Can you edit themes in excel for macĪdding a small amount of weight to the middle of the pendulum moves its centre of gravity upwards, which has the effect of shortening its length.īecause the time taken for the pendulum to complete one swing is proportional to the square root of the length, decreasing the length will slightly decrease the time taken and the clock will speed up. Turning the crank lowers a weight onto a circular platform on the pendulum. Note that neither dial has any mechanical connection to the pendulum. The seconds dial is controlled by a separate seconds counter so that its hand ticks with every swing of the pendulum. This means that the minute and hour hands only move every 30 seconds. The lever carries a roller which impulses an arm attached to the pendulum restoring the energy lost in the previous half minute. Inside the case is a pendulum with a period of two seconds and a countwheel which advances one tooth with each swing of the pendulum.Įvery 30 seconds the countwheel trips a detent and an L-shaped lever falls.
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