| 摘要 |
In a channel (1) in which coins run, a number of screens (3 ... 8), which are affected by light barriers, is arranged. As the front edge of the coin passes the first screen (3), the light barrier (AA') activates a counting device, which counts how many of the following screens (4 ... 8) are covered by the coin at the instant at which the back edge of the coin releases the first screen (3), corresponding to the diameter of the coin. <IMAGE>
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