![]() ![]() ![]() His clocks were driven by a "mercury in glass" expansion device which rotated a cylinder which wound the mainspring by ratchet. These prototypes were never sold and never called the Atmos 0 at that time. Jean-Leon Reutter, in France, designed the Atmos Clock in 1927 and this is referred too as the Atmos 0. The following is primarily from Living on Air - History of the Atmos Clock by Jean Lebet. The above information comes from LeCoultre catalogues and documents. ![]() Kennedy, Sir Winston Churchill, General Charles DeGaulle, and Charlie Chaplin. The Atmos has had the honour to be associated with great statesmen, royalty, and other renowned people including John F. After which, many end up in the very best homes, because for decades now the world's most celebrated watch-making country has been presenting its distinguished guests with this masterpiece of Swiss artistry. Only then, were the Jaeger-LeCoultre master watchmakers happy enough with the state of things to confirm it with a signature and allow another Atmos to leave the workshop. JAEGER LECOULTRE WATCH SERIAL NUMBERS TRIALNot counting the five weeks of trial and adjustment that every Atmos has to undergo. Because every Atmos is still made entirely by hand and with some models a single clock takes a whole month to produce. Connoisseurs of elegant forms, precious materials and traditional craftsmanship, do so as well. An Atmos can therefore expect to enjoy a service life of a good 600 years, although with today's air pollution a through cleaning is recommended about every twenty years.Īdmirers of advanced technology, however, aren't the only ones who get their money's worth. So it's not surprising that 60 million Atmos clocks together consume no more energy that one 15-watt light bulb.Īll its other parts, too, are not only of the highest precision, but also practically wear-free. The balance, for example, executes only two torsional oscillations per minute, which is 150 times slower that the pendulum in a conventional clock. To convert this small amount of energy into motion, everything inside the Atmos naturally has to work as smoothly and quietly as possible. This motion constantly winds the mainspring, a variation in temperature of only one degree in the range between 15 and 30 degrees centigrade being sufficient for two days' operation. The technical principle is a beguiling one: inside a hermetically sealed capsule is a mixture of gas and liquid (ethyl chloride) which expands as the temperature rises and contracts as it falls, making the capsule move like a concertina. And to perfect it to such a degree that the Atmos practically achieved perpetual motion. But it took the Jaeger-LeCoultre workshop a few more years to convert this idea into a technical form that could be patented. In 1928 a Neuchatel engineer called Jean-Leon Reutter built a clock driven quite literally by air. ![]()
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