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 211
solid revolv-ing mould therein employed; but in completing the upper part onthe small block, Fig. 195, the burnisher and the rubber may be con-sidered equivalent to the two antagonist forces, which lead the ham-mered vessel inwards or outwards, at the will of the operator. 206 WORKS IN SHEET METAL,… … Fig. 210 represents the first stage of making the half of a cop-per ball; the metal is first driven with a mallet into a concave bed,generally of wood, in which it is hastily gathered up to a sweep ofabout the third part of a sphere, as a, a, Fig. 211; but this puckersup the edge like a piece of…
Metal-work · Electrometallurgy · Metallurgy
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