Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 655
ber of arms. It frequently happens that certain forged, cast, and other works have parts, known as bosses, swells,collars, and knuckles, that are pierced with holes, which require their fiat surfaces and also their margins to be made partially or entirely concentric with the holes. When such parts… … When the circular margins are discontinuous, files and templets are more or less required: thus theextremity of a forged arm, such as Fig. 1691, is drilled, and in the configuration of the remaining parts,if but one or two such pieces are to be made, a boss or plug of wood is turned like a, that…
Mechanical engineering · Mechanics · Engineering
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