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Free pendulum clock, English, 1899.

Free pendulum clock, English, 1899.
4 0 c m
actual image size: 23cm x 32cm


Made by R J Rudd of Croydon, Surrey, this highly original pendulum clock allows the pendulum to swing freely for a whole minute without being controlled by the escapement. Instead, Rudd employed a subsidiary or 'slave' clock to deliver an impulse to the pendulum once every minute and to keep time during the intervals between impulses.

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© Science Museum / Science & Society Picture Library

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