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Congreve's Rolling Ball Clock as it appeared in his patent application of 1808 A rolling ball clock from 1820 in the British Museum.. A Congreve clock (also known as Congreve's Rolling Ball Clock or Oscillating Path Rolling Ball Clock) is a type of clock that uses a ball rolling along a zigzag track to regulate the time.
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Archimedean Excogitation consists of a metal and glass display case framing a system of nine tracks on two main levels. [1] [3] The lower level tracks contain billiard balls, which encounter a series of mechanical obstacles as they roll, some of which (such as a drum and xylophone) produce noise.
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