Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 121
ide to the other, the freehand cur\-egives the projection of the contour of the surface of revolution generated, namely,the hyperboloid of revolution. The helicoid. or surface of revolution generated by a straight line movingso that any point in it travels in a helicoidal line or helLx, as a… … Fig. iio. In projecting screw-threads, the curved edge lines of the threads are thepaths of points in the generating lines of hehcoids, and may be thought of as lines SURFACES OF REVOLUTION, AND THE SCREW THREAD 113 drawn on the surfaces of cylinders or drums. The development of such a cylin-drical…
Geometry, Descriptive
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