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 305
horizontal rectangular rod b, is fit-ted with a socket, so that it may befixed at any height, or in* any angularposition, by the set-screw e. Upon bslides a socket, which is fixed at alldistances from a, by its set-screw d;and lastly, this socket has a long verticalscrew e, by which the brace is… … EXPANDING BRACES. LEVER DRILL. 301 loosened, and the brace is put in position for work. The perpendi-cularity of the brace is then examined with a plumb-line, applied intwo positions, (the eye being first directed as it were along the northand south line, and then along the east and west,) after…
Metal-work · Electrometallurgy · Metallurgy
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