Suspended in a bubble block of Baccarat crystal and powered by temperature change, Jaeger LeCoultre's Atmos 561 mechanical clock is the work of Australian super-designer Marc Newson (known for designing the Ikepod watch and a million other sleek objects). Using small temperature changes in the encapsulated environment for power, Atmos clocks can run for years without human intervention. Their power source is a hermetically sealed capsule containing a mixture of gas and liquid ethyl chloride, which expands into a 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 variation in temperature of only one degree in the range between 15 and 30 degrees Celsius is sufficient for two days of operation.
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