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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 259

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 259
sses at S, draw the arc H H. The arcs K i and K2 are drawn from the centre X, with a radius of lo^^for K I and 7J^ inches for K 2, and only serve m a 244 MECHANICAL DRAWING SELF-TAUGHT, half stroke cam to intersect the curved lines alreadydrawn, as shown in Figure 275. In practice, the sharpcorner… … Fig. 278. the cam of this limit (3^ stroke) is correctly drawnby the process described with reference to Figure 275,the outline of the cam so constructed being- shown inFigure 276. In Figure 278 is shown a cam designed to cut offthe steam at five-eighths of the piston stroke, the con- PLOTTING…

Mechanical drawing

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