Kempe's translator copies a link to another location. Since the link has constant length, it is given by its starting point and polar angle. So Kempe's translator translates an angle to a new location, keeping the same orientation. The translator is Kempe's simplest tool; the other two are the adder and the multiplicator.
E. D. Demaine and J. O'Rourke, Geometric Folding Algorithms: Linkages, Origami, Polyhedra, New York: Cambridge University Press, 2007 p. 33.
Wolfram Demonstrations Project
Published: August 15 2008