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  2. Cycloid gear - Wikipedia

    en.wikipedia.org/wiki/Cycloid_gear

    2. The gear trains used in clocks and watches have multiple stages of wheels and pinions in which the pinions have few leaves. Involute designs for these leaves would be undercut, making them too fragile and difficult to manufacture. 3. A large aspect of the design of watch and clock movements is the minimisation of friction.

  3. Lavet-type stepping motor - Wikipedia

    en.wikipedia.org/wiki/Lavet-type_stepping_motor

    To make a Lavet motor turn, the current through its stator coil must change direction each step (bipolar) followed by an interval without current while the rotor moves to its reluctant position. Aside from clock drives, there are many variations of Lavet's concept. [2] One example are types of dashboard instruments in cars. [3]

  4. Wheel train - Wikipedia

    en.wikipedia.org/wiki/Wheel_train

    In striking clocks, the striking train is a gear train that moves a hammer to strike the hours on a gong. It is usually driven by a separate but identical power source to the going train. In antique clocks, to save costs, it was often identical to the going train, and mounted parallel to it on the left side when facing the front of the clock. [11]

  5. Geneva drive - Wikipedia

    en.wikipedia.org/wiki/Geneva_drive

    The Geneva drive or Geneva mechanism is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion. The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel (driven wheel) that advances it by one step at a time. The drive wheel also has an elevated circular ...

  6. How two strangers found each other and solved the mystery of ...

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    The clock, just 7 inches high, sat under a rounded glass dome on one of the highest shelves in the library of his family's house in Rochester, N.Y. ... "Your grandfather married my step ...

  7. Clockmaker - Wikipedia

    en.wikipedia.org/wiki/Clockmaker

    Clockmakers must be able to read blueprints and instructions for numerous types of clocks and time pieces that vary from antique clocks to modern time pieces in order to fix and make clocks or watches. The trade requires fine motor coordination as clockmakers must frequently work on devices with small gears and fine machinery. [citation needed]

  8. Why One of England’s Richest Men Spent $2 Billion to Make His ...

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    Add to that a gear shift so intractable that my left arm alone can’t unlock it to switch between low and high range. I quickly discover that I need to remove my hands from the wheel and use both ...

  9. Movement (clockwork) - Wikipedia

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

    The barrel or pulley has gear teeth on it which drives the center wheel. Wheel train A wheel train is a gear train that transmits the force of the power source to the escapement. Large gears known as wheels mesh with small gears known as pinions. The wheels in a typical going train are the centre wheel, third wheel, and fourth wheel.

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