A course in mechanical drawing for evening schools and self-instruction (1896)
Rouillion, Louis · Boston, New York, The Prang educational company · leaf 47
\ 13 iiV 7 HI 5- 3i 3* 916 12 li 7 2 4i 3A 3i f 11 u 7 2i 4i 3i 3i H II lA 6 2t\ 4i 3t 3 1 ID •1 6 2| 4 4 3 The standard thread in the United States is knownas the Sellers thread. The angle of this thread is6o degrees. One-eighth of the top of the thread istaken off and an equal amount added to the… … FIG. 3. 40 COURSE IN MECHANICAL DRAWING. SHEET XIV. Screw Threads. At the upper left-hand corner of the sheet is shownthe method of obtaining the curve of a screw thread.Divide one-half the circle into any number of equalparts and divide one-lialf the pitcli A H into thesame number of equal parts,…
Mechanical drawing
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