Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 192
Fig. 242. of the two are then brought together; the coupling is now slipped backover the joint, and firmly keyed. This is an extremely rigid connection. 11 … Fig. 243. Fig. 244 Fig. 245 is a screw coupling, a very neat and excellent rigid coupling,for the connecting of wrought iron, more especially the lighter kinds. Itwill be observed that this coupling admits of rotation but in one direction, 150 DEAWINa OF MACHINEEY. the one tending to bring the ends…
