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The Kremlin Clock on the Moscow Kremlin rings in 2012.. The most basic sort of striking clock simply sounds a bell once every hour; this is called a passing strike clock. . Passing strike was simple to implement mechanically; all that must be done is to attach a cam to a shaft that rotates once per hour; the cam raises and then lets a hammer fall that strikes t
The mechanism uses 2 chimes of different tones. The low tone usually signals the hours, and the high tone the quarter hours. As an example, if the time is 2:45, the quarter repeater sounds 2 low tones and after a short pause 3 high ones: "dong, dong, ding, ding, ding".
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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, 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.
A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.
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