Communications: electrical – Digital comparator systems
Patent
1979-06-13
1981-08-11
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
194 4R, 209534, 235449, 3401463C, G06K 900, B07C 500
Patent
active
042837081
ABSTRACT:
Apparatus for accepting a U.S. bill or other paper currency having a portrait area printed with magnetic ink with spaced parallel lines in the background portions thereof. A pair of zones of predetermined length normally containing said portions and disposed a predetermined distance from an edge of the bill are first magnetized and then moved past a magnetic head to produce a train of pulses spaced by time intervals corresponding to the distance between the lines. For each scanning zone the number of such time intervals falling within a predetermined range is counted, and the bill is rejected unless the number of such time intervals counted is at least a predetermined minimum. In another aspect of the disclosure, an area of the bill normally containing nonmagnetic ink is scanned by a sensor that generates a pulse edge on traversing a magnetic bill portion, and the bill is rejected if a predetermined number of pulse edges are generated during the scanning of such area.
REFERENCES:
patent: 3256984 (1966-06-01), Ptacek
patent: 3485358 (1969-12-01), Hooker
patent: 3509535 (1970-04-01), Berube
patent: 3890597 (1975-06-01), Hanchett
patent: 3937926 (1976-02-01), Jones et al.
patent: 3966047 (1976-06-01), Steiner
patent: 3976199 (1976-08-01), Schachter
Boudreau Leo H.
Rowe International Inc.
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