The Atmos Clock

The Atmos is the clock that “Lives on Air.” Unlike most clocks, the Atmos never needs winding.

These clocks differ from the “typical” clock and require that the factory repair specifications be followed exactly.

It’s the bellows in the Atmos clock that make them unique and often require attention more than any other part in the clock. The Bellows are the gas filled chamber located in the ‘Drum’ at the rear of the clock. Contraction and expansion of the bellows is created by changes in temperature and barometric pressure. This movement of the bellows winds the mainspring and provides the power to the clock. The bellows in an Atmos Clock can last as long as 30 years, sometimes longer. However, the actual lifespan of this unit will vary. The Bellows is constantly expanding and contracting even when the clock is in storage, over time this process wears the bellows chamber causing microscopic cracks. They will eventually need to be repaired and refilled or replaced altogether. Our first task in assessing your Atmos clock is to test your Bellows to see if they perform to factory specifications, enough to wind the clock.

Standard Movement Service (also known as an overhaul) is recommended by the factory every 25 years. Standard movement service on an Atmos Clock consists of complete disassembly of the clock, cleaning of all parts, inspection and necessary repair, adjustment and the installation of new parts as needed. In addition, your clock will be regulated to keep time within 30 seconds per month as shown by our Microset clock timer. The glass and case are cleaned during the service process.

Other parts that may need replacement are the suspension spring and the main spring.

The Suspension Unit: This is a flat, thin steel spring that has a thickness less than a human hair. There are special fittings at either end of the suspension spring that allow it to suspend the mass of the pendulum. Its condition is crucial to the accurate timekeeping of the clock. The suspension spring may actually never need replacing unless the clock has experienced improper handling, such as moving the clock without first locking the pendulum in place or other abuse. In some rare cases, the suspension spring of a particularly old Atmos Clock may need to be replaced due to an unusual amount of wear. The clock must be disassembled to remove and inspect the suspension spring.

The Mainspring may be sticky with old lubricant or become “set” and  may no longer have the strength necessary to power the clock. The clock must be completely disassembled to remove and inspect the mainspring.

Brien has a special affection for the Atmos Clock, owning several, and has received special training on the repair of these unique clocks. He services and repairs all Atmos models.

Please contact us if you would like to ship us your Atmos clock for repair. With a little forethought and careful packaging, the Atmos clock will ship nicely. Upon its return to you, all that will need to be done is unpack your clock, set it up and enjoy.