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简体中文If you've ever been in a large building with a Passenger Elevator, you've probably noticed that it's a common sight. However, you may not realize how many different functions it has. Listed below are just a few of them. Listed below are some examples of how they work. And remember, if you don't see one, you can always make a request for one.
This type of passenger elevator has additional sets of doors to serve different floor plans. For example, it's common to see two sets of doors: one for the street level, the other for the crosswalk. Additionally, they can be timed to increase the speed of boarding and exiting. These features are particularly useful for passengers with luggage. Unfortunately, they do reduce the overall maneuverability of the elevator. Therefore, the next time you need to use one, remember to take the time to research your options.
Passenger elevators have many safety features. They can be equipped with an elevator telephone that lets passengers call for help in an emergency. The telephone can be either a transceiver or a button that delays the timer for the elevator doors to close. Another safety feature of an elevator telephone is the call cancellation feature. By pressing this button, you can easily deselect a floor or a particular floor. These features are often required by local regulations.
The first passenger elevator was built in New York City by Elisha Otis. He performed the first public demonstration of the elevator at the 1854 world's fair in New York City. He showed off the elevator by cutting a cable with an ax and catching it on a rack. A clever safety mechanism halted the falling car, and a ratchet in the elevator's shaft stopped it from going down.
When it was first introduced, elevators weren't much more than tourist attractions. Most buildings were only three or four stories high, and people would want to live on the lower floors because they were easier to access and didn't involve a lot of stairs. But as the popularity of elevators increased, they also changed the world of buildings. And as skyscrapers were built, so did the social landscape of the modern city.
Historically, many elevators used ropes to control floor positioning. This was common in older freight elevators, and most elevators built before WWII had manual control. Operators would move counterweights to manipulate the lift and control the elevator's speed. Most elevators today use geared hydraulic chains and counterweights. These elevators are much more energy-efficient than geared systems, and they tend to have smoother rides.
