Elevators

ELEVATORS

Marina Guzmán Cordero1ºB

ELEVATORS

An elevator is a type of vertical trsport equipment that efficiently moves people or goods between floors (levels, decks) of a building, vessels, or other structure. Elevators are generally powered by electric motors that either drive traction cables or counterweight systems like a hoist, or pump hydraulic fluid raise a cylindrical piston like a jack.

INVENTOR

In 1823, in London, Burton and Homer builded the Fourth upword, which allowed to raise 20 people at a heigh of 37 meters. However, this system wasn’t entirely sure until 1853, when Elisha Graves Otis invented an emergency brakes for elevators. Whose demostration was an success.

EVOLUTION

Primitive elevators were used since the third century BC, running by power generated by humans, animals or water.From the mid-nineteenth century, the elevators used with the power of steam were used often for the transportation of materials in factories and mines.

In 1846, Sir William Armstrong introduced the hydraulic crane and in the early 1870s hydraulic machines began to replace the steam powered elevator. The hydraulic elevator worked with a heavy piston, moving in a cylinder, and taking the pressure produced by water or oil pumps.

In 1887 an electric elevator operating with an electric motor that powered a rotating drum on which the hoisting rope coiled constructed.

The first elevator in the world for passenger was installed in a department store in New York. This elevator moved steam and it ascender 5 floors in a minute. A few years later, was building the first skycraper.as the years pass, elevators are more modernized.

ELEMENTS OF AN ELEVATOR

-Car

-Counterweight

-Tractor group in the dynamic-electro elevators

-Parachute system

-Control manoeuvre

ELEVATORS IN THE FUTURE

The elevators of the future will have to rise higher and higher as the skycaper ever constructed higher and more energy is used to transport people. That requires many technological advancements. For now, the best model is the magnetic elevator, which doesn’t work with cables.

http://www.ascensores.ws/informacion/ascensores-del-futuro.html

For more information about elevators:

http://www.youtube.com/watch?v=rNA5nRbFBeI

This is a video about the design of the future elevtors. It is very interesting.

http://en.wikipedia.org/wiki/Elevator