Abstract: An improved cabinet door mounting arrangement is disclosed, which allows removable mounting of one or more doors on a common hinge pin without requiring removal of the hinge pin from a cabinet.

Abstract: A lock unit incorporates an improved coin counter or mechanism adapted to selectively accommodate the lock unit for operation by one or more coins of a given denomination.

Abstract: A post office locker for use in the delivery of both letters and packages to tenants of a multiple tenant building or the like, wherein packages are stored in appropriately sized storage cabinets to which access may be gained by intended recipients by use of access keys placed by a mailman in the letter boxes of such recipients. Each cabinet is fitted with a latch mechanism permitting recipients to return doors of cabinets from which packages have been removed to locked condition in a manner providing for the "capture" of the access keys until removed by a mailman for subsequent use. Preferably, the doors are fitted with return mechanisms providing for locking of such doors automatically upon return thereof into closed condition.

Abstract: A two coin operated lock unit for effecting locking of a cabinet door, the improvement featuring the utilization of an improved coin selector mechanism adapted for adjustment to accommodate coins of differing denominations and for permitting free discharge of coins from the lock unit when of a diameter smaller than the diameter of a coin of a given denomination for which the selector mechanism is set, regardless of whether such coins are deposited before or after a first deposited coin of such given denomination.

Abstract: 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.