUCING AN OUTPUT SIGNAL GOVERNED BY THE DEVIATION BETWEEN A REFERENCE SIGNAL AND AN INPUT SIGNAL, MEANS FOR IMPRESSING THE OUTPUT OF SAID FIRST CONTROL DEVICE ON SAID CONTROLLER MEANS TO VARY THE CONTROL SIGNAL IN A DIRECTION TO REDUCE DEVIATION BETWEEN THE REFERENCE SIGNAL AND THE INPUT SIGNAL OF SAID FIRST CONTROL DEVICE, MEANS FOR IMPRESSING THE OUTPUT OF SAID SECOND CONTROL DEVICE ON SAID FIRST CONTROL DEVICE TO REPRESENT THE REFERENCE SIGNAL OF SAID FIRST CONTROL DEVICE, A MEASURING ELEMENT FOR PRODUCING A MEASURED VARIABLE SIGNAL PROPORTIONAL TO A TRANSIENT CONDITION OF THE PROCESS AND FOR IMPRESSING SAID MEASURED SIGNAL ON SAID FIRST CONTROL DEVICE TO REPRESENT THE INPUT SIGNAL OF SAID FIRST CONTROL DEVICE, A SIGNAL SOURCE FOR PRODUCING A SELECTIVELY FIXED SIGNAL AND FOR IMPRESSING SAID SELECTIVELY FIXED SIGNAL ON SAID SECOND CONTROL DEVICE TO REPRESENT THE REFERENCE SIGNAL OF SAID SECOND CONTROL DEVICE, MEANS FOR FEEDING BACK SAID OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE TO REPRESENT THE INPUT SIGNAL OF SAID SECOND CONTROL DEVICE, AND TRANSFER MEANS FOR SELECTIVELY REPLACING THE SELECTIVELY FIXED SIGNAL WITH SAID CONTROL SIGNAL AND THE FEED-BACK OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE WITH THE OUTPUT SIGNAL OF SAID FIRST CONTROL DEVICE TO THEREBY ALTERNATELY GOVERN THE OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE EITHER BY THE DEVIATION BETWEEN SAID SELECTIVELY FIXED SIGNAL AND THE FED-BACK OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE OR BY THE DEVIATION BETWEEN SAID SET CONTROL SIGNAL AND SAID OUTPUT SIGNAL OF SAID FIRST CONTROL DEVICE.
Claim 2
Dependent Claim
276 words
IN A PROCESS CONTROL SYSTEM HAVING CONTROLLER MEANS FOR GENERATING A CONTROL SIGNAL FOR CONTINUOUSLY CONTROLLING THE PROCESS, FIRST AND SECOND CONTROL DEVICES EACH PRODUCING AN OUTPUT SIGNAL GOVERNED BY THE DEVIATION BETWEEN A REFERENCE SIGNAL AND AN INPUT SIGNAL, MEANS FOR IMPRESSING THE OUTPUT OF SAID FIRST CONTROL DEVICE ON SAID CONTROLLER MEANS TO VARY THE CONTROL SIGNAL IN A DIRECTION TO REDUCE DEVIATION BETWEEN THE REFERENCE SIGNAL AND THE INPUT SIGNAL OF SAID FIRST CONTROL DEVICE, MEANS FOR IMPRESSING THE OUTPUT OF SAID SECOND CONTROL DEVICE ON SAID FIRST CONTROL DEVICE TO REPRESENT THE REFERENCE SIGNAL OF SAID FIRST CONTROL DEVICE, A MEASURING ELEMENT FOR PRODUCING A MEASURED VARIABLE SIGNAL PROPORTIONAL TO A TRANSIENT CONDITION OF THE PROCESS AND FOR IMPRESSING SAID MEASURED SIGNAL ON SAID FIRST CONTROL DEVICE TO REPRESENT THE INPUT SIGNAL OF SAID FIRST CONTROL DEVICE, A SIGNAL SOURCE FOR PRODUCING A SELECTIVELY FIXED SIGNAL AND FOR IMPRESSING SAID SELECTIVELY FIXED SIGNAL ON SAID SECOND CONTROL DEVICE TO REPRESENT THE REFERENCE SIGNAL OF SAID SECOND CONTROL DEVICE, MEANS FOR FEEDING BACK SAID OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE TO REPRESENT THE INPUT SIGNAL OF SAID SECOND CONTROL DEVICE, AND TRANSFER MEANS FOR SELECTIVELY REPLACING THE SELECTIVELY FIXED SIGNAL WITH SAID CONTROL SIGNAL AND THE FEED-BACK OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE WITH THE OUTPUT SIGNAL OF SAID FIRST CONTROL DEVICE TO THEREBY ALTERNATELY GOVERN THE OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE EITHER BY THE DEVIATION BETWEEN SAID SELECTIVELY FIXED SIGNAL AND THE FED-BACK OUTPUT SIGNAL OF SAID SECOND CONTROL DEVICE OR BY THE DEVIATION BETWEEN SAID SET CONTROL SIGNAL AND SAID OUTPUT SIGNAL OF SAID FIRST CONTROL DEVICE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |