Mainspring
part · 1430 · Middle Ages
A spiral spring that stores a clock’s winding energy.
Principles and materials it uses
- Iron — is made of. Mainsprings were made of hardened iron.
Where it is used
- Pocket watch — is part of. The mainspring stores the energy.
- Music box — is part of. A mainspring turns the cylinder.
- Gramophone — is part of. A spring drive.
- Stopwatch — is part of. A mainspring.
What it is a kind of
- Spring — is a kind of. A mainspring is a spiral spring.