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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 (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 154

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, 1883, leaf 154
., for the full length the thread is to bemarked. Wiih the triangle resting against the X-s(|uare, the lines 7, S, 9, etc. (for die full length of thethrcMcl), arc ch-awn from the points 4, 5, 6, on line 2.Tlu.se give one side of the tliread. Reversing the(h-aVvinir trianLile angles 10, 11, etc.,… … passes set on the centre line transfer this depth to theother side of the bolt, as denoted by the arcs 13 and14. Touching- arc 14 we mark line 15 for the thread 154 MECHANICAL DRAWING SELF-TAUGHT. depth on that side. We have now to get the slant ofthe thread across the bolt. It is obvious that…

Mechanical drawing

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