Registers – Coded record sensors – Synchronization
Patent
1978-06-21
1979-12-04
Cook, Daryl W.
Registers
Coded record sensors
Synchronization
235458, 235482, 250569, G06K 714, G08C 906
Patent
active
041767837
ABSTRACT:
A column sensor includes a disc which is rotatably supported at one end of a lever arm and in proximity to a card reading station of a manually operable card reader. The lever arm is itself supported for rotation and biased by a spring bearing on an end of the lever arm so that a circumferential surface of the disc is urged into contact with one of the major boundary surfaces of an elongated passageway in the card reader. As a card is moved through the passageway, incremental rotation of the disc due to contact of the circumferential surface thereof with a surface of the card is detected by a light source - light detector pair mounted on the lever arm and on opposing sides of the disc, with light being coupled from the light source to the light detector through a plurality of circumferentially-spaced, axially-extending apertures in the disc so that the light detector accordingly provides an alternating electrical output signal representative of the spacing of data columns on the card.
REFERENCES:
patent: 3496342 (1970-02-01), Milford
patent: 3529134 (1970-09-01), Ashworth
patent: 3586833 (1971-06-01), Schafer
patent: 4114028 (1978-09-01), Baio et al.
Cook Daryl W.
Ebco Industries, Ltd.
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