Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 256
nalized into straight lines as shown in Fig. 283. The methodcommonly used for representing screws up to about one inch indiameter, as measured on the drawing, is still further simplifiedby omitting the short inclined lines forming the saw teeth. ADVANCED DRAWING 251 Fig. 284. On the pencil drawing… … Fig. 283. V-Thread. Conventional Eepeesentation for Large Sizes In this course the shorter lines will be made object-line widthand the longer lines center-line width. The angle at which theselines are drawn is estimated. It remains practically constant forall sizes of standard screws as the pitch…
Mechanical drawing
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