Modeling and analysis of an atmospheric driven Atmos clock with mechanical escapement control

The classic Atmos mantle clock operates on atmospheric differences to power the mechanical bellows and wind the mainspring. A delicate gear train and verge turn a torsional pendulum with minimal frictional losses throughout the system. A pair of hands display the time on a dial in twelve hour increments. In this paper, an Atmos 540 clock has been investigated as it offers vivid insight into a mechanical escapement controller with integrated system components, and a “green” temperature and/or pressure driven power source. The clock design, operation, and mathematical model representing the energy flow through the system will be presented. Representative experimental and analytical results will be introduced and discussed to demonstrate the clock´s functionality. Finally, the question of whether this clock meets the definition of a perpetual motion machine will be examined.