Automatic Elevator Doors

Automatic elevator means a passenger or freight lift operated by push buttons so that the starting, moving, leveling, holding and opening and closing of the doors is entirely automatic. The doors on the cars are operated by an electric motor, which is hooked up to the elevator controller. The electric motor turns a wheel, which is attached to a long metal arm. The metal arm is linked to another arm, which is attached to the door. The door can slide back and forth on a metal rail.