Liquid level control device

F - Mech Eng,Light,Heat,Weapons – 15 – C

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73/129, 137/24

F15C 1/14 (2006.01) F15C 1/00 (2006.01)

Patent

CA 1223498

ABSTRACT A fluid amplifier for sensing the level of a liquid in a reservoir, storage tank or other container and for generating a differential in pressure signal in response to the static presence of the liquid level at a predetermined level. An inlet develops a liquid flow stream. A first passage of major cross-sectional dimensions is provided for delivering a major portion of the flow stream to the reservoir or storage tank. A second passage of minor cross-sectional dimensions is spaced laterally of the first passage for developing a small signal fluid power stream substantially parallel to the major supply stream. A sensor is responsive to the static presence of the liquid level at the predetermined level for altering the smaller fluid power stream from its substantially parallel flow condition to a condition in which it diverts and attaches to the major supply stream. A signal developing device is provided for receiving a fluid pressure signal of one magnitude when the fluid power stream is parallel to the major supply stream and of a second magnitude when the fluid power stream is diverted.

475373

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