US3109130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple motor control system
Assignee: Leeds and Northrup Co
•
Filing: 1961-06-14
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Granted: 1963-10-29
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Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Cheng Theodore
- 👤 Warren D Macnabb
- 👤 Harold A List
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:35
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/34; G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CONTROL SYSTEM FOR MAINTAINING A DESIRED RELATION BETWEEN THE OUTPUT OF A PLURALITY OF FINAL CONTROL ELEMENTS COMPRISING MASTER MEANS RESPONSIVE TO THE MAGNITUDE OF A CONTROLLED VARIABLE FOR VARYING THE OUTPUTS OF SAID FINAL CONTROL ELEMENTS IN DIRECTIONS TO MAINTAIN SAID CONTROLLED VARIABLE AT A DESIRED VALUE, OUTPUT SIGNAL PRODUCING MEANS FOR PRODUCING OUTPUT SIGNALS REPRESENTATIVE OF THE INDIVIDUAL OUTPUTS OF SAID FINAL CONTROL ELEMENTS, BIASING MEANS FOR EACH OF SAID FINAL CONTROL ELEMENTS FOR ESTABLISHING REFERENCE LEVES REPRESENTATIVE OF RELATIVE OUTPUTS THEREFROM, SIGNAL DETECTING MEANS FOR EACH OF SAID FINAL CONTROL ELEMENTS, A CIRCUIT HAVING A PLURALITY OF PARALLEL BRANCHES, ONE FOR EACH OF SAID FINAL CONTROL ELEMENTS AND EACH BRANCH INCLUDING IN SERIES CIRCUIT RELATION FOR ONE OF SAID FINAL
Claim 2
Dependent Claim
124 words
A CONTROL SYSTEM FOR MAINTAINING A DESIRED RELATION BETWEEN THE OUTPUT OF A PLURALITY OF FINAL CONTROL ELEMENTS COMPRISING MASTER MEANS RESPONSIVE TO THE MAGNITUDE OF A CONTROLLED VARIABLE FOR VARYING THE OUTPUTS OF SAID FINAL CONTROL ELEMENTS IN DIRECTIONS TO MAINTAIN SAID CONTROLLED VARIABLE AT A DESIRED VALUE, OUTPUT SIGNAL PRODUCING MEANS FOR PRODUCING OUTPUT SIGNALS REPRESENTATIVE OF THE INDIVIDUAL OUTPUTS OF SAID FINAL CONTROL ELEMENTS, BIASING MEANS FOR EACH OF SAID FINAL CONTROL ELEMENTS FOR ESTABLISHING REFERENCE LEVES REPRESENTATIVE OF RELATIVE OUTPUTS THEREFROM, SIGNAL DETECTING MEANS FOR EACH OF SAID FINAL CONTROL ELEMENTS, A CIRCUIT HAVING A PLURALITY OF PARALLEL BRANCHES, ONE FOR EACH OF SAID FINAL CONTROL ELEMENTS AND EACH BRANCH INCLUDING IN SERIES CIRCUIT RELATION FOR ONE OF SAID FINAL
References Cited (Backward Citations)
US2657347A
Cited
CA534039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |