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Matt Williams

on 19 October 2012

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Transcript of Elevators

Questions? Elevators History • The first appearance of devices similar to elevators was in the 3rd Century BC
o Powered by humans, animals, or water What we consider elevators were created in the 19th century
o Powered by steam
o Used to lift materials in factories, mines, and warehouses
• Elevators have since changed to be powered by a hydraulic crane, and later, electricity
• In 1852, Elisha Otis invented a safety device that kept the car from falling if a cable broke.
o This helped make skyscrapers a reality
o The brake is still used today
• The first electric elevator was invented in 1880
• In 1887, an electric elevator with automatic doors was patented
• In 1889, the first commercially successful electric elevator was installed The roped and the hydraulic elevator Types of elevators There is a piston mounted on the bottom of the elevator

A pump is attached to the elevator

The pump pumps water into the piston causing the elevator to go up

The water goes back into the pump for the elevator to go down Hydraulic Elevator Elevator is attached to a steel cable and on the other side is a counter weight

At the top of the elevator shaft is a pulley where the cable rests on

Attached to the pulley is a motor that spins it and causes the elevator to go up and down Roped Elevator Conventional Group Control CGC (conventional group control)

Select the floor inside the elevator car

Each passenger could get off at a different floor Destinational Group Control Select the floor when you call the elevator

Results in passengers getting off at the same floor

Equalizes workload among elevators

DGC brings the efficiency of up-peak performance close of the level of down-peak Traffic Performance Comparison Minimizing roundtrip time (RTT) is an obvious goal

Some basic parameters include number of tenets per floor, number of floors to be served, and car capacity Types of Engineering Computer Science: designing the algorithms and interpreting input data

Mechanical: constructing the elevator

Materials Science: material to build stronger, but lighter elevators, better materials for parts, etc.

Civil: Elevators are a part of their project Electrical and Computer: Supplying power to the elevator and the hardware that runs the system.

Construction Engineering and Management: Deciding which type of elevators to use given the project as well as which algorithm they should implement.

Industrial and Systems: Integrating the elevator system which the functions of the building THANK

YOU! http://continuingeducation.construction.com/article.php?L=14&C=220&P=1
Full transcript