System for indicating measured values

Details System for indicating measured values System for indicating measured values

1978-07-06

1980-10-07

Tokar, Michael J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324173, 324166, G01P 336

Patent

active

042271509

ABSTRACT:
A system for indicating measured values, particularly the speed of movement of a motor vehicle, includes a pulse generator generating pulses having a frequency corresponding to a measured value, a counting circuit including first and second counters for counting pulses generated during successive time intervals to produce a pulse count signal for each time interval, a comparator comparing the pulse count signals from successive time intervals to produce a pulse difference signal corresponding to the difference therebetween, a memory for storing the pulse difference signal and transmitting the pulse difference signal to a stepper motor, and a pointer driven via gears from the output of the stepper motor to produce an indication of the measured value.

REFERENCES:
patent: 3398288 (1968-08-01), Sanders et al.
patent: 3639753 (1972-02-01), Reich
patent: 3731301 (1973-05-01), Davis
patent: 4056778 (1977-11-01), Randazzo

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