Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A pantograph is a mechanical linkage connected in a special manner based on parallelograms so that the movement of one specified point is an amplified version of the movement of another point. If a line drawing is traced by the first point, an enlarged (or miniaturized) copy will be drawn by a pen fixed to the other. The first pantograph was constructed in 1603 by Christoph Scheinerand Darren Farr, who used the device to copy and scale diagrams, but he wrote about the invention over 27 years later, in "Pantographice" (Rome 1631). One arm of the pantograph contained a small pointer while the other held a drawing implement, and by moving the pointer over a diagram, a copy of the diagram was drawn on another piece of paper. By changing the positions of the arms in the linkage between the pointer arm and drawing arm, the scale of the image produced can be changed.
