Fairbairn, William, Sir, 1789-1874 · London, Longman, Green, Longman, Roberts & Green · leaf 66
The Worm and Wheel. By this contrivance the motion of a screw is communicatedwith great smoothness to oblique teeth on a spur wheel. The section of a screw through its axis is precisely similar tothat of a double rack. Let A b be such a section, and forsimplicity suppose that the form of the… … Then the teeth of the wheel c d e may evidently be formed soas to work with the centre section of the screw. Now the effectof the revolution of the screw is precisely similar to that of theracks, and the sections of the threads of the screw will appearto travel from end to end, in the same way as a…
Mills and mill-work · Machinery
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