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Cuckoo clock, a so-called Jagdstück ("hunt piece"), Black Forest, c. 1900, Deutsches Uhrenmuseum, Inv. 2006-013. A cuckoo clock is a type of clock, not typically pendulum driven, that strikes the hours with a sound like a common cuckoo call and has an automated cuckoo bird that moves with each note. Some move their wings and open and close ...
Huygens' maintaining power in use. The weight drive used by Christiaan Huygens in his early clocks acts as a maintaining power. In this layout, the weight which drives the clock is carried on a pulley and the cord (or chain) supporting the weight is wrapped around the main driving wheel on one side and the rewinding wheel on the other.
Cuckoo clock with wooden plate movement, fusee driven, 8 day fusee, probably by Johann Baptist Beha, Eisenbach, ca. 1885 (Deutsches Uhrenmuseum, Inv. 15-3833). There is a music box in the base of the clock.
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A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator : It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.
The first clock known to strike regularly on the hour, a clock with a verge and foliot mechanism, is recorded in Milan in 1336. [96] By 1341, clocks driven by weights were familiar enough to be able to be adapted for grain mills, [97] and by 1344 the clock in London's Old St Paul's Cathedral had been replaced by one with an escapement. [98]
Date/Time Thumbnail Dimensions User Comment; current: 10:12, 11 August 2022: 1,533 × 2,300 (171 KB): Jafd88 {{Information |Description=Cuckoo clock with a case designed by Robert Bichweiler and manufactured by the carpenter Johann Winterhalder in Urach.
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