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 273
268 PUNCHES. eccentric wheels A A, which have their bearings on the faces of thesectors, which are transferred the length of their faces right andleft, the sectors being knife-edge shaped at the centres of motion0 0, which revolve with very little friction. When A A have madetheir revolution the… … Fig. 288 is a side view with one side of the frame removed. Apress constructed in this way, the follower moving down a spring S,may be used to return the moving parts when the press is relaxed. PUNCHES. Punches used without Guides.—This title may, at the firstglance, only appear to possess a very…
Metal-work · Electrometallurgy · Metallurgy
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