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 216
to objects such as the jelly moulds,Fig. 217, although a common notion exists that they are rapidlymade by that^ method, but which is in general utterly impossiblewhen such objects are made in one piece. In all such cases, themetal has to undergo the same bendings and stretchings betweenthe dies as… … For example, the pattern or moulding, z, Fig. 219, is only in smallrelief, and yet the flat piece of metal a, would be cut in two or moreparts if suddenly compressed between the dies A, B; as the edges i,j, would first abruptly bend and then cut the metal, without givingit the requisite time to…
Metal-work · Electrometallurgy · Metallurgy
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