Liquid level shutoff control

Details Liquid level shutoff control Liquid level shutoff control

1974-09-09

1976-03-16

Scott, James R.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

340244C, 73304R, H01H 3518

Patent

active

039448452

ABSTRACT:
A liquid level shutoff control for minimum level control of conductive fluids. A pair of electrodes are disposed in the liquid at the minimum level desired for the fluid. The electrodes provide a conductive path for a high frequency electrical signal and circuits energize a controlled load such as a liquid heating or mixing apparatus whenever the electrodes are in contact with the fluid. Failure of the control circuit results in shut off of the controlled load thereby providing fail-safe minimum level control.

REFERENCES:
patent: 3206615 (1965-09-01), La Pointe
patent: 3680070 (1972-07-01), Nystuen

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