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 282
PRESSES. 277 steel, or even cut it through. Accordingly there is introducedbetween the head of the press and the lever an adjustable ring,which acts as a stop, and only allows the punches to descend to onedefinite distance, until in fact the ring is pinched between the pressand lever. The screw of… … extremity a, is joined to the upper part of the press, and c, to thetop of the follower. When the parts a, b, and b, c, are inclined ata small angle, the extremities a, and c, are brought closer together,and raise the follower, but when the two levers are straightened, aand c separate with a minute…
Metal-work · Electrometallurgy · Metallurgy
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