Here are a few of the Jaeger LeCoultre Atmos clocks that I own and some being timed for customers and some for sale. I service each of them myself with as much care and detail as possible as these are very sensitive timepieces.
I specialize in complete restoration and repair of all types of Atmos Clocks and with more than 30 years collecting timepieces and more than 15 repairing Atmos clocks I have the skills, knowledge and experience to properly repair your prized heirloom!
Collecting and restoring these beautiful timepieces is a true passion of mine and I want my buyers to get the same enjoyment out of owning and collecting these clocks that I do. Please contact me if you have any questions.
Atmos is the brand name of a mechanical clock manufactured by Jaeger-LeCoultre in Switzerland which does not need to be wound manually. It gets the energy it needs to run from temperature and atmospheric pressure changes in the environment, and can run for years without human intervention.
Its power source is an internal hermetically sealed capsule containing a mixture of gaseous and liquid ethyl chloride, which expands into an expansion chamber as the temperature rises, compressing a spiral spring; with a fall in temperature the gas condenses and the spring slackens. This motion constantly winds the mainspring. A temperature variation of only one degree in the range between 15 and 30 degrees Celsius, or a pressure variation of 3 mmHg, is sufficient for two days’ operation.
In order to run the clock on this small amount of energy, everything inside the Atmos has to work in as friction-free a manner as possible. For timekeeping it uses a torsion pendulum, which consumes less energy than an ordinary pendulum. The torsion pendulum executes only two torsional oscillations per minute, which is 1/30th the rate of the pendulum in a grandfather clock.