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 232
ses where the required number of partscannot be made with a single jig. Such duplicate jigs are,frequently, not made at the same time—duplicate and triplicatejigs being made later than the first one as the necessity for themarises. Under the master-plate method the careful laying outof the holes is… … Face Flate MasferP/ateJig Fic. 209.—Transferring hole locations from a master plate to a jig. plates of a clock or watch. Obviously the locations of thebearings for the two ends of the shafts must correspond and, bothbeing made from the same master plate, this is assured. The sideframes of printing…
Machine-shop practice
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