Direction of movement sensing device for a perforated code carri

Details Direction of movement sensing device for a perforated code carri Direction of movement sensing device for a perforated code carri

1974-04-01

1976-02-03

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, 356199, G01N 2130

Patent

active

039366502

ABSTRACT:
A direction sensing device for a punched tape which is capable of movement linearly through an optical reading apparatus. The device is of a simplified design that is easily incorporated with the optical reading apparatus. The basic structure includes means for dividing the light projected from the light source, and a pair of photosensitive members that are activated in sequence thereby determining the direction of movement of the tape.

REFERENCES:
patent: 2916624 (1959-12-01), Angel et al.
patent: 2944157 (1960-07-01), McAuslan et al.
patent: 3067934 (1962-12-01), Amacher et al.
patent: 3143655 (1964-08-01), Strandberg
patent: 3248554 (1966-04-01), Chexl
patent: 3469103 (1969-09-01), Erpel
patent: 3749925 (1973-07-01), Hertrich
patent: 3768911 (1973-10-01), Erickson
patent: 3808447 (1974-04-01), Leaveni, Jr.

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