Electric type tachometer for vehicles

Details Electric type tachometer for vehicles Electric type tachometer for vehicles

1982-09-24

1984-09-04

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

G01P 348, G01D 354

Patent

active

044700113

ABSTRACT:
An electric tachometer having a bar-graph display representing revolutions per minute (r.p.m.) on two scales. One scale shows normal r.p.m. while an expanded scale is provided to more accurately indicate r.p.m. while an expanded scale is provided more accurately to indicate r.p.m. lower than a predetermined value. A detector determines whether engine r.p.m. is above a predetermined value and a selector switch permits selection to normal or an expanded display.

REFERENCES:
patent: 4086532 (1978-04-01), Aronson
patent: 4140970 (1979-02-01), Graziano
patent: 4223297 (1980-09-01), Nomura
patent: 4329641 (1982-05-01), Ikeda
patent: 4380733 (1983-04-01), Yano

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