| 摘要 |
The invention relates to a device which presents a batter with a moving ball simulating a ball which has been thrown or pitched. The device is designed to swing a tethered ball in a substantially horizontal path, thereby presenting a batter with a moving baseball. The tether extends through a hollow shaft and has one of its ends attached to a ball and its other end attached to a clamp; the clamp being adjustable along the outer surface of the hollow shaft. The shaft is supported on a base and is rotatable relative to the base by a motor.
|
