A linkage invented in 1630 by Christoph Scheiner for making a scaled copy of a given figure. The linkage is pivoted at 
; hinges are denoted 
. By placing a pencil
at 
(or 
), a dilated image is obtained
at 
(or 
).
Pantograph
See also
Homothetic, LinkageExplore with Wolfram|Alpha
References
Cundy, H. and Rollett, A. Mathematical Models, 3rd ed. Stradbroke, England: Tarquin Pub., pp. 232-233, 1989.Coxeter, H. S. M. Introduction to Geometry, 2nd ed. New York: Wiley, pp. 69-70, 1969.Durell, C. V. Modern Geometry: The Straight Line and Circle. London: Macmillan, p. 5, 1928.Wells, D. The Penguin Dictionary of Curious and Interesting Geometry. London: Penguin, pp. 167-168, 1991.Referenced on Wolfram|Alpha
PantographCite this as:
Weisstein, Eric W. "Pantograph." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Pantograph.html