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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 290

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 290
3-1416= the area of E.Figure 301. In order to afford a firmer hand grip than is af-forded by the shape of wheel shown in Figurethe form shown in Figure 303 is often employed, EXAMPLES FOR PRACTICE. 275 the one view affording all the information required,since upon it all the dimensions can be… … Fig. 302. The saw driving-wheel D has wrought-iron armsscrewed into the wheel hub. The wooden segmentsaround the wheel have their grain lengthways, andbetween them are placed pieces of soft wood withthe grain across the rim. This acts to keep the 2~6 MECHANICAL DRAWING SELF-TAUGHT. joints tight,…

Mechanical drawing

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