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  2. Cuckoo clock - Wikipedia

    en.wikipedia.org/wiki/Cuckoo_clock

    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. Some move their wings and open and close their ...

  3. Pendulum clock - Wikipedia

    en.wikipedia.org/wiki/Pendulum_clock

    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.

  4. Kinsler: Why the cuckoo bird is associated with declining ...

    www.aol.com/kinsler-why-cuckoo-bird-associated...

    In which Mark Kinsler - noted clock repairman - battles with a cuckoo clock. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...

  5. Pendulum - Wikipedia

    en.wikipedia.org/wiki/Pendulum

    "Simple gravity pendulum" model assumes no friction or air resistance. A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. [1] When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

  6. Escapement - Wikipedia

    en.wikipedia.org/wiki/Escapement

    In a pendulum clock, the crown wheel and staff were oriented so they were horizontal, and the pendulum was hung from the staff. However, the verge is the most inaccurate of the common escapements, and after the pendulum was introduced in the 1650s, the verge began to be replaced by other escapements, being abandoned only by the late 1800s.

  7. Anchor escapement - Wikipedia

    en.wikipedia.org/wiki/Anchor_escapement

    The escapement is a mechanism in a mechanical clock that maintains the swing of the pendulum by giving it a small push each swing, and allows the clock's wheels to advance a fixed amount with each swing, moving the clock's hands forward. The anchor escapement was so named because one of its principal parts is shaped vaguely like a ship's anchor.

  8. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The most accurate pendulum clocks were controlled electrically. [166] The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer.

  9. Clock won't stop after most first downs in college football ...

    www.aol.com/sports/clock-wont-stop-most-first...

    The clock has stopped after all first downs in college football games since 1968 and is restarted after the ball is positioned and whistled to be ready for play. And while it will still stop after ...

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