Patent US3097490A successfully refreshed from Google Patents.
US3097490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Callan
Assignee: —
•
Filing: —
•
Granted: 1963-07-16
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Expires: 1980-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A STREAM TURBINE POWERPLANT HAVING VALVE MEANS, HIGH PRESSURE TURBINE, REHEATER, AND LOWER PRESSURE TURBINE CONNECTED IN SERIES FLOW RELATIONSHIP, THE COMBINATION OF: ELECTRO-HYDRAULIC CONTROL MEANS POSITIONING SAID VALVE MEANS IN RESPONSE TO A FIRST ELECTRICAL SIGNAL REPRESENTING A DESIRED STEAM FLOW THROUGH SAID VALVE MEANS, FIRST MEANS FURNISHING AN ELECTRICAL FEEDBACK SIGNAL TO SAID CONTROL MEANS FOR MODIFYING THE EFFECT OF SAID FIRST SIGNAL ON THE VALVE MEANS, SAID FEEDBACK SIGNAL BEING RESPONSIVE TO STREAM PRESSURE IN THE REHEATER AND HAVING A LAGGING CHARACTERISTIC, AND SECOND MEANS INCLUDING A FIRST ADJUSTABLE NETWORK FOR INDEPENDENTLY ADJUSTING THE TRANSIENT RESPONSE OF SAID VALVE MEANS TO CHANGES IN SAID FIRST SIGNAL WHILE ALSO COMPENSATING FOR THE LAG IN THE REHEAT PRESSURE FEEDBACK SIGNAL.
Claim 2
Dependent Claim
122 words
IN A STREAM TURBINE POWERPLANT HAVING VALVE MEANS, HIGH PRESSURE TURBINE, REHEATER, AND LOWER PRESSURE TURBINE CONNECTED IN SERIES FLOW RELATIONSHIP, THE COMBINATION OF: ELECTRO-HYDRAULIC CONTROL MEANS POSITIONING SAID VALVE MEANS IN RESPONSE TO A FIRST ELECTRICAL SIGNAL REPRESENTING A DESIRED STEAM FLOW THROUGH SAID VALVE MEANS, FIRST MEANS FURNISHING AN ELECTRICAL FEEDBACK SIGNAL TO SAID CONTROL MEANS FOR MODIFYING THE EFFECT OF SAID FIRST SIGNAL ON THE VALVE MEANS, SAID FEEDBACK SIGNAL BEING RESPONSIVE TO STREAM PRESSURE IN THE REHEATER AND HAVING A LAGGING CHARACTERISTIC, AND SECOND MEANS INCLUDING A FIRST ADJUSTABLE NETWORK FOR INDEPENDENTLY ADJUSTING THE TRANSIENT RESPONSE OF SAID VALVE MEANS TO CHANGES IN SAID FIRST SIGNAL WHILE ALSO COMPENSATING FOR THE LAG IN THE REHEAT PRESSURE FEEDBACK SIGNAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |