| 摘要 |
For use in connection with coin-operated vending machines or the like having a coin lock-out coil or solenoid which accepts or rejects coins depending on whether the sole solenoid is energized or de-energized, a detector circuit comprising electromagnetic beam emitters, electromagnetic beam sensors and circuits for interpreting the received signal and determining whether the coin lock-out solenoid is to be energized, thereby accepting a coin, or de-energized, thereby rejecting a coin. The emitter is directed toward an incoming coin slot with the moving coin reflecting the beam in a particular pulsed sequence depending upon the surface characteristics and contours of the coin. The beam sensor is so located as to pick up the pulsed reflected beam from the surface of the coin, which reflections are amplified, timed and counted, and analyzed to accept or reject the coin through energizing or de-energizing the coin lock-out solenoid.
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