Elementary mechanical drawing, for school and shop (1886)
Aborn, Frank, 1845- [from old catalog] · Cincinnati, New York, Van Antwerp, Bragg & co · leaf 103
ng for a left-hand Y thread screw 4 in. in diameter, 3 in. long;angle of thread 87J°, andpitch 1J in. Section V. — RectangularHelical Projections. Prob. 1.—Make a con-structive drawing for aright-hand, rectangular,helical projection 1J in.in diameter, If in. pitch,and i in. square, on acylinder If… … 102 MECHANICAL DRAWING. abed and efg, that show at the upper and lowersides of the helical projection. Draw the exposedparts of the cylinder, and the conditions of theproblem are completely satisfied. Note.—The helical projection described in Fig. 126 is calleda square thread. Prob. 2.—Make a…
Mechanical drawing
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