| 摘要 |
A ball control device for combination with a ball tossing machine of the type having a rotating throw arm for propelling a ball. The ball control device has a proximal end for mounting to the throw arm and a terminal end. Between the proximal and terminal ends lies a slightly arcuate, open, longitudinal channel or trough that receives and controls a ball as the throw arm rotates. The ball advances along the surface of the channel until, upon rotation to a break over point, the ball is propelled from the terminal end of the device. To impart a curve, spin or drop to the ball, a spin actuator is mounted at the terminal end of the device. A surface portion of the ball, as it reaches the terminal end of the device (at the break over point), is momentarily engaged by the spin actuator, which, when the ball is propelled, induces a spin upon the ball in a manner that mimics the action of a pitcher's grip upon the ball.
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