Roller skates
device · 1760 · Industrial Revolution
Shoes on wheels.
Inventor: John Joseph Merlin.
What it is made of
- Ball bearing — has part. Bearings.
- Wheel — has part. Little wheels.
Principles and materials it uses
- Wood — is made of. The wheels of the first roller skates were wooden.
- Iron — is made of. On an iron frame.
History: what it evolved from and what it influenced
- Ice skates — evolved from. Skates for dry land.