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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 276

An illustration from 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, leaf 276
,and afterwards hollowed for the hazel rod by which it is surroundedto constitute the handle. The smiths punch is frequently used alongwith a bottom or bed tool known in this case as a bolster, and whichhas a hole exactly of the same area as the section of the punch itself. Punches when used in… … V the straight blade of the shears is to be considered as bent roundinto a solid circle for a circular punch, or converted into a square,rectangle, or other figure as the case may be; but every part of thepunch should meet its counterpart or the bolster in lateral contact,the same as formerly…

Metal-work · Electrometallurgy · Metallurgy

Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.

More pictures from 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 ...

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