Switch system for indicating changes in liquid level

Details Switch system for indicating changes in liquid level Switch system for indicating changes in liquid level

1978-10-30

1980-12-09

Truhe, J. V.

Electricity: circuit makers and breakers

Float

Float and pressure

200 612, 340623, H01H 3518

Patent

active

042386527

ABSTRACT:
This invention relates to an improved method and apparatus for detecting the level of a first fluid. It includes a reservoir within the first fluid, the reservoir being bounded by a flexible membrane at its lower portion for containing a second fluid. The reservoir contains at least one switching means biased to assume a first position when the second fluid is below a predetermined level and adapted to assume a second position upon the rising of the first fluid into pressure exerting contact with the flexible membrane. The rising first fluid compresses the lower flexible membrane portion of the reservoir and causes the second fluid within the reservoir to also rise thereby causing the switching means to assume the second position.

REFERENCES:
patent: 2843144 (1958-08-01), Robinson et al.
patent: 2961508 (1960-11-01), Minneci et al.
patent: 3543580 (1970-12-01), McGill
patent: 3657501 (1972-04-01), Hoyt

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