Screw Fixed Screw
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“In this, the screw is fixed, while the nut, N, by being turned by the lever, L, from right to left, will advance down the screw.” -Comstock 1850
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ScrewsSource
J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 95
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