Coin identification device for identifying a coin on the basis o

Details Coin identification device for identifying a coin on the basis o Coin identification device for identifying a coin on the basis o

1997-11-20

2000-05-30

Olszewski, Robert P.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07D 508

Patent

active

060681020

ABSTRACT:
A coin identification device for detecting a change in magnetic field due to eddy currents produced in a coin and identifying the coin on the basis of the detected change includes a path along which the coin moves, a sensor including two coils juxtaposed at a predetermined interval along the path and disposed such that a central axis of each of the two coils is in line with a direction perpendicular to an obverse or reverse of the coin moving along the path, and two magnetic impedance elements disposed respectively within the two coils to extend along the central axes of the two coils, and an identification circuit for outputting an identification signal for identification of the coin by differentially amplifying outputs of the two magnetic impedance elements.

REFERENCES:
patent: 4601380 (1986-07-01), Dean et al.
patent: 5609234 (1997-03-01), Walker et al.
patent: 5764055 (1998-06-01), Kawase

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