Automatic bilge pumping and alarm unit

Details Automatic bilge pumping and alarm unit Automatic bilge pumping and alarm unit

1990-01-18

1992-01-07

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 12, 417 36, 417 44, 417 63, F04B 4902

Patent

active

050785770

ABSTRACT:
A system for the automatic operation of a marine bilge pump is provided. The system comprises, in series, a fluid level detector, a fluid level discrimination circuit, and pump control circuitry. The fluid level detector uses an AC signal to determine when an unacceptable level of bilge water is present. The discrimination circuit determines when the fluid level detector is sensing a true level reading, as opposed to mere bilge water sloshing. If the water level is indeed too high, a bilge pump is activated. The system may be adapted for multiple pump operation. Furthermore, an emergency backup circuit, as well as alarms and a test circuit, may be added.

REFERENCES:
patent: 3941507 (1976-03-01), Niedermeyer
patent: 4171932 (1979-10-01), Miller
patent: 4341178 (1982-07-01), Price
patent: 4380091 (1983-03-01), Lively
patent: 4444545 (1984-04-01), Sanders et al.
patent: 4551068 (1985-11-01), Boudreaux
patent: 4652802 (1987-03-01), Johnston
patent: 4881873 (1989-11-01), Smith et al.
Humphries, James T. et al., Industrial Electronics, 3rd Edition, pp. 407-408 & 427.

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