Incremental count display system

Details Incremental count display system Incremental count display system

1986-07-21

1987-08-04

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Including structure for detecting or indicating overflow...

377 24, 364561, G06M 306, G06F 1132

Patent

active

046851160

ABSTRACT:
An incremental count display system having a display (14) for displaying odometer information and trip odometer information. The display includes a display overflow indicia (21) that will not be permanently activated unless the odometer itself has been factory preset to an initial starting point of other than zero. Otherwise, the overflow indicia (21) must be reset with each display cycle. The trip odometer provides for an accurate count of trip mileage, even during a trip that includes an odometer memory rollover cycle. In addition, the trip odometer display makes use of a masking technique to avoid automatically writing to non-volatile memory (12). Also, an error indicia can be displayed in response to early failure detection.

REFERENCES:
patent: 3420988 (1969-01-01), Hunt et al.
patent: 3808407 (1974-04-01), Ratz
patent: 3864552 (1975-02-01), Phillips
patent: 4244514 (1981-01-01), Nomura et al.
patent: 4281389 (1981-07-01), Smith
patent: 4382178 (1983-05-01), Muri
patent: 4559637 (1985-12-01), Weber

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