Electronic odo/trip meter for automobiles

Details Electronic odo/trip meter for automobiles Electronic odo/trip meter for automobiles

1988-12-08

1991-09-03

Lall, Parshotam S.

Boots, shoes, and leggings

235 95R, 377 241, G01C 2200

Patent

active

050460293

ABSTRACT:
An electronic odo/trip meter for automobiles has a display for displaying a travel distance, a counter for enumerating the travel distance data, a non-volatile memory which is provided in the counter so as to prevent elimination of the travel distance data, and a control circuit which controls data transfer and includes a first detection circuit for detecting voltage-drop of a power supply and a second detection circuit for detecting resumption of the power supply. In the device according to the invention, the travel distance data of the counter can be stored in the non-volatile memory only when the first detection circuit detects a drop in the power supply, and the travel distance data of the non-volatile memory can be transferred into the counter only when the second detection circuit detects the resumption of the power supply.

REFERENCES:
patent: 4528683 (1985-07-01), Henry
patent: 4539641 (1985-09-01), Kawashimo et al.
patent: 4591782 (1986-05-01), Germer
patent: 4665497 (1987-05-01), Yamamura et al.
patent: 4710888 (1987-12-01), Burke et al.
patent: 4757522 (1988-07-01), Kieselstein
patent: 4803646 (1989-02-01), Burke et al.

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