Device for discriminating between coins

Details Device for discriminating between coins Device for discriminating between coins

1989-03-06

1991-06-04

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

G07D 508

Patent

active

050206532

ABSTRACT:
A coin discriminating device is provided which includes a circuit having a coin sensor and a capacitor connected to the coin sensor in parallel. The circuit is disposed adjacent to a passageway through which coins move in a certain direction. A direct voltage source is connected to the circuit to supply electric current through a switching element. A first responsive circuit is connected between the circuit and a switching element and responds to characteristic damped oscillations which occur in the circuit when the switching element is turned off. A passage detecting circuit is disposed adjacent to the circuit to detect the presence of a coin in the passageway. A second responsive circuit turns the switching element off in response to an output signal from the passage detector. The characteristic damped oscillations are processed and compared with stored signals for a match in order to distinguish one coin from another.

REFERENCES:
patent: 3916922 (1975-11-01), Prumm
patent: 3918564 (1975-11-01), Heiman et al.
patent: 4108296 (1978-08-01), Hayashi et al.
patent: 4234072 (1980-11-01), Prumm
patent: 4286703 (1981-09-01), Schuller et al.
patent: 4334604 (1982-06-01), Davies
patent: 4349095 (1982-09-01), Davies
patent: 4601380 (1986-07-01), Dean et al.
patent: 4625851 (1986-12-01), Johnson et al.
patent: 4625852 (1986-12-01), Hoormann

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