Motion of Open Curves Small 320×189 Medium 640×378 Large 1024×605 Download Tiff Original 2400×1419 | (225.8 KB) Description "Since these curves are not closed, one pair cannot be used for continuous motion; but a pair of such curves may be well adapted to sectional wheels requiring a varying angular velocity." This figure shows an example of the process. Keywords logarithmic spirals, motion, motions, open curves, plane, rolling spirals, rolling surface, rotation, spiral, surfaces, Translation Galleries Analytical Geometry Source: Peter Schwamb, S.B. And Allyne L. Merrill, S.B. Elements of Mechanism (New York, NY: John Wiley & Sons, Inc., 1904)
