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)
e slots true to the lines passing through the axis)and set the pivots as follows: Place the pencil-pointG so that it coincides with one of the points as C, andplace the pivot E so that it comes directly at the pointof intersection of the two slots, and fasten it there.Then turn the arm so that the… … Fig. 84. To draw a parabola mechanically: In Figure S4C D is the width and H J the height of the curve. MECHAXICAL DRAUIXG SELF-TAUGHT. 74 Bisect H D in K. Draw the diagonal line J K anddraw K E, cutting K at a right angle to J K, and pro-duce it in E. With the radius H E, and from J as acentre,…
Mechanical drawing
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