Coin validator

Details Coin validator Coin validator

G - Physics

07

D

324/44, 340/124.

G07D 5/02 (2006.01) G07D 5/08 (2006.01) G07F 3/02 (1990.01)

Patent

CA 1304782

ABSTRACT OF THE DISCLOSURE A coin validator of a static capacitance system for discerning the thickness and/or pattern of a coin in a non- contact manner. A pair of electrode assemblies including a first and a second sensor electrodes and a first and a second guard ring electrodes are disposed on the corresponding sides of a coin path. The first and the second guard rills electrodes prevent the dispersion of electric lines of force generated by the first and the second sensor electrodes. The first and the second sensor electrodes are impressed with resonating output signals from resonators. Under such condition, when the coin passes through the coin path between these electrodes. the entire inter-electrode capacitance changes to fluctuate the resonating output voltage and hence allow the thickness and/or pattern of the coin to be detected. The guard ring electrodes serve to focus the electric lines of force into a beam to thereby allow the thickness of the coin to be detected finely.

600222

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