Liquid level responsive proximity switch
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United States of America Patent
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Jul 14, 1981
Issued Date -
N/A
app pub date -
Sep 17, 1976
filing date -
Mar 17, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A liquid level responsive proximity switch for submersible sump and sewage pumps in which a magnetic float, normally buoyed on mercury or other conductive liquid, is submerged by a movable magnetic actuator to displace the mercury into contact with a pair of switch electrodes. The mercury, magnetic float and electrode assembly are housed in permanently sealed casing having a downwardly opened chamber for the actuator under the magnetic float.
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