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 493
-6-g-Scale— li inch=l foot. … Scale.—li inch=l foot The parallel motion.—Figs. 1381 and 1382 represent the radius bars, and Figs. 1383 and 1884 theparallel bars. The screws at the end of the parallel bars enter holes in the cross-bar shown in Figs.1385 and 1386, and to the exterior bearings of the same cross-bar the radius-bars…
Mechanical engineering
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