Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 297
ron disks A engage with solid keys on the long bossof the spur wheel E, within which the driving shaft C turns freely when nocoupling pressure is applied to the disks. The drum D containing the six in-termediate wood disks B slides on feathers on the shaft 0, and the groove G- onthe outer end of…
Mechanical drawing
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