Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1995-03-07
1997-05-20
Bartuska, F. J.
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
453 10, G07D 314
Patent
active
056304943
ABSTRACT:
A coin discrimination sensor and coin handling system for discriminating among desired and undesired coins, comprised of an excitation coil for producing an alternating magnetic field. These alternating magnetic fields couple to the desired and undesired coins to induce eddy-currents. The sensor also is comprised of a detection coil for detecting eddy-currents from desired and undesired coins. The detection coil produces a differential voltage corresponding to the composition of the desired and undesired coins being sensed.
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Bartuska F. J.
Cummins-Allison Corp.
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