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 294
289 The base and frame are of cast iron; the table that holds the•work is elevated or depressed by a screw. The drill feeds down byhand. The drilling shaft has four changes of speed, and geeredwith iron cone pulleys. This instrument will drill a hole ten inchesfrom the nearest edge of the object… … This machine is designed for drilling pieces of castings, which,from their size, cannot be operated upon by drilling machines ofthe ordinary kinds. It consists of a very strong upright frame orcolumn, which carries upon its front side a heavy beam or arm,that can be moved out from the column to the…
Metal-work · Electrometallurgy · Metallurgy
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