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 204
Fig. 173.—Portable floor plate drilling machine. FLOOR-PLATE WORK 193 … 13 194 METHODS OF MACHINE SHOP WORK electric motor drive that has made the system feasible. Eachmachine is provided with its own motor, convenient plugs beingprovided for connecting at any convenient point. In eachcase also the machine is provided with a suitable lifting baleby which the overhead…
Machine-shop practice
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