Electric bell
device · 1831 · Industrial Revolution
A bell driven by an electromagnet (Henry).
What it is made of
- Electromagnet — has part. An electromagnet strikes a small hammer.
- Light switch — has part. A button.
Principles and materials it uses
Where it is used
- Alarm clock — is part of. A bell.
What it is a kind of
- School bell — includes. An electric bell.