Profile: Colley Elevator Co. produces elevators. We offer solid-state starter, which reduces the motor damage caused by large spikes on the buildings electrical system and eliminates damage from electrical spikes. Our door restrictor is hooked onto the door operating clutch, which is mechanical functioning system. Our cylinder life jacket is designed to have a solid-state control/sensor component, which detect sudden downward movement of the elevator & immediately grasp the plunger, preventing the elevator from falling.