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
at anypoint where motion is transferred to or from it by toothed geer, whose line of contact is in the horizon-tal plane,—a species of block-brass is fitted into it and retained by a cotter, as shown in the figure. Theends of this block are checked, and the back of it has a groove to receive the… … This form of gallows has, however, no other recommendation than cheapness. It is inelegant in thelast 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…
Mechanical engineering
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