Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)
sents a drawing of one-half of abevil gear, and an edge view projected from the same.The point E corresponds to point E in Figure 241, orW in 242. The Hne F shows that the top surface of theteeth points to E. Line G shows that the pitch Hneof each tooth points to E, and Hnes H show that thebottom… … Fig. 244. thus J is thicker and deeper than end K of the tooth.Lines F G, representing the top and bottom of a toothin Figure 243, obviously correspond to dotted lines/in Figure 242. The outer and inner ends of the teethin the edge view are projected from the outer andinner ends in the face view,…
Mechanical drawing
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