There are no buttons to press. Instead, an elevator operator sits on a small stool and uses a lever to shift the metal box up and down. It's a manually operated elevator, among the last of its kind in Chicago.Elevator, also called lift, car that moves in a vertical shaft to carry passengers or freight between the levels of a multistory building. Most modern elevators are propelled by electric motors, with the aid of a counterweight, through a system of cables and sheaves (pulleys).
if you are interested, please fill the below details: