User calibrated electronic speedometer and odometer

Details User calibrated electronic speedometer and odometer User calibrated electronic speedometer and odometer

1977-03-25

1979-09-11

Corcoran, Robert J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324166, G01P 2102

Patent

active

041676998

ABSTRACT:
A circuit is disclosed for driving an electronic speedometer (or tachometer) and an associated odometer of the type suitable for use in automobiles, trucks and tractors. The circuit includes a programmable divider which can be user calibrated so that a change in a system parameter, such as tire size, can be accommodated. The circuit employs a pulse generator producing timing pulses for a magnetically driven air core gauge. The timing pulses are produced in response to pulses indicative of the remote condition being sensed as, for example, wheel rotation or engine speed.

REFERENCES:
patent: 3739270 (1973-06-01), Miller et al.
patent: 3946311 (1976-03-01), Baker et al.
patent: 4074196 (1978-02-01), Webster

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