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)
stroke. For the backward stroke we draw thedotted line from position 17 up to arc H, and with thecompasses at 17 mark a line beneath the line M ofmotion, pursuing the same course for all the otherpin motions, as 18, 19, etc., until the pin arrives againat position 24, and the link at O, and has… … Fig. 286. Figures 286 and 287 represent the Whitwortrh quickreturn motion that is employed in many machines. Frepresents a frame supporting a fixed journal, B, on ^54 MECHANICAL DRAWING SELF-TAUGHT. which revolves a gear-wheel, G, operated by a pinion,P. At A is an arm having journal bearing in B…
Mechanical drawing
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