Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 264
254. The tool,which might be, and sometimes is, a planing tool as shown atthe top of the illustration but which, in the vast majority ofcases, is a rotary milling cutter as shown at the bottom of theillustration, is accurately formed to the desired profile which itreproduces in the gear. It was for… … 254 METHODS OF MACHINE SHOP WORK The first to perform their functions automatically, requiring noattention on the part of the operator except to remove a com-pleted gear and supply its place with a fresh blank were made byWilliam Sellers and Company in 1866, some of the machines thenmade being…
Machine-shop practice
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