Lecoultre "atmos" Clock, - Nov 19, 2016 | Richard D. Hatch & Associates In Nc
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LeCoultre "Atmos" Clock,

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LeCoultre "Atmos" Clock,
LeCoultre "Atmos" Clock,
Item Details
Description
Roman numeral dial, 9.25" tall, working......Atmos is the brand name of a mechanical torsion pendulum 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.[1] This motion constantly winds the mainspring. A temperature variation of only one degree in the range between 15 °C (59 °F) and 30 °C (86 °F), 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 1/30 the rate of the pendulum in a grandfather clock.
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LeCoultre "Atmos" Clock,

Estimate $400 - $600
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Starting Price $200
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Item located in Flat Rock, NC, us
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Richard D. Hatch & Associates

Richard D. Hatch & Associates

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