Electric starting sensor for battery-operated coin acceptors

Details Electric starting sensor for battery-operated coin acceptors Electric starting sensor for battery-operated coin acceptors

1994-01-21

1995-10-03

Bartuska, F. J.

Check-actuated control mechanisms

Including value accumulator for plural checks

Having solid state circuitry

194317, G07D 508

Patent

active

054544637

ABSTRACT:
An inductive starting sensor for a battery powered coin acceptor includes an oscillator whose output signal changes when a coin passes through the area of the starting sensor. The sensor includes a capacitor which can be discharged via a resistor. The capacitor is periodically charged via a transistor connected to the oscillator in an emitter follower circuit. The transistor becomes currentless upon a diminution of the oscillator voltage due to the damping of the inductance of the oscillator on account of a passing coin. A further transistor generates a starting signal for the coin acceptor when the first transistor becomes currentless.

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