Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 305
main shaft is connected directly with a machine, and it has to bethrown out, the belt is often slipped from the pulley (Fig. 641), and hangsloosely from the shaft, by which the belt is worn and often becomes entangled 288 MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. with the shaft or with… … Fig. 641. Motion may be transmitted by belts to shafts at right angles to each other. Figs. 642 and 643 is a plan and elevation in which A is the driving-shaftand pulley and B the driven one, at right angles to each other. The arrowsshow the advancing sides of the belts and their position with…
Mechanical drawing
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![An illustration from M. Vitrvvii viri svae professionis pertissimi De architectvra libri decem, ad Avgvstum Cæsarem accuratiss. conscripsit & nvnc primvm in Germania qva potuit diligentia excusi, atq[ue] hinc inde schematibus non iniucundis exornati (1543)](https://img.insideoutlibrary.com/img/200/ia-mvitrvviivirisva00vitr-285-95.webp)
