The watchmakers' lathe, its use and abuse; a story of the lathe in its various forms, past and present, its construction and proper uses (1903)
Goodrich, Ward L. [from old catalog] · Chicago, Hazlitt & Walker · leaf 253
he first to apply ball bearings to the foot wheel, 252 THE AMERICAN LATHE. but made the mistake of selecting a 60-pound wheel for hisexperiment. He exhibited the new wheel to the trade, and itmet with the objection that it. ran too easily, so that itcould not be stopped properly. He, therefore,… … Fig. 224. Purdy Wheel with Double Pendulum, About 1898, Frederick Purdy invented a swing treadlefoot wheel, with bicycle spokes (to get all the weight inthe rim) and two pendulums, carrying the crank race be-tween them. This kept the race perpendicular and gave theswing treadle an even motion, but…
Clocks and watches · Lathes
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