Automatic Scribing Device for Centering Shafts Quickly
FOR centering short shafts in one shop, an automatic V-block takes the place of loose blocks and a surface gage. The accompanying illustration shows the device in use. It is made entirely of sheet steel. There are two vees for supporting the work and at the working end is a hinge pin for a scribing point, so arranged that the point will rise and draw a line when the chalked end of a shaft is pushed toward the hinge. A rubber band will serve to pull the marker down automatically.—H. MOORE.