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  2. Atmos clock - Wikipedia

    en.wikipedia.org/wiki/Atmos_clock

    The torsion pendulum has a period of precisely one minute; thirty seconds to rotate in one direction and thirty seconds to return to the starting position. This is thirty times slower than the 0.994 m (39.1 in) seconds pendulum typically found in a longcase clock, where each swing (or half-period) takes one second.

  3. Riefler escapement - Wikipedia

    en.wikipedia.org/wiki/Riefler_escapement

    The Riefler escapement is a mechanical escapement for precision pendulum clocks invented and patented [1] by German instrument maker Sigmund Riefler in 1889. [2] It was used in the astronomical regulator clocks made by his German firm Clemens Riefler from 1890 to 1965, [3] which were perhaps the most accurate all-mechanical pendulum clocks made.

  4. Escapement - Wikipedia

    en.wikipedia.org/wiki/Escapement

    Original drawing (c. 1637) of Galileo's pendulum clock and escapement. Galileo's escapement is a design for a clock escapement, invented around 1637 by Italian scientist Galileo Galilei. It was the earliest design of a pendulum clock. Since he was blind by then, Galileo described the device to his son, who drew a sketch of it. The son began ...

  5. Conservation and restoration of clocks - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Conservation experts advise clocks need to be serviced regularly. A clock is a complex mechanical contraption made of a variety of materials and with many small moving parts. [10] Even under perfect conditions lubricants deteriorate. Clocks should be examined and re-lubricated every three years.

  6. 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.

  7. Movement (clockwork) - Wikipedia

    en.wikipedia.org/wiki/Movement_(clockwork)

    The timekeeping element, either a pendulum or a balance wheel. It swings back and forth, with a precisely constant time interval between each swing, called the beat. A pendulum movement has a pendulum hangar usually attached to a sturdy support on the back, from which the pendulum is suspended and a fork which gives the pendulum impulses. The ...

  8. Balance wheel - Wikipedia

    en.wikipedia.org/wiki/Balance_wheel

    A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.

  9. Verge escapement - Wikipedia

    en.wikipedia.org/wiki/Verge_escapement

    In later pendulum clocks the pendulum was suspended by a short straight spring of metal ribbon from the clock frame, and a vertical arm attached to the end of the verge rod ended in a fork which embraced the pendulum rod; this avoided the friction of suspending the pendulum directly from the pivoted verge rod.

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