Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 283
Fig. 569. Fig. 570. 266 MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. couplings, which are in use in their own shops and have been extensively copiedby others. Some of the distinctive forms are further illustrated. … Fig. 572. Figs. 579 and 580 are the front and side elevations of a pillow-block, onehalf of each being in section. The length of the box is about four diameters
Mechanical drawing
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