How the Atmos Clock Works: Engineering That Runs on Air

At the heart of the Atmos is a sealed capsule containing a special gas mixture (primarily ethyl chloride). This gas expands and contracts with even the slightest fluctuations in temperature — as little as one degree Celsius is enough to wind the clock for two days.

This expansion powers a bellows mechanism, which in turn winds the mainspring of the clock. It's a highly efficient system: the Atmos consumes so little energy that it can run for years without any human intervention.

The Atmos movement is finely tuned to operate with minimal friction and very low energy consumption. In fact, it uses about 1/240th of the energy of a conventional mechanical watch.

Key features include:

• A torsion pendulum that rotates slowly back and forth (instead of swinging)
• A full rotation every 30 seconds - which gives the clock its signature calm, smooth movement
• Suspension on a thin wire for maximum efficiency and minimal resistance

This ultra-slow and precise movement allows the Atmos to keep remarkably accurate time - all while consuming virtually no power.

While Atmos clocks are incredibly efficient, they are also delicate instruments that require expert maintenance. Over time, oils may degrade, seals can lose pressure, or the bellows mechanism can fail — all of which affect the clock's ability to stay wound and keep accurate time.

That's why proper servicing by an Atmos specialist is essential. Unlike standard mechanical clocks, the Atmos requires a unique understanding of both clockmaking and thermodynamics to repair and regulate correctly.

If you own an Atmos clock or are considering restoring one, feel free to contact us with any questions. We're happy to explain how your specific model works and provide expert repair and maintenance services to keep it running for decades to come.