The brassfounder's manual : instructions for the modelling, pattern-making, moulding, alloying, turning, filing, burnishing, bronzing, etc., etc. ... (1879)
Graham, Walter · London : Crosby Lockwood and Co. · leaf 60
THE BRASSFOUNDER's MANUAL. 46 and fro, so as to form tlie thread. The general form of sucK Dombs is here shown. … Fig. 22.— Screw Combs. Traversing mandrils are also in use for making screws. In this case the work moves, and the tool is fixed. Screws are also formed by stocks and dies, and with the screw-plate ; but for many purposes the ordinary screwing machines and screw-cutting lathes are found of great…
Brass founders
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
