Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 884
last degree, and deficient in stability, is easily twisted out of position in consequence of the obliqueaction of the weight upon it; and, moreover, the hook into which the brasses are fitted being usuallynarrow—another feature of economy always associated with it—the brasses soon become loose… … Fig. 2112 represents a gallows of a more substantial character, but still inelegant in appearance, and,in some respects, inconvenient. The weight being equally and directly borne by the two supportingpoints, it possesses all the advantages of strength; it may be provided with a cover and cover…
Mechanical engineering
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