"Atmos is the brand name of a mechanical clock manufactured by Jaeger LeCoultre in Switzerland which doesn't need to be wound. It gets the energy it needs to run from small temperature changes in the environment, and can run for years without human intervention. ts power source is a hermetically sealed capsule containing a mixture of gas 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 variation in temperature of only one degree in the range between 15 and 30 degrees Celsius is sufficient for two days' operation."
It certainly does take in energy, in this case from the heat that causes temperature changes in the surrounding air. If it were held at a perfectly constant temperature, it would eventually stop running.
I have a watch that never needs to be wound, either. It gets the necessary energy from a small solar cell embedded in the face.
Once again, the idea of perpetual motion is shown to be nonsense.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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