Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 42
, Square Thread, 2 ThreadsPer Inch. Fig. 29 Shows the Method of Construction. 18. Construction of an Acme Thread.—Square threadsare not always easily cut, and there has been developed astandard, which is flat at top and bottom and has itssides inclined at an angle of 14)^° to the center line of… … Fig. 29. of an Acme thread as in Fig. 31 may be drawn with theuse of a protractor or as shown in the figure whichis drawn as follows:
Mechanics, Applied
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