132 ⟶ Zhang Heng Invents the First Seismoscope
Seismometer and pendulum in Han dynasty China, built by Zhan...
Year
-40
39
105
125
132
🔨 Earliest Reference to Hydraulic Trip Hammer in Ji Jiu Pian
The Chinese Ji Jiu Pian dictionary published in 40 BC during the Han dynasty is the earliest known reference to the hydraulic-powered trip hammer device.⟶
Han DynastyDictionary
China
⚙️ Zhang Heng invents the Water-Powered Armillary Sphere
Zhang Heng of China invents the world's first water-powered armillary sphere.⟶
AstronomyZhang HengHan Dynasty
China🌏 Zhang Heng Invents the First Seismoscope
Seismometer and pendulum in Han dynasty China, built by Zhang Heng. It is a large metal urn-shaped instrument which employed either a suspended pendulum or inverted pendulum acting on inertia, like the ground tremors from earthquakes, to dislodge a metal ball by a lever trip device.⟶
Han DynastySeismologyInstrumentationZhang HengEarthquake
China🧲 Zhang Heng Develops First Seismoscope
Zhang Heng of China invents first seismometer to detect the cardinal direction of earthquakes.⟶
Scientific InstrumentsSeismologyGeophysicsHan DynastyMeasurement
China