Differential float control

Details Differential float control Differential float control

1977-10-25

1979-08-28

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

Plural magnets

200 84C, H01H 900

Patent

active

041659350

ABSTRACT:
A differential float control is provided by a single switch and a single float wherein a vertical guide tube contains a magnetically operated switch, and a free float surrounds the tube and rises and falls with the liquid level and carries two magnets. As the float moves in one direction the switch is magnetically latched closed by one magnet and remains closed until unlatched by the other magnet as the float returns in the opposite direction. The switch may be normally open, or normally closed, so that movement of the float may provide any desired circuit sequence for operating a liquid level controlling pump or the like for maintaining the liquid level within prescribed limits.

REFERENCES:
patent: 3437771 (1969-04-01), Nusbaum
patent: 3646293 (1972-02-01), Howard

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