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Expired Canadian patentCanada

Control system and method for a steam turbine having a steam bypass arrangement

CA 1188732 A · Owner: Westinghouse Electric Corporation · Inventors: Podolsky, Leaman B.; Mccloskey, Thomas H.; Binstock, Morton H.

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Abstract From the Canadian patent

A DEH (digital electrohydraulic) control system for a steam turbine generator having a steam bypass system. The turbine system includes a high pressure turbine having throttle and governor steam admission valves as well as an intermediate pressure turbine having stop and interceptor steam admission valves. The turbine is brought on line by initially controlling steam admission into the intermediate pressure turbine by modulating the interceptor valve in response to a speed error signal generated as a result of the difference between actual and a predetermined reference speed. During this initial control the throttle valve remains in a closed position. When the turbine speed has attained a …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted June 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1983
GrantedJune 11, 1985
Term endedJune 11, 2002
Patent numberCA 1188732 A
Classification (IPC)F01D17/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJune 29, 1983Patent grantedJune 11, 1985Term endedJune 11, 2002

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.