How the Atmos Clock Works

How the Atmos works:
virtually by the conquest of perpetual motion

Endless generations of inventors have devised a thousand and one solutions to the problem of perpetual motion... all in vain. lt has been completely established that no mechanical movement can exist without an outside power force. Leaving wear aside, a machine can function only as long as it has something to consume: petrol, gas, electricity, atomic power...

Then the Atmos was created

With no human intervention, almost without wear, the Atmos itself draws its energy from a source which may well be called perpetual... the continual variation of the temperature. lt really does live on air!

When an anaesthetic transmits the energy...

ln order to make use of energy contained in temperature variation, an appropriate "transmitter" must be found. The required qualities are offered by ethyl chloride. Its formula (C2H5Cl) is that of an anaesthetic well known in dental surgery. One of its particular qualities is the possession of a particularly high coefficient of expansion between 50° and 81°F. For tropical countries, there is a different "motor", i.e. a gas with an optimum coefficient of expansion between 72° and 95°F.

The secret of the Atmos

How does this C2H5Cl transmit the energy to wind the Atmos? lt is enclosed in a metallic chamber (1) which, since it is formed as a bellows, acts as an expansion chamber. (This cannot be seen, as it is protected by a brass cover [2].) When the temperature rises, the gas expands and the chamber stretches like an accordion, compressing a spiral spring (3) which acts as a counter-weight. At 81°F, it is fully compressed. When the temperature falls, the pressure is released, the expansion chamber contracts and the spring-counterweight slackens. At 50°F, bellows and spring are fully released.


The proprietors Father and Son, John and Mark Coxhead have a combined passion for collecting clocks and have turned their dream into a very successful business dealing in quality restored clocks. This family business established 18 years ago is located from a pretty 19th century shop in the Kings Road, Chelsea, London. This prestigious area is world renowned for fine quality antique shops and fine art galleries.

Mark and John have been selling and restoring clocks for the last 18 years and because they have a large amount of stock always for sale in their showroom they see a big cross reference of antique clocks having restored their own showroom clocks as well as customers clocks. They restore the clocks for the British Home Office and for the Royal Lifeguards, Hyde Park. We are also proud to have sold clocks to members of the British Royal Family.

All their clocks are restored by themselves and come with a full years guarantee in the UK. They also stock a wide selection of carriage and wall clocks ranging from unusual English station wall clocks to fine Regency period drop dial clocks.  Also they carry a variety of interesting French period carriage clocks ranging from simple timepieces to repeaters. All their carriage clocks have the original platform escapements and not replacement modern ones.