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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 (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 218

An illustration from 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, 1883, leaf 218
Fig. 243 … ■fe 207.) It DRAWING GEAR WHEELS. 207 Figure 243 represents 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 lineof…

Mechanical drawing

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