Vehicle elapsed mileage indicator

Details Vehicle elapsed mileage indicator Vehicle elapsed mileage indicator

1982-05-21

1985-02-19

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Measuring or testing

3281291, 368 5, 368 8, 340 52D, 307 10R, G04F 1304, G01R 2310

Patent

active

045010056

ABSTRACT:
A device for indicating required vehicle maintainence at predetermined elapsed mileage intervals includes a clock generator which is driven by the vehicle engine ignition pulse. The clock output is fed to a frequency divider, which in turn drives four counters. Each counter includes AND logic connected to selected outputs thereof to be switched on after a pre-determined count is obtained by the counter. The AND logic of each counter drives a flip-flop which actuates an LED warning lamp. Each counter circuit includes a reset button which resets the counter and its associated flip-flop. The LEDs may be labelled with a service function which should be performed after the time interval indicated by the respective LED.

REFERENCES:
patent: 4031363 (1977-06-01), Freeman et al.
patent: 4284972 (1981-08-01), Chiu et al.
patent: 4404641 (1983-09-01), Bazarnik

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