Table tennis robot

Abstract From the Canadian patent

Table tennis balls are pushed by a rotated notched, feel disc from a hopper to a pair of rotated throwing discs which move each ball along either an adjustable, spin producing, bottom quide or an adjustable spin, producing, upper guide. Thrown balls hit back by a player into a retrieving net roll into a vertical tube having a hose connected to the upper and of the hopper which has a fan mounted therein to draw the balls through the hose into the hopper. The tubs is mounted on legs and the, hopper and a drive of the discs are mounted on a bar pivotal on a rob mounted adjustably on the tube. A crank drive carried by the bar and connected to the rod oscillated the bar to vary the direction of …