"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 - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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