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Mechanical drawing for secondary schools (1916)

Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 258

An illustration from Mechanical drawing for secondary schools, 1916, leaf 258
to the figures in rendering theconvention. The United States Standard (U. S. S.) or Sellers thread,Fig. 281, differs from the sharp V-thread in that the outer andinner edges of the thread are flattened. The same conventionis used for representing it that is used for the sharp V-thread. ADVANCED… … Fig. 285. Square Thread. Edges Drawn as Helices For small sizes, the method shown in Fig. 287 is generallyused because of its simplicity. The Acme screw thread is rep-resented conventionally as shown in Fig. 288. It is convenientin drawing to make the angle between the faces of the thread30°…

Mechanical drawing

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