Improved method of and means for locating and holding articles or work for machine tool operations such as boring, turning and the like

摘要

328,679. Peters & Co., Ltd., G. D., James, T. R., and Holey, W. H. Feb. 1, 1929. Vices.-Cylindrical or approximately cylindrical work 13 is held by a number of balls 8 projecting through slightly elongated holes in a member 6. The balls are arranged in groups of three, a series of projections 15 on the interior of the housings 3 and 4 maintaining them in position. Pressure is applied to the groups of balls 8 through an outer ring of balls 10 by means of a screwed ring 11 having a conical face 12.