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)
roke. For the backward stroke we draw thedotted line from position 17 up to arc H, and with thecompasses at i 7 mark a line beneath the line M ofmotion, pursuing the same course for all the otherI)In motions, as 18, 19, etc., until die pin arrives againat position 24, and the link at O, and has… … Fig. 286. Figures 286 and 287 represent the WHiitwortli quickreturn motion that is employed In many machines. Frepresents a frame supporting a fixed journal, B, on i^C 254 MECHANICAL DRAWING SELF-TAUGHT. which revolves a gear-wheel, G, operated by a pinion,P. At A is an arm having journal bearing…
Mechanical drawing
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