pantograph

Scheiner suggested and planned the optical experiment which bears his name, and also invented the pantograph.

The pantograph was tracing Weaver's eyelids, and then the unfeeling eyes themselves.

By moving a pantograph control, Tom was able to manipulate the claws like a hand with fingers.

The pantograph, the pendulum, the brumbo pulley, the reducing wheel.

Sylvester called an instrument based on this property a plagiograph or a skew pantograph.