The practical metal-worker's assistant : comprising metallurgic chemistry, 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, Scoffern, Clay, Fairbairn, and others (1872)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 393
391 PUNCHES. 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 by hand ; the drilling-shaft has four changes of speed, and geared Fig. 368. … with iron cone pulleys. This instrument will drill a hole ten inches from the nearest edge of the object operated upon, and six inches deep. Fig. 369 is the Universal Drilling Machine, manufactured at the Lowell Machine Shop, Lowell, Mass., of which establishment Wm. A. Burke is superintendent.…
Metal-work · Electrometallurgy · Metallurgy
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
