Inventions · Topic 76 of 112
The Revolving Door
⭐ MasteredA revolving door has panels that turn around a central axis. It helps keep warm or cool air inside a building while letting people move through easily.
💡 Fun fact
The first revolving door was patented in 1888 and was used to keep draughts out of buildings.
All about The Revolving Door
A revolving door has panels that turn around a central axis. It lets people move through the building easily while helping to keep warm or cool air inside. The turning panels also reduce draughts entering the building.
The first revolving door was patented in 1888 and was used to keep draughts out of buildings. Revolving doors are still common in hotels, offices and shops today.
🎮 Try it yourself!
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