Kenison, Ervin, Gardner, Harry W, Lawrence, William Henry, 1868-, Everett, Herbert E. (Herbert Edward), 1863-1932, Gregg, D. A. (David A.), Von Holst, H. V. (Hermann Valentin), 1874-1955, Brown, Frank Chouteau, 1876-1947, Griffin, Charles Lewis, 1867-, Neubecker, William, 1864-, Zapf, Alfred E, American School (Lansing, Ill.) · Chicago, Ill. : [American School of Correspondence] · leaf 81
shown in Fig. 15., except that straight lines are used instead of curves. Square threads are almost always represented as in Fig. 25, and Y threads of coarse pitch and large diameter are shown as in Fig. 23 or 24, but when we have a screw of small diameter and fine pitch, such a method would become… … parallel to A E. Halfway between Fig. 25. the lines A E and F G, the shorter and heavier lines are drawn, the distance from AB and C D to the ends of the heavy lines being a little less than A F. To have these lines of uniform length it is well to draw light pencil lines, as a guide for stopping…
Mechanical drawing
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