The Atmos is a type of clock manufactured by Jaeger LeCoultre in Switzerland. A clock (from the Latin cloca, bell) is an instrument for measuring time. ... For the Arena John Labatt Centre in London, Ontario Jaeger-LeCoultre Master Control: réserve de marche, chronograph and date on hand. ...

Inside a hermetically sealed capsule is a mixture of gas and liquid (ethyl chloride) which expands as the temperature rises in the expansion chamber, which then compresses a spiral spring, with a fall in temperature the gas condenses and the spring slackens. This motion constantly winds the mainspring, a variation in temperature of only one degree in the range between 15 and 30 degrees Celsius being sufficient for two days' operation. The term hermetically sealed is used to describe something that has an airtight seal. ... Ethyl chloride is a chemical compound once widely used in producing tetraethyl lead, a gasoline additive. ... Mainspring (U.S.A. motor spring): In a watch, long strip of hardened and blued steel or of a specially alloyed steel, between 2oo & 3oo millimeters in length and 0. ...

To convert this small amount of energy into motion, everything inside the Atmos has to work as friction-free as possible. The balance, for example, executes only two torsional oscillations per minute, which is 150 times slower that the pendulum in a conventional clock.

In 1928 a Neuchatel engineer called Jean-Leon Reutter built a clock driven by a mercury in glass expansion device which rotated a cylinder which wound the mainspring by ratchet. The mechanism operated on temperature change only. But it took the Jaeger-LeCoultre workshop a few more years to convert this idea into a technical form that could be patented. Neuchâtel (German: Neuenburg) is a city in Switzerland which is the capital of the Canton of Neuchâtel. ...

An early predecessor is Cox's timepiece, a clock developed in the 1760s by James Coxand and John Joseph Merlin, while the oldest predecessor still running today is the 1864 Beverly Clock. Coxs timepiece is a clock developed, in the 1760s, by James Cox (with the help of John Joseph Merlin). ... The Beverly Clock is a clock situated in the foyer of the Department of Physics at the University of Otago, Dunedin, New Zealand. ...

References

• LeCoultre Atmos Clock History
• The Atmos clock page