Liquid level sensing circuitry

Details Liquid level sensing circuitry Liquid level sensing circuitry

1981-08-25

1983-05-24

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340 59, G08B 2100

Patent

active

043852904

ABSTRACT:
Liquid level sensing circuitry useable for detecting the presence of an acceptable or unacceptable level for a liquid, such as engine oil. Prior to termination of the operation of the engine, the circuitry presents an unacceptable level indication at a control point. After completion of a time delay following termination of engine operation, an acceptable level must be presented for a time to cause an acceptable level indication at the control point which is maintained pending initiation of engine operation. Upon initiation of engine operation a first discernible indication is provided for a time period if the control point presents an unacceptable level indication with a second discernible indication provided for such time period if the control point presents an acceptable level indication.

REFERENCES:
patent: 3967238 (1976-06-01), Ridpath et al.
patent: 3978464 (1976-08-01), Miesterfeld
patent: 4263587 (1981-04-01), John

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