A method for operating an electronic coin validator, wherein at least one test probe generates a measuring signal if a coin passes the probe. The digitized measuring signal is compared with an upper and a lower reference value which define an acceptance band. A validity signal is generated if the measuring...http://www.google.fr/patents/US5355989?utm_source=gb-gplus-shareBrevet US5355989 - Method and system for operating electronic coin validators
Method and system for operating electronic coin validators
