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News about elevators

Service lift. History of creation

To date, conventional stationary elevators are used to transport passengers and goods between floors. Elevators for the transport of passengers should transport about 30 people, and special mine lifts take for more than a hundred passengers at a time. A simple elevator is capable of moving silently and delivering cargo at speeds up to 4 m / s. A high-speed passenger elevator can reach a speed of 17 m / s. The current freight elevators move loads up to 10 tons between the floors and do this at a speed of 1.5 m / s. In our time, home elevators are considered necessary to create a comfort device. Now it is difficult to even imagine that a multi-storey building functioned without an elevator. Members of modern society daily use elevators - both passenger and freight, but at the same time little knows how the freight elevator appeared. And the story of his origin is quite curious.

history otis

Someone is inclined to think that the semblance of the elevator known to us appeared in the 17th century in France, but in fact, the unit whose successor is the modern freight elevator, appeared a century later in America. Of course, Elisha Graves Otis, who lived at that time in America and who then worked on various construction sites and worked in a sawmill, deserved the elevator creator. When Otis was busy making beds in one of the furniture factories, it turned out that he had to develop a device capable of transporting to the upper floor of the sawing shop on the instructions of the management.

Otisu task seemed very unusual, but he coped with the challenge.

In less than a year, Otis presented his first serious invention to the world: a cargo elevator with a safety emergency system capable of slowing down the elevator car in case of a cable break. It was really the first freight elevator that was safe to use.

Subsequently, Otis founded a small company for the production and installation of freight elevators and elevators for people, which, as we all know, has become well known in a short time. And in 1854, Otis organized an unusually effective campaign in New York, which attracted a lot of new customers. In one exhibition hall with high ceilings, a cargo lift was installed for this case, which operated between supports at a 12-meter height. At the peak point of the construction was a man holding a real sword in his hands. On the platform of the freight elevator, among the construction sacks and boxes, Otis personally was in a dress suit and an elegant hat. Immediately after the elevator climbed to the very top, at the signal of Otis, the assistant with the sword chopped the rope, after which the platform began to fall down. However, after a meter or two, the protective braking mechanism worked and the platform froze in the air. After such an impressive spectacle, Otis cute bowed to the shocked audience, removing his elegant hat. It is not difficult to imagine how an unusual resonance provoked, then shown experiment.

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