Patent US3623324A successfully refreshed from Google Patents.
US3623324A
Expired / Lapsed
US
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Electrohydraulic speed control system for cross compound turbine power plants
Assignee: General Electric Co
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Filing: 1969-07-15
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Granted: 1971-11-30
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Expires: 1989-07-15
Abstract
Abstract AN ELECTROHYDRAULIC SPEED CONTROL SYSTEM FOR AUTOMATICALLY MATCHING THE SPEED OF THE LOW PRESSURE AND HIGH PRESSURE SHAFTS OF A CROSS COMPOUND STEAM TURBINE-GENERATOR. THE LOW PRESSURE UNIT LIS CONTROLLED IN RESPONSE TO A SPEED SIGNAL FROM THE HIGH PRESSURE UNIT WHICH IS USED AS THE SPEED REFERENCE FOR THE LOW PRESSURE UNIT WHICH IS USED CONTROL. AN ACCELERATION CATCH-UP BIAS SIGNAL IS SUPPLIED TO THE LOW PRESSURE ACCELERATION CONTROL FOR ACCELERATION THE LOW PRESSURE ACCELERATION CONTROL FOR ACCELERATING DIFFERENCE TO ABOUT ZERO. A PREEMERGENCY CONTROL FOR CHANNEL INSURES THAT THE TURBINE WILL BE SAFELY CONTROLLED WHEN APPROACHING AN OVERSPEED CONDITION.
Inventors
- 👤 Markus A Eggenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:04
CPC Classifications
F; F01; F01D; F01D13/00; F01D13/003
Claims Analysis
Total Claims: 0
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |