Pantographs are used for reducing or enlarging engineering drawings and maps and for guiding cutting tools over complex paths. Artists specializing in miniatures use pantographs to achieve greater detail.

How the pantograph works and how it is able to produce an enlarged image?

It's based on parallelograms so that when moving one specified point, called the tracing stylus, along the outline of an image, an enlarged or reduced version of the image is created by the movement of another point, called the drawing stylus, which has a lead affixed to it.

Why pantograph is used in trains?

Abstract: In the power supply system of an electrified railway, a pantograph in contact with the overhead train line is used to send electricity to the main transformer of the electric train, thus providing power.