A course in mechanical drawing for evening schools and self-instruction (1896)
Rouillion, Louis · Boston, New York, The Prang educational company · leaf 51
ANICAL DRA WING. SHEET XV. Springs. This sheet shows conventional methods of repre-senting springs. The spring at tlie left may be con-sidered as a square-threaded screw from which thebody has been removed. The curves, except at theends, are shown as straight lines. The two springs at the right are… … 44 COURSE IN MECHANICAL DRAWING. SHEET XVF. Standard Bolts and Nuts. This sheet is designed to show the proportions ofstandard bolts and nuts. The diameter of the boU isthe unit from which the various proportions are de-rived. In the drawing, the diameter of each of tliebolts is taken as one inch.…
Mechanical drawing
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