Elevator

An elevator, also known as a lift, is a compartment that moves vertically within a shaft to transport passengers or freight between different levels of a building. Modern elevators are typically powered by electric motors, with a key component being the counterweight. The electric motor maintains equilibrium through a system of cables and pulleys that connect the compartment to the counterweight. Elevators have become essential as buildings have grown taller. The practice of lifting loads by mechanical means dates back to Roman times. The main principle, which relies on balancing the weight of the car and counterweight, has remained consistent, though the methods of maintaining this balance have evolved. The advent of electricity introduced push-button controls and allowed power to be applied to the pulley system at the top of the shaft. Modern elevators are available in various types, each designed for specific purposes.