Who can talk about the working principle of Jaeger-LeCoultre gas clock?

Its working principle is that when the temperature rises, the chloroethane gas expands rapidly and the expansion box stretches like an accordion. At the same time, a large coil spring in the expansion box is compressed. When the temperature rises to 81f, the coil spring will be completely compressed. When the temperature drops, the chloroethane gas shrinks rapidly, so does the expansion box, and the coil spring is loose. The change of temperature makes the coil spring compress and relax. When the temperature rises to 50°F, the coil spring will completely relax. Because the expansion box reciprocates with compression and relaxation, it is a small chain, which is connected with the spring box through pulleys to wind the spring. The greater the temperature difference changes, the more the upper chord. It is said that as long as there is a temperature change of 2 F every day, the energy generated is enough to keep Atmos clock running for 48 hours.