Mechanical Oscillator - Earthquake Machine

Tesla's mechanical oscillator, patented in 1893, was a steam-powered device generating precise vibrations for applications like clocks or engines. He claimed it could resonate with buildings to cause earthquakes, famously shaking a New York structure during tests.

This "earthquake machine" exemplified his mastery of resonance. While exaggerated in lore, it influenced seismic research and vibration technologies in engineering.