Perpetual motion is what engineers have been eternally striving for, creating a piece of machinery which moves without putting in any energy. While this clock does not achieve perpetual motion, it is 100% legitimate.



  • Fact 1: Designed by Jaeger-LeCoultre in Switzerland, the Atmos clock converts changes in temperature and air pressure into energy to wind itself.
  • Fact 2: A temperature change of 1¡C can power the Atmos clock for two days.
  • Fact 3: The Atmos Clock is frequently called a "perpetual motion clock" even though perpetual motion is impossible according to our current understanding of physics.
  • Fact 4: In order for Atmos clocks to run on so little energy, they are designed to operate as friction-free as possible.
  • Fact 5: The Atmos clock uses a sealed chamber of gaseous and liquid ethyl chloride, which powers the winding of a spring as it expands and contracts. This spring powers the entire clock.

Start a Discussion Discussions about LeCoultre Atmos Clock

  • Repairs

    • I have a LeCoutre Atmos clock which stopped running. How do I get it going again ?