The practical metal-worker's assistant : containing the arts of working all metals and alloys, forging of iron and steel, hardening and tempering, melting and mixing, casting and founding, works in sheet metal, the processes dependent on the ductility of the metals, soldering, and the most improved processes, and tools employed by metal-workers, with the application of the art of electro-metallurgy to manufacturing processes : collected from original sources, and from the works of Holtzapffel, Bergeron, Leupold, Plumier, Napier, and others ... (1851)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 308
r thenhangs loosely on the square shank of the drill tool, or cutter bar,and when the pinion on the handle is only one-third or fourth of thesize of the bevel wheel with the square hole, it is an effective driverfor various uses; the long tail or lever serves to prevent the rotationof the driver,… … Fig. 360. are all driven by hand power, and are carried to the work. I shallconclude this section with the description of a more recent drilltool of the same kind, invented by Mr. OKelly of Dublin. This instrument is represented of one-eighth size, in the side view,Fig. 361, in the front view, 362,…
Metal-work · Electrometallurgy · Metallurgy
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