Home > Terms > English, UK (UE) > Hanging-ball clock

Hanging-ball clock

A clock devised in the mid 17th century which enclosed a balance-controlled mechanism in a metal sphere to indicate the time by means of a band rotating on its circumference past a fixed pointer. The weight of the clock itself was the driving force, and it was suspended from a cord wound round a barrel inside the clock, the clock gradually descending as the hours passed. Winding was accomplished by raising the clock to the top of the cord, and a spring inside the barrel caused the latter to rotate and wind it up. The fusee of conventional clocks was eliminated but a barrel and spring still had to be provided.

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  • Part of Speech: noun
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  • Industry/Domain: Chronometry
  • Category: Clock
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