Abstract: A mechanical coin checking device comprises a coin channel having a running rail, a coin acceptance shaft connected to the coin channel, a blocking element which is pivoted into the coin acceptance shaft if no coin is present and which, due to the weight thereof, pivots, after entry of a coin into the acceptance shaft, releases the acceptance shaft and blocks the coin channel at the same time, a confirmation photoelectric barrier which is disposed in the acceptance channel and detects the passage of a coin, an optical sensor for detecting the position of the blocking element and a control unit connected to the confirmation photoelectric barrier and to the optical sensor, the control unit, as a function of the signals of the confirmation photoelectric barrier and of the optical sensor, producing a credit signal for acceptance of the coin falling through the acceptance shaft.

Abstract: A container lock with a housing and, positioned in it, a bolt that can be displaced by actuating a handle, with an insertion shaft for inserting a coin, with a scanning device for scanning the diameter of the coin inserted into the insertion shaft as far as a scanning position, where the scanning device interacts with a blocking device in such a way that the bolt can be displaced only with a coin having a correct diameter. It is proposed that the scanning device should configure a fixing jaw, which securely grips the coin that is inserted in the insertion shaft so that it is partly accessible from outside in the scanning position with the bolt pre-locked to prevent its withdrawal.

Abstract: A coin holding mechanism is adapted for use in new coin operated lock units and in retrofitting previously installed lock units of the type adapted for "free" service in order to prevent return of a coin deposit to a patron until the lock unit is in a condition wherein a key operated patron lock cannot be placed/returned to locked position in which the key of the patron lock can be removed in the absence of another coin being properly placed on deposit within the lock unit.

Abstract: A coin mechanism for vending machines comprising a coin receptacle, a detector for unlocking a dispensing mechanism only when a coin of the proper size is received in the receptacle, and a coin retaining device for retaining coins deposited in the mechanism only when a selected product has been properly dispensed from the machine. The detector includes a wall defining part of a coin slot, a window in the wall, a coin holding lever for holding coins across the window only when such coins are of the proper denomination, and a detector arm for entering the window when it is open to prevent the actuation of the product dispensing mechanism and for enabling the actuation of the dispensing mechanism when the window is closed by a coin.