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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 253

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 253
Fig. 268.To enable a certain amount of adjustment of the cams 236 MECHANICAL DRAWING SELF-TAUGHT. Upon the collar, the bolts which hold them to the collarfit closely In the holes In the collar, but the cams areprovided with oblong bolt holes as shown, so that theposition of either cam, either with… … Scale li=l footFig. 269. to the extent permitted by the length of the oblongholes. The crank Is assumed in the figures to be on Itsdead centre nc^irest to the engine cylinder, and to rc-vnlxc in the direction of the arrows. The cams are PLOTTING MECHANICAL MOTIONS. 237 SO arranged that their plain…

Mechanical drawing

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