On board indicator for motor vehicles

Details On board indicator for motor vehicles On board indicator for motor vehicles

1986-12-22

1988-08-02

Noland, Tom

Measuring and testing

Instrument mechanism dampening

340 59, 73308, 73313, G01D 302

Patent

active

047607360

ABSTRACT:
An on board indicator for vehicles is provided, including a sensor detecting a physical magnitude to be indicated, connected to a display device through a low pass filter whose cut off frequency is increased for a given time after switch on of the vehicle, by appropriate circuitry. A threshold detector controlling an alarm device is connected to the output of the low pass filter. Such an indicator may be used for indicating the fuel level in the reservoir of a motor vehicle, for example.

REFERENCES:
patent: 3813946 (1974-06-01), Robbins, Jr. et al.
patent: 4078751 (1978-03-01), Stalzlechner
M. Bozoian, Power-Up Relays Prevent Meter From Pinning, Electronics International, vol. 53, No. 19 (Aug. 1980, p. 157).

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