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 313
rel, and with the flange of the popit-head, enlarged into a table for the work, which then lies in the ho-rizontal position simply by gravity, or is occasionally fixed on thetable by screws and clamps. The structure of these important ma-chines admits of almost endless diversity, and in nearly… … convey the general characters of the drilling machines. The spindleis driven by a pair of bevel pinions, the one is attached to the axisof the vertical fly wheel, the other to the drill shaft, which is de-pressed by a screw moved by a small hand-wheel. Sometimes, as in the lathe, the drilling…
Metal-work · Electrometallurgy · Metallurgy
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