History Of The Elevator

Elevators started out as crude rope or chain pulled hoists driven by people power. An elevator is by definition an enclosed platform that can be raised and lowered inside a vertical shaft and used to move people and freight up and down between floors of a building. Modern elevators are made up of a car or “cab” resting on a platform that acts as the floor of the enclosed car. Earlier elevators were driven by mechanical systems that were powered by either steam or hydraulic pistons. These mechanical systems replaced the original “traction” elevator systems that were simple platforms hoisted by hand-pulled ropes on pulleys. Moving a heavy car filled with people or freight requires a lot of power unless that weight is counter balanced. To make this happen a modern elevator system works by having the total weight of the car is balanced by a counterweight. In this way, the mechanism requires a lot less energy to get it started. The counterweight also causes the system to work more smoothly. In some systems elevators are conntected together so that they can move synchronously in the opposite direction. In this way they can act as a counterweight for each other. One kind of elevator works without a shaft as it climbs other structures. These self-ascending elevators provide their own propulsion. The propulsion system on this kind of elevators can be provided by electricity or an internal combustion engine. These climbing elevators are used to transport people and equipment high up to the tops of towers, masts, or other high structures. More info: elevator ct

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