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F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
F22D5/24—Controlling water feed or water level; Automatic water feeding or water-level regulators with electric switches
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FR55379D1941-02-111941-02-11
Automatic control method and devices based on differential temperature measurement
ExpiredFR55379E
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