A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 372
Fig. 1.55. THE SCREW^. 942. A screw is a cylinder with aspiral groove windingaround its circumfer-ence. This spiral iscalled the thread ofthe screw. The dis-tance that the threadis drawn back or ad-vanced in one turn ofthe screw is called thepitch of the screw.The screw in Fig. 155 is turned in…
Electrical engineering · Mechanical engineering
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