Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 292
n. Wherever, fromany cause, the alignment can not be very nearly accurate, some coupling thatadmits of lateral movementshould be adopted. Thesimplest of these is the boxor sleeve coupling (Fig.604), sliding over the endof two square shafts, keyedto neither, sometimes heldin place by a pin… … Fig. 605.
Mechanical drawing
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