Abstract: A lottery apparatus comprising a receptacle from which lottery balls can pass into a mixing chamber. A screw conveyor in the form of a rotatable tube with an internal helical baffle extends horizontally from the mixing chamber to a discharge chamber. The end of the screw conveyor in the mixing chamber has a scoop attached thereto which serves to agitate the lottery balls in the mixing chamber and to feed one ball to the conveyor with each rotation of the conveyor. The rotatable tube is transparent so that progress of each lottery ball therethrough can be watched. Clear plastics are preferred materials for most apparatus parts. A manual crank or an electric motor is used to rotate the screw conveyor.

Abstract: A machine for mixing a plurality of balls of uniform size and sequentially dispensing the balls in random order wherein the balls are mixed in a closed mixing compartment by counter-rotating disks provided with circumferentially spaced agitator elements ensuring thorough mixing of the balls, and are dispensed from the bottom portion of the mixing compartment through an outlet capable of permitting passage therethrough of only one ball at a time.