Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1988-02-05
1989-06-06
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
62171, 62305, 137428, 137429, 251 65, 261109, F16K 3134, F16K 3300
Patent
active
048362395
ABSTRACT:
The present invention discloses an apparatus for monitoring the level of a liquid such as water in a reservoir of a water cooling tower or the like wherein it is required to maintain a predetermined desired liquid level and for generating a first control signal for controlling the addition of make-up liquid to the reservoir and a second control signal for terminating the addition of liquid to the reservoir. The apparatus includes a float chamber having it bottom coupled to the reservoir for equalizing the water levels therebetween. A float is positioned within the float chamber for rising and falling with the level of monitored liquid therein. A float rod extends vertically upward from a central portion the float for movement therewith. A lever housing is fixedly secured in an intermediate position within the float chamber, and the lever housing pivotally mounts a lever member therein. The lever member has a long lever arm and a short lever arm. A first magnet having a first polarity is mounted to the distal end of the long lever arm for pivotal movement therewith while a second magnet having a second opposite magnetic polarity is mounted to that end of the lever housing adjacent the distal end of the long lever arm and the first and second magnets are oriented such that their magnetic fields repel one another when their axis are aligned.
REFERENCES:
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patent: 4438635 (1984-03-01), McCoy, Jr.
patent: 4577657 (1986-03-01), Alexander
Padgett, Jr. Charles P.
Walton George L.
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