Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 573
for actuating feed,independent of the tappets on the carriage, which arc employed to shift the belts only; 3. Narrowdriving-belts moving at a high speed to facilitate shifting or removing the carriage movement; 4.The arrangement of the gearing in machines having what is called rack movement, so… … PLANING MACHINES, METAL. 549 conspicuous exception. The gearing, and indeed all parts, have been increased in strength, and theracks and all wheels are in most cases cut. The advantage of two belts instead of one lies in thefact that the extra belt for running back is driven at double the speed of…
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