Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 380
hes.F pounds is exerted at li, raising the weight AV.Tlie following equation holds true, F Distance W movesW JJistanee b moves A fui <,f 7> Su])pose the screw to be turned once; then F will movethrough a distance approximately eipial to the circumference of acircle whose radius is A; that is,… … W 2 TT A 2 TT A F = W X P WxP=2 7rAxF From this equation, if anythree of the quantities F, AV.P or A are known, the fourthmay be found. P and A mustboth be expressed in feet orboth in inches. ^o- 31. For example, let P ^ i inch, A = 5 feet, F = 100 pounds.Substituting in the formule we get 100 .25…
Mechanical engineering -- Dictionaries
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