The practical metal-worker's assistant : comprising metallurgic chemistry, 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, Scoffern, Clay, Fairbairn, and others (1872)
Byrne, Oliver · Philadelphia : H.C. Baird · leaf 434
THE PRACTICAL METAL-WORKER’S ASSISTANT. 432 If, as in Fig. 468, the inner curvature of the dies a and b be the same as in the blank cylinder, a will exactly agree both in diame- 467 465 Figs. 463 Large Master Tap. Small Master Tap. Medium Master Tap. Two depths larger than Screw. Same diameter as… … ter and angle at the commencement of the screw, but at the con¬ clusion, or as at b, each will be too great, and the die and screw will be far from counterparts, and therefore ill adapted to each other. The most proper way of solving the difficulty in dies made in two parts, is by having two pairs…
Metal-work · Electrometallurgy · Metallurgy
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
