Apparatus for detecting the voltage level of a power source for

Details Apparatus for detecting the voltage level of a power source for Apparatus for detecting the voltage level of a power source for

1991-01-11

1993-03-16

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

324426, 324500, G01P 342, G01N 27416

Patent

active

051948044

ABSTRACT:
Disclosed herein is a malfunction detection apparatus for use in an outboard engine or motor system having a tachometer. The apparatus includes a tachometer output circuit for applying the tachometer signal to the tachometer in accordance with the input signal attributing to the battery voltage or engine speed, the battery abnormality detecting circuit for detecting the abnormal condition of the battery voltage, to provide the detection signal and the switch circuit for suspending, in response to the detection signal, the application of the tachometer signal from the tachometer output circuit to the tachometer. The apparatus is advantageous in that the erroneous operation of the tachometer can be positively prevented.

REFERENCES:
patent: 4906055 (1990-03-01), Horiucni

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