Patent ID: 6079262
Filing Date: 2000-06-27
Classification: G07D,G07F

Abstract:
A coin identification device, comprising:a surface of predetermined hardness upon which a coin to be identified can be dropped;a sound transducer positioned adjacent said surface for converting a sound into an electric signal;a plurality of filters connected to said sound transducer, with each filter of said plurality of filters passing an electronic signal corresponding to a distinct frequency band;a plurality of integrators connected, respectively, to each of said filters, with said integrators obtaining energy levels of each distinct frequency band;a memory capable of storing a plurality of predetermined energy levels in each distinct frequency band for one or more valid coins;a processor connected to said integrators and said memory, and capable of comparing said energy levels obtained by said integrators to said plurality of predetermined energy levels, and further capable of generating an acceptance signal when a comparison is successful; andand a means for connecting said integrators to said processor.