Escalator
device · 1896 · Electric age
A moving staircase.
Inventor: Jesse W. Reno.
What it is made of
- Roller chain — has part. A chain pulls the steps.
- Electric motor — has part. The drive is an electric motor.
Principles and materials it uses
- Steel — is made of. The steps and truss are steel.
Things built in a similar way
- Conveyor belt — works like. An escalator is a conveyor with steps.