Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Patent
1995-10-02
1996-10-29
Merritt, Karen
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
194203, G07D 508
Patent
active
055688551
ABSTRACT:
A coin detection and identifying apparatus and method, utilizes three closely aligned electric coils. The center coil is actively driven by an alternating current to generate a magnetic field that surrounds the center coil. The two outer coils are symmetrically disposed within the magnetic field generated by the center coil, and voltages are induced across the terminals of the outer coils which are indicative of the relative field strengths of the magnetic fields within the outer coils. A sample coin and test coin are interposed between the center coil and each of the outer coils, the coins operative to attenuate the surrounding magnetic fields. A controller compares the voltages across the terminals of the two outer coils to effectively compare the likeness of the sample and test coins. A coin sensing apparatus, located downstream of the coils, provides a plurality of optic emitter-detector pairs to detect the valid passage of a coin. The plurality of emitter-detector pairs are disposed to provide improved resistance to miscounting of coins and traditional gimmicks, such as tilting the device, used to cheat coin operated devices.
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Ferrantelli Joe
Hoffman Kirk D.
Huizenger Robert
Coin Mechanisms, Inc.
Lowe Scott L.
Merritt Karen
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