Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 231
r -a76S -^ \ .( >- X: i .) o (- / Fig. 206. Fig. 207. … Fig. 208.Disc method of accurately spacing holes. and, when placed in contact, they insure the proper distancesbetween centers, but, usually, the other elements of their loca-tions must be determined in some other manner. THE MASTER PLATE A feature of jig work which comes in as an industry grows…
Machine-shop practice
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
