Device for verifying coins
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United States of America Patent
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-
Apr 11, 1989
Grant Date -
N/A
app pub date -
Mar 25, 1987
filing date -
Jul 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to check whether the coin (2) has the impress design of an acceptable coin, the coin surface is scanned along a track (10) by an inductive probe (5), thus producing a signal which corresponds to the depth of the impression along the track (10). The relative movement of the probe (5), which is needed for scanning, in relation to the coin (2) is obtained as the coin (2) rolls past the probe (5). A memory stores, as comparison signals, signals obtained at mutually displaced tracks (10, 11) of the obverse side and reverse side of each acceptable coin. These signals are obtained as each coin to be verified rolls past the probe (5) from various starting positions. The verification signal received from the coin to be checked is compared with each of the stored comparison signals. If one of these comparisons results in coincidence within specific limits, then a coincidence signal is transmitted.
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