Coin discriminator

Details Coin discriminator Coin discriminator

1990-03-16

1991-09-17

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

73163, G07D 508

Patent

active

050486624

ABSTRACT:
A coin discriminator discriminates a genuine coin from a counterfeit on the basis of a real component and an imaginary component of an impedance of the coin produced from a high frequency alternating current bridge circuit and decides an amount of the coin when the coin is genuine. An automatic balancing circuit having a sufficiently long time constant is employed to detect variations in the real component and the imaginary component of the impedance due to insertion of the coin. Whether the coin is genuine or counterfeit is discriminated on the basis of peak values of both variations and when the coin is genuine, an amount of the coin is decided.

REFERENCES:
patent: 3749220 (1973-07-01), Tabiichi et al.
patent: 4275806 (1981-06-01), Tanaka et al.
patent: 4431014 (1984-02-01), Yokomori
patent: 4471864 (1984-09-01), Marshall
patent: 4690263 (1987-09-01), Yokomori
patent: 4946019 (1990-08-01), Yamashita

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