Registers – Transfer mechanism – Traveling pawl
Patent
1973-11-13
1976-01-06
Ruggiero, Joseph F.
Registers
Transfer mechanism
Traveling pawl
176 19EC, 415 17, G06f 1556, G21c 736
Patent
active
039315037
ABSTRACT:
A combined digital computer/analog control system for operating a boiling water reactor-steam turbine-power plant wherein one of two analog throttle pressure controllers is used for controlling the inlet and bypass valves. One of the pressure controllers is biased to provide a higher signal than the other; and such nonbiased controller is the one selected to control the valves. Each controller includes a pressure transducer, a summing device and amplifier, and a lead/lag circuit together with the appropriate power supply.
A failure detection system is used to switch the controllers from automatic to manual when a predetermined combination of controller components becomes defective. Also, such system is so organized that a transducer failure for one controller causes the other controller to assume control regardless of whether such failure results in a higher or lower than proper signal.
REFERENCES:
patent: 3552872 (1971-01-01), Giras et al.
patent: 3572958 (1971-03-01), Jensen
patent: 3588265 (1971-06-01), Berry
patent: 3630839 (1971-12-01), Podolsky
patent: 3709626 (1973-01-01), Eggenberger
Berkebile Gary W.
Lardi Francesco
Podolsky Leaman B.
Patterson H. W.
Ruggiero Joseph F.
Westinghouse Electric Corporation
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