Spher′i-cal-shot ma-chine′.
A machine for imparting a truly spherical form to steel or iron can- [2265] non-balls. The ball, hot from the molds or from subsequent heating, is placed in cups which are preferably caused to rotate in opposite directions and at different speeds. One of the cups is upon a spindle at the end of a shaft D, which has longitudinal motion by a tail-center, actuated by a hydraulic press or otherwise, and serves to press the cups together. The other cup-spindle C is fixed. The cups are slacked off at times during the operation, to bring fresh surfaces of the ball under operation.Shot and shell machine. |