Patent US3139922A successfully refreshed from Google Patents.
US3139922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated controller
Assignee: Bendix Corp
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Filing: 1959-10-19
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Granted: 1964-07-07
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Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Peczkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:26
CPC Classifications
F; F15; F15B; F15B9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A CONTROLLER OPERATIVE TO POSITION AN OUTPUT MEMBER IN RESPONSE TO AN ERROR INPUT FORCE COMPRISING: TYPE 0 AND TYPE 1 SERVO MOTORS CONNECTED TO SAID OUTPUT MEMBER AND RESPONSIVE TO SAID ERROR INPUT FORCE TO CONTROL SAID OUTPUT MEMBER AS A FUNCTION OF SAID ERROR INPUT FORCE; AND MEANS CONNECTED TO SAID TYPE 0 SERVO MOTOR FOR VARYING THE GAIN THEREOF IN PROPORTION TO A RESPONSE CHARACTERISTIC OF THE DEVICE TO BE CONTROLLED.
Claim 2
Dependent Claim
122 words
CONTROL APPARATUS FOR USE WITH A GAS TURBINE ENGINE HAVING A COMPRESSOR, A TURBINE FOR DRIVING SAID COMPRESSOR, A COMBUSTION SECTION DELIVERING EXHAUST PRODUCTS TO SAID TURBINE, AND A FUEL CONTROL VALVE POSITIONABLE TO CONTROL A SUPPLY OF FUEL TO SAID COMBUSTION SECTION COMPRISING: A COMPARATOR OPERATIVE TO PRODUCE AN ERROR FORCE REFLECTIVE OF THE DIFFERENCE BETWEEN DESIRED AND ACTUAL COMPRESSOR SPEED; A TYPE 0 AND A TYPE 1 SERVO MOTORS HAVING INTERCONNECTED OUTPUT MEMBERS OPERATIVE TO POSITION SAID FUEL CONTROL VALVE; SAID SERVO MOTORS BEING CONNECTED TO SAID COMPARATOR AND RESPONSIVE TO SAID ERROR FORCE; AND MEANS RESPONSIVE TO COMPRESSOR SPEED CONNECTED TO SAID TYPE 0 SERVO MOTOR OPERATIVE TO VARY THE GAIN THEREOF IN RESPONSE TO VARIATIONS IN COMPRESSOR SPEED.
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |