Speedometer/odometer/cruise control tester and related methods

Details Speedometer/odometer/cruise control tester and related methods Speedometer/odometer/cruise control tester and related methods

1989-11-14

1991-07-02

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

324202, 340515, G01D 1800

Patent

active

050276409

ABSTRACT:
An electronic motor control system is taught herein which utilizes a speedometer testing circuit. The (electronic) speedometer/odometer of a vehicle is tested, with the testing device being interconnected with the (input) terminals of the speedometer, exclusive of whether the speedometer is installed or removed from the vehicle. The testing device is utilized without vehicle input to the speedometer in order to determine whether the speedometer can produce an expected signal upon testing thus determining whether the speedometer is functional or not. The testing circuit has a self-contained power supply, is compact in size, and lightweight, thereby insuring complete mobility of the testing unit and dual application of the circuit to both installed and disengaged speedometer and odometer mechanisms. Use of the novel invention and related methods described herein eliminates the former dangerous necessity with prior art of having to test the speedometer which the rear tires of the vehicle are in motion, thus greatly improving the safety of the such testing procedures.

REFERENCES:
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patent: 4023395 (1977-05-01), Grumblatt
patent: 4185489 (1980-01-01), Sullivan, Jr.
patent: 4428224 (1984-01-01), Farazi et al.
patent: 4575664 (1986-03-01), Johnson
patent: 4701867 (1987-10-01), Bruggemann
patent: 4871993 (1989-10-01), Hayashi et al.
Archer Technical Data, TLC555 Timer, undated.

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