Pantograph
A pantograph is a machine. It is used in drawing or planning. It makes it easy to copy diagrams.
The device that an electric train uses to get its electricity is also called a pantograph, because it looks a bit like the drawing instrument.
Pantograph Media
Drafting pantograph in use
Pantograph used for scaling a picture. The red shape is traced and enlarged.
3D rendering of pantograph tracing a photo of a vase. Created by Joseph Lertola 1/13/2016
Diagram illustrating the principles used by William Wallace's eidograph
A small pantograph milling machine.
Detail of the table of a larger pantograph milling machine.
Adjustable mirror using pantograph extension arm.
Talhoffer's extending blade 
Old time Pantograph etching mechanism
