Check-actuated control mechanisms – Including means to test validity of check – By testing material composition
Reexamination Certificate
2006-09-19
2006-09-19
Matecki, Kathy (Department: 3653)
Check-actuated control mechanisms
Including means to test validity of check
By testing material composition
C194S317000, C194S320000, C194S328000
Reexamination Certificate
active
07108120
ABSTRACT:
A coin inspection method and apparatus capable of inspecting coins having different materials and surface patterns with high accuracy by a simple coil arrangement. An exciting coil is arranged in the vicinity of one side of a coin passage inclined at a predetermined angle so that two magnetic poles thereof face the coin passage. Two receiving coils having substantially identical characteristics are arranged in the vicinity of the same side of the coin passage so that the receiving coils are electromagnetically coupled with the exciting coil. The exciting coil is excited at a predetermined frequency and an oscillation voltage of the exciting coil is detected. Also, an influence of a reactive magnetic field produced by eddy current induced on a surface of the coin is detected by the receiving coil. Material of the coin can be determined based on the oscillation voltage level of the exciting coil. The degree of the reactive magnetic field differs depending on a difference in surface irregularity of the coin, so that the coin can be discriminated based on the difference in irregularity. The apparatus is simple in construction and thus manufacturable at low cost.
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Abstract of JP 59-168589.
Kabushiki Kaisha Nippon Conlux
Koda & Androlia
Matecki Kathy
Shapiro Jeffrey A.
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