Tank level alarm control system

Details Tank level alarm control system Tank level alarm control system

1990-12-31

1992-06-23

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340623, 73308, 73DIG5, 200 84C, G08B 2100

Patent

active

051246864

ABSTRACT:
The gauge has an outer tube sealed at its lower end and adapted for attachment to the top wall of the tank, and an inner tube axially movable within the outer tube. A float encircles the outer tube and moves freely therealong. First and second magnets respectively attached to the float and to the lower end of the inner tube provide magnetic coupling therebetween so that a rising liquid causes the inner tube to rise with the float. Magnets within the inner tube operate a switch to signal when the first and second magnets are in position for magnetic coupling therebetween. Another magnet is fixed by a set screw to the outside of the inner tube in position for operating the switch when the tank is substantially full. Retaining clips are also disclosed for holding the latter magnet in place.

REFERENCES:
patent: 1348015 (1920-07-01), Lee
patent: 2671834 (1954-03-01), Kmiecik
patent: 2820865 (1958-01-01), McKinnies
patent: 4924703 (1990-05-01), White et al.

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