Liquid level detector

Details Liquid level detector Liquid level detector

1984-02-21

1986-04-15

Yuen, Henry C.

Liquid heaters and vaporizers

Indirectly heated

Separate fluid

122504, 122447, 1224511, 73295, F22B 102, G01F 2324

Patent

active

045820252

ABSTRACT:
A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

REFERENCES:
patent: 2252492 (1941-08-01), Cortese
patent: 2543558 (1951-02-01), Spence
patent: 2619566 (1952-11-01), Mahoney
patent: 2629551 (1953-02-01), Audino
patent: 2997989 (1961-08-01), Jones
patent: 3512412 (1970-05-01), Weining
patent: 3712137 (1973-01-01), Zavod
patent: 3935738 (1976-02-01), Benham
patent: 4354094 (1982-10-01), Massey et al.
patent: 4449404 (1984-05-01), Bohme et al.

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