Coin validators

Details Coin validators Coin validators

1992-07-31

1994-08-16

Huppert, Michael S.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

194335, G07D 508

Patent

active

053378776

ABSTRACT:
A coin validator has a thickness sensor formed by two coils positioned one on each side of the coin path. The coil outputs are processed separately to derive values which, when combined, produce a thickness-indicating measurement which is independent of coin position. Each output may be processed to give values which are linearly dependent upon coin position with the same constant of proportionality. Alternatively, one output is scaled relative to the other to an extent dependent upon the thickness for which the coin is to be tested, so that the thickness-indicating measurement does not vary significantly over a region which corresponds to a likely maximum variation in the position of coins of that thickness.

REFERENCES:
patent: 4660705 (1987-04-01), Kai et al.
patent: 4971187 (1990-11-01), Furuya et al.
patent: 5002174 (1991-03-01), Yoshihara
patent: 5158166 (1992-10-01), Barson

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