Sales computer utilizing sensor pairs

Details Sales computer utilizing sensor pairs Sales computer utilizing sensor pairs

1975-08-08

1976-10-12

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235 6112N, 235 616E, 250568, 35 48B, 3401463J, G06K 714, G09B 702, G06K 1906

Patent

active

039860019

ABSTRACT:
One pair of sensing elements is furnished for each column of a card being transported past the sensing element in the direction of the columns. The first and second sensing element constituting each pair are spaced apart from each other both in a direction perpendicular to the columns and in a direction along the columns. The marking signals generated by each sensor element in response to the same mark are therefore separated in time from each other and a delay circuit is furnished for delaying the first furnished marking signal until receipt of the second. Electric circuits are provided which furnish the signals for further processing to the computer only in the simultaneous presence of both of these signals. Further, a miscount indication is provided by additional logic circuits if one of the signals is missing while the other is present.

REFERENCES:
patent: 3487560 (1970-01-01), Hassfurther
patent: 3527927 (1970-09-01), Bijleveld
patent: 3710319 (1973-01-01), Miller
patent: 3845280 (1974-10-01), Dillon

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