- Inventor: Elish Otis
- Year: 1852.
- Why did he invent the elevator?
In 1851 Waterman invented a forklift and Otis, inspired by that invention, created an elevator with a toothed system, which muffled the fall in case the cable of sustenance broke.
It improves the accessibility of elder and disabled people to their houses.
It increases the value of the housing.
It increases the maintenance costs.
Its installation is very expensive.
The movement of the elevator and the opening of the door produces noises.
Naiara Suarez & Sara Escudero