Abstract: A method and apparatus for controlling the diameter of a clear extruded molten tube wherein the extruded tube contains a volume of a clear liquid and the level of the liquid is indicative of the tube diameter so the level rises as the tube diameter decreases. A light beam passing through the tube is refracted from a straight line path when the liquid level rises above the level of the beam. The refracting of the beam in turn triggers the introduction of air into the extruded tube to increase the diameter of the extruded, molten tube.

Abstract: A pinball type baseball game is disclosed in which a play surface simulating a baseball diamond is rotatably mounted on a frame. A plurality of figurines are adapted to be selectively and removably mounted on the play surface at predetermined locations representing the bases of the diamond. A selectively operable drive and control mechanism is provided in the frame for rotating the play surface on the frame in an apparently random sequence of different angular movements of one revolution or less to simulate movement of baseball players when the batter has achieved a "hit". The drive and control mechanism is activated by the projection of a ball on the play surface into a predetermined pocket on the play surface representing the "hit".

Abstract: A toy vehicle racing game is described utilizing a continuous, unguided vehicle race track with steeply banked curves and straight, flat horizontal track sections. The width of the unguided roadbed surface is selected so that vehicles may pass one another. A player-controlled chicane is employed in the path of the high speed vehicles. The chicane includes normally active slow-down devices which the players attempt to disable manually just at the time that their vehicle is about to pass over the chicane. Vehicles which are able to pass the chicane without a speed reduction travel over the high end of the steeply banked curves to pass other vehicles which were slowed down. A vehicle diverter is employed to segregate the vehicles on a right-left basis before traversing the chicane. The vehicle diverter employs track guides in dove-tailed relationship to guide the vehicles and prevent their bouncing off the track as they engage the track guides at high speeds.