Oil-pressure warning apparatus for automobiles

Details Oil-pressure warning apparatus for automobiles Oil-pressure warning apparatus for automobiles

1990-09-13

1992-04-21

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340626, G08B 2100

Patent

active

051072483

ABSTRACT:
An oil-pressure warning apparatus for automobiles includes an oil-pressure switch which is turned on when the circulation pressure of engine oil drops below a predetermined level, an alarm circuit which provides an electrical path in response to the on-off operation of the oil-pressure switch, and a warning control circuit which energizes the alarm circuit when the oil-pressure switch is turned on and maintains the energization of the alarm circuit. Thus, even when the oil pressure switch fluctuates back and forth between its on and off positions, the warning lamp will not flash.

REFERENCES:
patent: 2728903 (1955-12-01), Myers
patent: 3119991 (1964-01-01), Nallinger
patent: 3866166 (1975-02-01), Kerscher, III et al.
patent: 3906440 (1975-09-01), Haupt
patent: 3927390 (1975-12-01), Hill
patent: 4021794 (1977-05-01), Carlson
patent: 4984543 (1991-01-01), Tharman

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