Dual mode pay-in amusement machine slot - has additional play facility allowing increased stake playing using event generator drum for double win

摘要

A pay gaming machine includes a facility for normal and special play modes. The latter offers a double gain chance. Typically, the machine uses three revolving drums with symbols around their circumferences. When the drums come to rest in a designated winning position a set of contacts is closed to generate an input to set a flip-flop in a control circuit. The generated output is used to activate a stage indicating the amount won. A display indicates the value of the win. A separate drum is used as an event generator that allows special plays to be made in which the amount won is double the normal. Manually operated switches allow operator control. A separate display indicates special win amounts.