Activites

Activity One

Invention: Safety Elevator (Brake)
The world's first safety brake for Elevators was invented in 1852 by Elisha Graves Otis in New York, USA. After she successfully demonstrated in 1854, the effectiveness of the elevator brake, the confidence in the seurity of elevators grew. That confidence facilitiated the construction of buildings of 4 or more stories. After that, cities grew upward instead of outward. As you can see, Most of the American cities of today are full of skyscrapers thanks to this invention.



Bibliography:

• WikiAnswers
• ideafinder.com/history/inventions/elevator.htm
• The Industrial Revolution in the Eighteenth Century: An Outline of the Beginnings of the Modern Factory System in England (Book)

Poster:The safety brake for elevators.