A pantograph (from Greek παντ- ´all, every´, and γραφ- ´to write´, from their original use for copying writing) is a mechanical linkage connected in a manner based on ...
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parallelograms so that the movement of one pen, in tracing an image, produces identical movements in 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.
