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  2. 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]

  3. Torsion pendulum clock - Wikipedia

    en.wikipedia.org/wiki/Torsion_pendulum_clock

    A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...

  4. Wind-up toy - Wikipedia

    en.wikipedia.org/wiki/Wind-up_toy

    After the larger, elaborate wind-up machine art declined in interest, wind-up toys were created cheaply in large numbers by the 1800s. Wind-up machines became known as wind-up toys, and were designed in different forms to move around. [1] European toy makers created and mass-produced the first wind-up tin toys during the late 1880s.

  5. Clockwork - Wikipedia

    en.wikipedia.org/wiki/Clockwork

    [1] [2] [3] A clockwork mechanism is often powered by a clockwork motor [4] consisting of a mainspring, a spiral torsion spring of metal ribbon. Energy is stored in the mainspring manually by winding it up, turning a key attached to a ratchet which twists the mainspring tighter. Then the force of the mainspring turns the clockwork gears, until ...

  6. Mainspring - Wikipedia

    en.wikipedia.org/wiki/Mainspring

    After winding, the arbor is stationary and the pull of the mainspring turns the barrel, which has a ring of gear teeth around it. This meshes with one of the clock's gears, usually the center wheel pinion and drives the wheel train. The barrel usually rotates once every 8 hours, so the common 40-hour spring requires 5 turns to unwind completely.

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  8. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The weight-driven clock was probably a Western European invention, as a picture of a clock shows a weight pulling an axle around, its motion slowed by a system of holes that slowly released water. [84] In 1271, the English astronomer Robertus Anglicus wrote of his contemporaries that they were in the process of developing a form of mechanical ...

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