Abstract: A gas seal between a port (10, 12) of a rotary valve (7) and a port (8) in a combustion chamber (6) of a rotary valve engine, the seal comprising gas channel means (15) forming a turbo valve means (26) surrounding the port (8) in the combustion chamber and compression means (20, 21) for creating a pressure in the gas channel means greater than a pressure in the combustion chamber during a compression stroke and a power stroke of the engine.

Abstract: A game device for playing lottery-type games of chance includes a component programmed with software for playing one or more games, at least one game having one or more win levels. The component includes a plurality of ports being connectable to a printed circuit board in any of a plurality of configurations. Each configuration corresponds to an associated win level. The device further includes security mechanisms to inhibit a user from determining the configuration prior to the game being played. A method of producing such a game device includes providing a component programmed with software to run the game, and selectively connecting a plurality of ports on the component to a plurality of tracks on the printed circuit board.

Abstract: A roulette wheel assembly and table arrangement includes a roulette wheel rotatably mounted in a wheel bowl, and driven by an electric motor. Thirty seven slot compartments are located around the wheel circumference to receive a roulette ball. In operation the wheel is rotated and the slot compartment floor is lowered to allow a ball from the previous game to be thrown outwardly and fall into a ball magazine. A firing breech is opened to allow a ball to enter a firing chamber. On the command, an air blower blows the ball into a firing tube which propels the ball tangentially onto the bowl in the opposite direction to the travel of the wheel. The ball travels across the bowl onto the wheel and finally lands in a compartment. Each player around the table has a betting station giving the betting choices that make up the game.

Abstract: A game device, preferably hand-held, has an electronic display pattern generator, a display, and a play button to initiate generation of a game which displays sets of symbols which "rotate" after the manner of a fruit machine and which can be held from "rotating" by a hold button. The device includes the capability of limiting the number of games playable, and a lock button allows a winning display to be locked irrevocably to establish proof of a win.

Abstract: A roulette apparatus has a table, a roulette wheel mounted to spin about a vertical axis with respect to the table, the wheel having a plurality of ball receptor cups at the periphery thereof and having a hub portion and a rim portion. The hub and rim portions are displaceable axially with respect to each other between a "play" position and a "return" position, for forming a gap between the hub portion and the rim portion when the hub and rim portions are in the "return" position. A return channel is provided beneath the wheel, whereby when a ball has been projected onto the spinning wheel and has fallen into one of the cups, and the hub and rim portions have been displaced to the "return" position, the ball rolls from the cup into which it has fallen, rolls through the gap, and then falls to the return channel.

Abstract: A mirror mechanism for a continuous-motion cinematograph film projector. A drive shaft is mechanically coupled to the film transport and is coupled through a slipping clutch to drive a cam. A cam follower riding on the cam profile oscillates a compensating mirror. Frame synchronization of the mirror scan is effected by detection of optical synchronizing marks on the film. Release pulses are generated in response to the synchronizing marks to energize a solenoid to release a blocking member which otherwise blocks movement of the cam.