Improved Means for Automatically Stopping the Feed-motion of Machine Tools.

摘要

117,079. Aktiebolaget Svenska Kullagerfabriken. June 20, 1917, [Convention date]. Driving and feed devices; gauges.-Consists in means for bringing into action an electric or mechanical device for stopping the feed-motion of a grinding or other machine when the work has been finished to gauge. Fig. 1 shows an electrical device for external work. A lever 3, 4 is brought by the adjusting means 12 below the centre of the work, so that it can just swing past when the work has been reduced to gauge. While the adjustment is being made, the lever may be held off the work by a hook 10. When the work is to gauge, the spring 8 swings the end 3 of the lever past the work and brings the hammer end 4 on to a contact piece 6 and presses it into contact with a lower piece and completes the circuit of an electric stop device for the feed-motion. Fig. 6 shows a modification for internal work, in which the end 3 of the lever bears on a second lever 15 carrying a roller 17 running on the work to be gauged. As shown in Fig. 3, wear of the end 3 of the lever may be reduced by shaping it to a curve struck from the centre of the pivot. In further modifications, a ball or a diamond forms the bearing end of the lever.