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 350
produce a left-handthread, and so on alternately ; and this mode, in addition, allows thewheels M and S to be placed at any distance asunder that circum-stances may require. In making double thread screws the one thread is first cut, thewheels are then removed out of contact, and the mandrel is… … When the intermediate wheels are employed, it becomes necessaryto build up from the bearers some description of pedestal, or fromthe lathe-head some kind of bracket, which may serve to carry theaxes or sockets upon which the intermediate wheels revolve. Theseparts have received a great variety of…
Metal-work · Electrometallurgy · Metallurgy
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