Bar code reader and decoder

Details Bar code reader and decoder Bar code reader and decoder

1976-12-13

1978-08-01

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

3401461AG, 3401463Z, 235 92CC, 235474, G06K 710, G06F 1100, G06G 700, G06K 7016

Patent

active

041045149

ABSTRACT:
A bar code reader and decoder for reading and decoding linear bar coded information through the use of a logarithmic time base generator. The ratio of the widths of the coding segments are computed for decoding the bar coded data by utilizing a logarithmic time base generator for providing a logarithmic measure of the widths of preselected coding segments and accumulating the logarithmic timing signals in up/down counters to provide a logarithmic representation of the ratios of the widths of the segments. The resultant count of an up/down counter is applied to a translation table to provide a signal representative of equality in widths between compared coding segments or the relative widths in terms of greater than or less than in the direction of scanning.

REFERENCES:
patent: 3402285 (1968-09-01), Wang
patent: 3701097 (1972-10-01), Wolff
patent: 3701886 (1972-10-01), Jones
patent: 3723710 (1973-03-01), Crouse
patent: 3866024 (1975-02-01), Williams
patent: 3886521 (1975-05-01), Dobras
patent: 3887792 (1975-06-01), Williams
patent: 4012716 (1977-03-01), Herrin

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