Patent ID: 6417471
Filing Date: 2002-07-09
Classification: G07D,Y10S

Abstract:
A device for recognizing coins, comprising a transmitter element emitting electro-magnetic radiation, a receiver element for electro-magnetic radiation, by means of which an electrical measuring signal corresponding to an incoming electro-magnetic radiations generated, the arrangement of said transmitter and receiver elements being such that part of the electro-magnetic radiation emitted by said transmitter element is reflected from the surface of a coin brought into a test position as reflected electro-magnetic radiation, the reflected electro-magnetic radiation is received and transformed into a measuring signal by the receiver element further comprising an evaluator unit connected to said receiver element in which a wavelength-selective evaluating signal is generated and compared to wavelength selective comparison signal bands for comparing the electrical measuring signal generated by the receiver element and further processed to a wave-length selective evaluating signal, to a given comparison signal, and according to the result of such comparison generating a â€œfalseâ€  control signal or a â€œtrueâ€  control signal.