A roulette-like ball game machine has a rotary disk with a plurality of pockets arranged in a peripheral direction and assigned a number respectively, and a guide circle provided around the rotary disk at a somewhat higher position and joining to the rotary disk through an inclined surface. While the...http://www.google.de/patents/US5879235?utm_source=gb-gplus-sharePatent US5879235 - Ball game machine with a roulette-type rotary disk and a display located in the central area therein
