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Device for detecting and rejecting invalid coins utilizing a verticle coin chute and multiple coin tests

  • US 4,483,431 A
  • Filed: 10/13/1981
  • Issued: 11/20/1984
  • Est. Priority Date: 10/13/1981
  • Status: Expired due to Fees
First Claim
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1. In a coin acceptor having a coin chute including coin entry and discharge ends and coin deflector means at the discharge end operable between coin accept and reject positions, the combination comprising first detector means disposed along said chute for detecting passage of a coin having predetermined physical characteristics, including predetermined diameter and surface reflectivity, and producing a first coin accept signal in response thereto, first circuit means including timing means responsive to said first coin accept signal for producing a timing signal of predetermined duration, second detector means disposed along said chute for detecting the topography of the side of a coin and producing a coin topography representative signal, second circuit means responsive to said timing signal for measuring said representative signal for said predetermined duration and producing an output signal when said representative signal is of a predetermined characteristic, third circuit means responsive to said output signal for operating said coin deflector means, third detector means disposed along said chute for detecting presence of magnetic material in a coin moving along said chute, said third detector means being connected to control said third circuit means to cause said deflector means to be at said deflecting position upon detection of said magnetic material, said third detector means including a permanent magnet disposed on one side of said chute and cooperating means disposed on the opposite side of said chute adjacent said magnet for measuring the Hall Effect produced by a coin moving along said chute therebetween.

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