s pinions. Wheels are cut in two ways, on automatic wheel cuttersas just described and on engines containing parallel spindlesfor the cutters, carried in a yoke which rises and falls, sothat it clears the work while the carriage is returning tothe starting point on each trip and engages it on the… … Fig. 81. Automatic Wheel and Pinion Cutters. driven by a rack and pinion operated by a crank in thehands of the workman and streams of soda water are usedon the cutters and work to carry away the heat, as brassexpands rapidly under heat, and if the stack were cut dry THE MODERN CLOCK. 255 the cut…
Clocks and watches
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