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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 (1889)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 224

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, 1889, leaf 224
Fig. 249. (Page 209.) DRAWING GEAR WHEELS. 209 may be represented by simple circles in a side viewand byline shading In an edge view; thus It wouldanswer every practical purpose If such small wheels … Fig, 246. as in Figures 246 and 247 at D, F, G, K, P, H, I andJ, were drawn as shown. The pitch circles, how-ever, are usually drawn In red ink to distinguishthem. —^ /a= Fig. 247. In Figure 248 is an example in which part of thegear is shown with teeth in, and the remainder is Illus-trated by…

Mechanical drawing

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