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 69
AUGERS. … quired to be applied to the machine, by which the rod is twisted in the helical curve. The next operationis to °-ive the requisite degree of uniformity to the size and spread of the twist, which is accomplished byhammering in the machine, consisting of a trip-hammer, arranged and operated over a…
Mechanical engineering · Mechanics · Engineering
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