Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
In a coin operated lock unit having a coin operated patron key lock adapted to effect locking of a cabinet door, the improvement featuring adjustment of the patron lock to accommodate different coin denominations, as well as varying numbers of coins of each denomination.
patent: 3228506 (1966-01-01), Stackhouse
patent: 3599770 (1971-08-01), Stackhouse
Barth Douglas A.
Stackhouse Wells F.
American Locker Company, Inc.
Tollberg Stanley H.
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