Liquid level sensor for controlling pump operation

Details Liquid level sensor for controlling pump operation Liquid level sensor for controlling pump operation

1985-08-01

1987-07-07

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 36, 307118, 318482, F04B 4900

Patent

active

046784039

ABSTRACT:
The invention concerns a bilge pump control system. Sensing of water level in the bilge is accomplished by the conduction of current (on the order of one milliampere) between two stainless steel probes. The probes are mounted in a triangular package which is placed in the boat bilge. When immersed, a conduction path is provided between the probes. One edge of the package is aligned with the probes to enhance water run-off. An associated circuit is activated when the conduction path is present (when the probes are immersed) which operates the bilge pump in a time-hysteresis fashion.

REFERENCES:
patent: 3397715 (1968-08-01), Fathauer
patent: 3502899 (1970-03-01), Jones
patent: 3800205 (1974-03-01), Zalar
patent: 3811051 (1974-05-01), Merrell
patent: 4171932 (1979-10-01), Miller
patent: 4182363 (1986-01-01), Fuller
patent: 4205237 (1980-05-01), Miller
patent: 4316174 (1982-02-01), Sutton et al.
patent: 4382231 (1983-05-01), Miller
patent: 4479116 (1984-10-01), Kobayaski
patent: 4550261 (1985-10-01), Hormel et al.
patent: 4600844 (1986-07-01), Atkins

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