👉 In physics and engineering, a turngate is a device used in rotating or turning machines. It is typically made of a circular metal plate with a hole cut out for the axis to rotate around. The plate can be rotated so that the angular position of the plate changes, which results in a change in the direction of rotation of the machine. This mechanism was first introduced by James Clerk Maxwell in 1895 and has since become an integral part of many industrial processes.