Indicator of vehicle service intervals

Details Indicator of vehicle service intervals Indicator of vehicle service intervals

1974-11-04

1976-07-27

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

3403091, 324 94, 324182, G01C 2202

Patent

active

039720225

ABSTRACT:
An indicator of vehicle service intervals for use in a vehicle comprising a transducer for transducing the revolution of the transmission output shaft of the vehicle into an electrical signal, an electrolytic integrating element electrolytically corroded by the output signal of the transducer, and a display unit for giving visible and audible alarms in response to the circuit cut-off action of the time limit element. In the system, successive pulses representing the distance traveled by the vehicle are integrated to cause progressive electrolytic corrosion of the electrolytic integrating element, and the alarm is displayed when the total traveled distance attains a predetermined value.

REFERENCES:
patent: 3355731 (1967-11-01), Jones, Jr.
patent: 3432814 (1969-03-01), Bissett
patent: 3603880 (1971-09-01), Brecker, Jr.

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