Patent US3276461A successfully refreshed from Google Patents.
US3276461A
Expired / Lapsed
US
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Control systems for hydraulic turbines
Assignee: English Electric Co Ltd
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Filing: 1964-06-19
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Granted: 1966-10-04
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Expires: 1984-06-19
Abstract
No abstract record available.
Inventors
- 👤 Kerensky Gleb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:56
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/02; F03B15/04; F03B15/06; F03B15/08; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A CONTROL SYSTEM FOR A HYDRAULIC TURBINE COMPRISING A GOVERNOR, FLOW CONTROL MEANS CONTROLLING THE FLOW OF WATER TO THE TURBINE RUNNER AND CONTROLLED BY SAID GOVERNOR TO CHANGE THE FLOW CORRESPONDING TO A CHANGE OF SPEED SENSED BY SAID GOVERNOR, AND RELIEF VALVE MEANS DIMENSIONED SO THAT IT IS ONLY CAPABLE OF PASSING A SMALL PROPORTION OF THE TOTAL FLOW OF WATER WHICH CAN PASS THROUGH THE TURBINE RUNNER WHEN SAID FLOW CONTROL MEANS IS IN THE MAXIMUM FLOW POSITION, SAID RELIEF VALVE MEANS CONNECTED TO SAID GOVERNOR THROUGH DASHPOT MEANS TO MOVE IN THE SENSE OF OPENING AT THE BEGINNING OF A CLOSING MOVEMENT OF SAID FLOW CONTROL MEANS, AND TO MOVE IN THE SENSE OF CLOSING AT THE BEGINNING OF AN OPENING
Claim 2
Dependent Claim
125 words
A CONTROL SYSTEM FOR A HYDRAULIC TURBINE COMPRISING A GOVERNOR, FLOW CONTROL MEANS CONTROLLING THE FLOW OF WATER TO THE TURBINE RUNNER AND CONTROLLED BY SAID GOVERNOR TO CHANGE THE FLOW CORRESPONDING TO A CHANGE OF SPEED SENSED BY SAID GOVERNOR, AND RELIEF VALVE MEANS DIMENSIONED SO THAT IT IS ONLY CAPABLE OF PASSING A SMALL PROPORTION OF THE TOTAL FLOW OF WATER WHICH CAN PASS THROUGH THE TURBINE RUNNER WHEN SAID FLOW CONTROL MEANS IS IN THE MAXIMUM FLOW POSITION, SAID RELIEF VALVE MEANS CONNECTED TO SAID GOVERNOR THROUGH DASHPOT MEANS TO MOVE IN THE SENSE OF OPENING AT THE BEGINNING OF A CLOSING MOVEMENT OF SAID FLOW CONTROL MEANS, AND TO MOVE IN THE SENSE OF CLOSING AT THE BEGINNING OF AN OPENING
References Cited (Backward Citations)
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |