Respirator
device · 1910 · Electric age
A filtering mask (the anti-plague mask — Wu Lien-teh).
What it is made of
- Melt-blown filter layer — has part. An electrostatic precipitator.
- Exhalation valve — has part. It makes exhaling easier.
- Nose clip wire — has part. A snug fit.
Principles and materials it uses
- Vulcanized rubber — is made of. The mask is rubber.
- Activated carbon — is made of. The filter is activated carbon.
History: what it evolved from and what it influenced
- Surgical mask — evolved from. A filtering mask.
- Gas mask — evolved into. Respiratory protection.