Low liquid level sensing and warning circuit

Details Low liquid level sensing and warning circuit Low liquid level sensing and warning circuit

1983-04-25

1985-09-03

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

73308, 73313, 340623, B60Q 100

Patent

active

045395470

ABSTRACT:
A circuit for sampling the conditions of a liquid level sensor for a short period of time after the circuit is turned on and energizing a warning indicator for an initial check-out period that is followed by continuous energization in the event the sensor indicates a low liquid level condition during the sampling period.

REFERENCES:
patent: 1280222 (1918-11-01), Hester
patent: 1768446 (1930-06-01), Gron
patent: 2700153 (1955-01-01), Huckabee
patent: 2766406 (1956-10-01), Schwarzkopf
patent: 3196389 (1965-07-01), Heidner
patent: 3601793 (1971-08-01), Otta
patent: 3605086 (1971-09-01), Triska
patent: 3711827 (1973-01-01), Houseman
patent: 3787733 (1974-01-01), Peters
patent: 3939470 (1976-02-01), Arai et al.
patent: 4023137 (1977-05-01), Olsbo et al.

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