. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ace of tlicnut being cam-shaped, to correspond with the cam-sliaped washer underneath it. In tighten-ing, the somewhat abrupt faces of ttie cams take up the slack motion Viy a slight movementof the handle, when the nut and thread bind the tail-stock rigidly. Similarly, in looseningthe tail-stock tlie abrupt angle of the cams gives tlie necessary freedom with the same smallamount of motion. Tlie back-rest has a lever
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ace of tlicnut being cam-shaped, to correspond with the cam-sliaped washer underneath it. In tighten-ing, the somewhat abrupt faces of ttie cams take up the slack motion Viy a slight movementof the handle, when the nut and thread bind the tail-stock rigidly. Similarly, in looseningthe tail-stock tlie abrupt angle of the cams gives tlie necessary freedom with the same smallamount of motion. Tlie back-rest has a lever-hamlle lock-nut. Fig. 0 is a pi-rspectivc view of a 14-in. swing-lathe of this ty])e. Car-W/ipel Ldl/tr.— Vifr, 7 illustrates a car-wheel lathe built by the Niles Tool Works, ofHamilton. ()., es|iecially designed for turning steel-tired car and truck wheels on their problem presented in tiiis case is to grip the axles l)y their journals, keep them in line LATHES, METAL-WORKING. 461 with each other, and revolve them about their common centers, whether these should be truewith the original centers of the axle or not. This is accomplished in the following manner :. Fig. 1-6.—Putnam engine lathe and details. The lathe is arranged with two face-plates revolving on hubs projecting from each headturned true and placed in exact alignment. Within these face-plates and revolving wiiJithem are placed two very strong, self-centering chucks, with four swivel jaws. They areoperated by gearing mounted on each head-block. These grip the axle firmly about thecenters of the journals, and with the face-plates revolve them in exact line. The two face-plates aie geared together in the same manner as on driving-wheel lathes, by a heavy forgedsteel shaft. The chucks above mentioned are used only to center the work and insure thewheels being turned true with the journals. The wheels are revolved by two drivers on eachface-plate, which engage with the heads of the bolts used to s
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
