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 51
es a thick conical button. The head is completed, by drivingthe bolt into a heading tool with a circular hole of five-eighthsdiameter; the thickened part of the head prevents the piece frompassing through, and the lump is flattened out by the hammer intoan irregular button or disk, which is… … In upsetting the end of the work, if more convenient, it may b4eheld horizontally across the anvil, and struck on the heated extrem-ity with the hand hammer ; or it can be jumped forcibly upon theanvil, when its own weight will supply the required momentum. Iftoo considerable a portion of the work…
Metal-work · Electrometallurgy · Metallurgy
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