Data card and data card reader combination

Details Data card and data card reader combination Data card and data card reader combination

1978-07-28

1980-01-22

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

235489, 250555, G06K 714, G06K 1906, G08C 906

Patent

active

041846320

ABSTRACT:
A data card and data card reader combination including a data card incorporating two data tracks consisting of a plurality of perforations spatially arranged to represent encoded data. A card reader incorporates at least one radiant energy source, two radiant energy detectors, and guide means for guiding the movement of the data tracks between the radiant energy source and the radiant energy detectors whereby a first data pulse train and a second data pulse train corresponding to the perforations of said data tracks may be produced. An "OR" circuit receives the first data pulse train producing a clock pulse train, which in turn is fed to a holding shift register. A selector circuit selects the data pulse train exhibiting the first appearing pulse and in turn feeds the selected data pulse train to the holding shift register.

REFERENCES:
patent: 3211470 (1965-10-01), Wilson
patent: 3445635 (1969-05-01), Trickett et al.
patent: 3573731 (1971-04-01), Schwend
patent: 3673389 (1972-06-01), Kapsambelis et al.
patent: 4010355 (1977-03-01), Roehrman et al.

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