Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 93
ion to be operated uponby the first frog c, which thenthi-ows this new tooth forwardin [)osition to be acted uponby the second frog D, whii-.h,continuing the motion of thewheel, rotation will be carriedon ud infinitum^ as long as thedrill-stock is reciprocated.The same effect will be produced upon… … Items and Novelties. 77 same time, be observed that in all other positions, except where thetaiiiing does occur, the wheel, and consequently the drill-stoclc,are lirinly held from turning by the teeth of the wheel locking onthe straight part of the frogs. The relative position of these frogs, in…
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