Method and apparatus for currency validation
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United States of America Patent
Stats
-
Dec 9, 1986
Grant Date -
N/A
app pub date -
Oct 10, 1984
filing date -
Oct 10, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved currency validator having an electrical signal generating sensor for scanning an area of a bank note and generating a sequence of electrical signals in response to the currency identifying characteristics detected by the sensor in the area scanned is described. Circuitry is provided for measuring the intervals between the generated signals, classifying each of the measured intervals into one of a plurality of sets and determining the difference between the number of intervals in one of said sets and the number of intervals in another of said sets. By comparing the above difference with a constant, information concerning the validity or denomination of the bank note is obtained. Additional circuitry is described for normalizing measured intervals and set bounds to take into effect variations in the speed of transport of banknotes which are to be discriminated.
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