Apparatus for reading a line marking

Details Apparatus for reading a line marking Apparatus for reading a line marking

1984-09-07

1987-01-13

Trafton, David L.

Registers

Coded record sensors

Readout control

235463, 235470, 235474, G06K 700

Patent

active

046366237

ABSTRACT:
The apparatus comprises a reading surface which is formed by a plurality of photo-diodes. Each photo-diode is connected to an input of an AND-gate. The AND-gates each have another input which receives pulses from a scanner which distributes pulses to the inputs of the AND-gates in turn. The AND-gates are actuated in turn and, if the associated photo-diode is illuminated by the image of a marking element passes a signal to a counter. A decoder connected to the counter produces a signal indicating how many of the photo-diodes are illuminated and, thus, the length of the marking element.

REFERENCES:
patent: 3428817 (1969-02-01), Hofmeister et al.
patent: 3588452 (1971-06-01), Kee
patent: 3780270 (1973-12-01), Faulkner et al.
patent: 3790756 (1974-02-01), Graves et al.
patent: 4070584 (1978-01-01), Chartraire et al.
patent: 4408121 (1983-10-01), Galatha

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