Roughly 2,000 years ago, Hero of Alexandria described self-opening temple doors! 🔥 Fire heated air in a vessel, increasing pressure and forcing water into a bucket. The bucket’s added weight pulled the doors open through ropes and pulleys. When the fire was extinguished, the air cooled, water flowed back and the doors closed—no separate manual reset needed. Hero’s writings preserve the design; they do not confirm that he built full-sized doors for a temple. 🚪⚙️
Hero of Alexandria described heat-powered temple doors roughly 2,000 years ago
Key facts
- Hero of Alexandria, also known as Heron, described the automatic temple-door design in the 1st century CE, roughly 2,000 years ago.
- His writings describe the mechanism; they do not confirm that he built a full-sized temple installation.
- Fire heated air in a vessel, raising pressure and forcing water into a bucket.
- The water's added weight operated the doors through ropes and pulleys; displaced water did not simply release a counterweight.
- As the air cooled, water flowed back and the mechanism closed the doors without a separate manual reset.
- It used thermal expansion, fluid pressure and mechanical components, with no electricity.
Sources
Heron of Alexandria - Automated Temple Doors - Vimeovimeo.com
He was experimenting with steam-powered devices and one of his inventions where automatically opening temple doors, powered by a fire altar ...
Heron of Alexandria II: The world's first “automobile” and other ...aquincum.hu
If a fire is lit on the altar, the temple doors open. If the fire goes out, the doors close. A wide tube is fed through the altar. The closed top of the ...
Heron of Alexandria – Automated Temple Doors - artefacts-berlin.deartefacts-berlin.de
One of his inventions were automatically opening temple doors, powered by a fire altar and a hydraulic system.
Hero of Alexandria: The Father of Automationhistoryisnowmagazine.com
Hero is best remembered for his ingenious devices, many of which were powered by water, air pressure, and steam—pioneering innovations that made ...
Hero of Alexandriaen.wikipedia.org
... automatic opening or closing of ... By attaching ropes to the axial shaft Hero used the developed power to perform tasks such as opening temple doors ...
Hero of Alexandria: The Father of Automationhistoryisnowmagazine.com
The ingeniously designed system developed by Hero to open and close temple doors using the same principles of steam power that Hero discovered ...
Invention of Automatic Doors | A Look Back In Timeadcentrances.com
Around the 1st century AD, engineer Heron of Alexandria designed a steam-powered mechanism to open temple doors – an early example of automation. Though ...
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