Patent US3174529A successfully refreshed from Google Patents.
US3174529A
Expired / Lapsed
US
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Control system
Assignee: Garrett Corp
•
Filing: 1960-05-31
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Granted: 1965-03-23
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Expires: 1980-05-31
Abstract
No abstract record available.
Inventors
- 👤 Robert A Grosselfinger
- 👤 Frederic E Bolliger
- 👤 Ernst A Nussbaumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/0989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A GAS TURBINE POWER PLANT CONTROL SYSTEM OR THE LIKE, THE COMBINATION OF SPEED SENSING MEANS PROVIDING A TURBINE SPEED OUTPUT SIGNAL, DIFFERENTIATING MEANS FOR DIFFERENTIATING SAID TURBINE SPEED OUTPUT SIGNAL TO PROVIDE A COMPUTED SIGNAL WHICH IS AN APPROXIMATION TO A MATHEMATICAL DERIVATIVE THEREOF, THAT IS, A COMPUTED ACCELERATION PLUS A FACTOR IN CLUDING A SPEED COMPONENT PROPORTIONAL TO SAID SPEED OUTPUT SIGNAL, SAID DIFFERENTIATING MEANS INCLUDING INPUT MEANS MOUNTED FOR DISPLACEMENT PORPORTIONAL TO SAID TURBINE SPEED OUTPUT SIGNAL AND OUTPUT MEANS MOUNTED FOR DISPLACEMENT RESPONSIVE TO THE DISPLACEMENT OF SAID INPUT MEANS AND COUPLED TO SAID INPUT MEANS BY ELASTIC MEANS, SAID OUTPUT MEANS BEING VISCOUSLY DAMPED TO PROVIDE SAID COMPUTED SIGNAL WHICH INCLUDES AN APPROXIMATE DIFFERENTIAL OF THE DISPLACEMENT OF SAID INPUT MEANS PLUS A FACTOR INCLUDING A SPEED COMPONENT PROPORTIONAL TO SAID TURBINE SPEED OUTPUT SIGNAL, ADDER MEANS COMBINING THE DISLACEMENT OF SAID INPUT MEANS AND THE OUTPUT OF SAID OUTPUT MEANS TO SUBSTANTIALLY ELIMINATE SAID COMPONENT TO PROVIDE ANOTHER SIGNAL WHICH INCLUDES A CLOSE APPROXI-
Claim 2
Dependent Claim
171 words
IN A GAS TURBINE POWER PLANT CONTROL SYSTEM OR THE LIKE, THE COMBINATION OF SPEED SENSING MEANS PROVIDING A TURBINE SPEED OUTPUT SIGNAL, DIFFERENTIATING MEANS FOR DIFFERENTIATING SAID TURBINE SPEED OUTPUT SIGNAL TO PROVIDE A COMPUTED SIGNAL WHICH IS AN APPROXIMATION TO A MATHEMATICAL DERIVATIVE THEREOF, THAT IS, A COMPUTED ACCELERATION PLUS A FACTOR IN CLUDING A SPEED COMPONENT PROPORTIONAL TO SAID SPEED OUTPUT SIGNAL, SAID DIFFERENTIATING MEANS INCLUDING INPUT MEANS MOUNTED FOR DISPLACEMENT PORPORTIONAL TO SAID TURBINE SPEED OUTPUT SIGNAL AND OUTPUT MEANS MOUNTED FOR DISPLACEMENT RESPONSIVE TO THE DISPLACEMENT OF SAID INPUT MEANS AND COUPLED TO SAID INPUT MEANS BY ELASTIC MEANS, SAID OUTPUT MEANS BEING VISCOUSLY DAMPED TO PROVIDE SAID COMPUTED SIGNAL WHICH INCLUDES AN APPROXIMATE DIFFERENTIAL OF THE DISPLACEMENT OF SAID INPUT MEANS PLUS A FACTOR INCLUDING A SPEED COMPONENT PROPORTIONAL TO SAID TURBINE SPEED OUTPUT SIGNAL, ADDER MEANS COMBINING THE DISLACEMENT OF SAID INPUT MEANS AND THE OUTPUT OF SAID OUTPUT MEANS TO SUBSTANTIALLY ELIMINATE SAID COMPONENT TO PROVIDE ANOTHER SIGNAL WHICH INCLUDES A CLOSE APPROXI-
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |