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Money validator

  • US 5,992,600 A
  • Filed: 06/19/1996
  • Issued: 11/30/1999
  • Est. Priority Date: 11/30/1993
  • Status: Expired due to Term
First Claim
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1. A method of classifying a test article as one of a plurality of acceptable denominations of articles of currency, comprising:

  • deriving a plurality of measurement signals from a test article; and

    applying an acceptance process to said measurement signals, said acceptance process calculating first, second and third outputs indicating correspondence with first, second and third denominations, wherein for each said test item said acceptance process is performed a plurality of times, differently adjusted to compensate for the effects of measurement drift for at least said first, second and third denominations at each performance, and in that in each performance of said acceptance process, an output corresponding to the denomination for which the acceptance process is adjusted is calculated, and at least two other outputs for two different denominations are also calculated.

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