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 141
the frame and a moving finger 1 These tables may be found in the .\merican Machinists Handbook by F. H.Colvin and F. .\. Stanley.9 130 :methods of machine shop work c is attached to a sliding bar d. The moving linger abutsagainst the multiplying lever e which plays over a graduatedscale at its top.… … Fig. 115.—Instrument for measuring the pitch of screw threads. error of the pitch is read in thousandths. The right-hand meas-uring finger is supplied in order to measure screws of less thanone inch length. All these devices are for the measurement of short screws.An equipment for measuring the…
Machine-shop practice
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