Notes and examples in mechanics; with an appendix on the graphical statics of mechanism; (1903)
Church, Irving P. (Irving Porter), 1851-1931 · New York, J. Wiley & sons; [etc., etc.] · leaf 114
thout acceleration, the rope un-winding from a drum of 1 ft.radius. On the shaft of the drumis keyed a pulley of 2 ft. radius,the friction on whose rim, due toits rubbing under the encirclingstationary strap, can be varied inamount by a force P exerted onthe lever AB. It is required tocompute a… … Fig. 120. 106 NOTES AND EXAMPLES IN MECHANICS. The strap covers three quarters of the pulley-rim (i.e., n = |;r).See figure for other dimensions. If Q sinks without acceleration, the tension in the verticalpart of the rope must be 600 lbs., and the rotation of pulley beuniform ; hence moments must…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-495-285.webp)
