Liquid level alarm apparatus for a tank of a vehicle

Details Liquid level alarm apparatus for a tank of a vehicle Liquid level alarm apparatus for a tank of a vehicle

1975-09-04

1977-07-19

Caldwell, John W.

Communications: electrical

Selective

Having indication or alarm

200 84C, 340244E, B60T 1722

Patent

active

040371930

ABSTRACT:
A liquid level alarm apparatus for a tank of a vehicle comprising a float having a permanent magnet, a pair of electrical contacts opened or closed in response to the proximity of said magnet, and a stopper for limiting the upward movement of the float, said contacts being connected by leads to an electric circuit comprising an alarm device. The contacts are maintained in a closed condition when the liquid in the tank is above a predetermined level and the contacts are separated, which operates the alarm of the alarm device, when the liquid in the tank is below the predetermined level.

REFERENCES:
patent: 3351084 (1967-11-01), Halkiades
patent: 3437771 (1969-04-01), Nusbaum
patent: 3633193 (1972-01-01), Milo
patent: 3654956 (1972-04-01), Tsubouchi
patent: 3659064 (1972-04-01), Inoue
patent: 3750124 (1971-09-01), Barnes et al.
patent: 3751614 (1973-08-01), Jones
patent: 3805230 (1974-04-01), Sakasegawa et al.
patent: 3978299 (1976-08-01), Takai

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