Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 254
Fig. 280. Construction of the Helix The bill of material includes standard parts such as bolts andscrews which are not detailed on the drawings. A simple bill ofmaterial is shown in Fig. 279. ADVANCED DRAWING 249 Screw Threads. The curve of the screw thread is the helix.It is generated by a point… … ^P^ ^lh
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
