Liquid level sensing switch

Details Liquid level sensing switch Liquid level sensing switch

1974-06-03

1976-01-20

Smith, Jr., David

Electricity: circuit makers and breakers

Float

Float and pressure

340 59, 340244, H01H 3518

Patent

active

039341038

ABSTRACT:
A liquid level sensing switch has an open ended chamber in an electrically conductive body, has an insulating bushing disposed in the open end of the body chamber and has a contact member extending through the bushing to dispose one end of the contact member in spaced relation to the body at the closed end of the body chamber. An electrically conductive magnetizable ball is disposed in the chamber for movement between a closed circuit position engaging both the body and the contact member and an open circuit position spaced from one of these components. A float is mounted on the body exteriorily of the chamber and carries a magnet so that movement of the float between two positions outside the body in response to change in liquid level is effective to move the ball between open and closed circuit positions within the body chamber.

REFERENCES:
patent: 2783326 (1957-02-01), Hanson et al.
patent: 2927176 (1960-03-01), Auld, Jr. et al.
patent: 3103562 (1963-09-01), Dinoia
patent: 3750124 (1973-07-01), Barnes et al.

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