pantograph

thumb|Drafting pantograph in use thumb|Pantograph used for scaling a picture. The red shape is traced and enlarged. thumb|Pantograph 3d rendering

A pantograph (, from its original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen or stylus, in tracing an image, produces mimic movements recorded by a second pen. If a line drawing is traced by the first point, an identical, enlarged, or miniaturized copy will be drawn by a pen fixed to the other. Using the same principle, different kinds of pantographs are used for other forms of duplication in areas such as sculpting, minting, engraving, and milling.