Ever heard of a pantograph?

Before the days of digital scanning and photocopying, I used to use a pantograph to copy and enlarge (or reduce) drawings, artwork and photographs. I still have two in my drawer: a wooden one made in the early 20th Century and a somewhat later plastic one. The problem with the cheaper models is usually that the joints need to move freely and this usually means that there is some play in them which introduces errors into the drawing. The better ones have a holder for a draughtsman's pencil lead or tube type ink pen. They can still be very useful for enlarging or reducing patterns for embroidery and other crafts. A sophisticated and very accurate 3D pantograph mechanism is still used to copy and reduce an artist's bas-relief model to smaller sizes when making coins and medals.