Endless Screw

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“The threads of the screw act upon the teeth cut into the wheel. As the screw turns, each thread catches a tooth on the wheel to rotate the wheel indefinitely.” —Quackenbos 1859




G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 117


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