Electronic liquid level monitor and controller

Details Electronic liquid level monitor and controller Electronic liquid level monitor and controller

1978-07-21

1980-05-06

Cohen, Irwin C.

Fluid handling

Liquid level responsive or maintaining systems

Electrical characteristic sensing

68207, 73301, 137387, 340618, F16K 2116

Patent

active

042012406

ABSTRACT:
The cycles of an oscillator varying in frequency in proportion to the changing level of a monitored liquid are counted over a fixed period of time. A derived submultiple of the count is compared relative to an electronically stored table of numbers indicative of known liquid levels. Predetermined relationships between the count and the table initiate control functions for maintaining or varying the level of monitored liquid during a programmed series of operations such as, for example, the programmed cycles of a microcomputer controlled clothes washing machine.

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patent: 4080828 (1978-03-01), Akita et al.
patent: 4084237 (1978-04-01), Beachem et al.

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