Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
In a two coin operated lock unit having a coin operated patron key lock adapted to effect locking of a cabinet door, the improvement featuring the utilization of a coin selector adapted to adjustably accommodate the lock for operation by coins of differing denomination.
patent: 3613855 (1971-10-01), Stackhouse et al.
patent: 3938640 (1976-02-01), Stackhouse et al.
Barth Douglas A.
Chester Richard J.
American Locker Security Systems, Inc.
Tollberg Stanley H.
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