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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

    Lavet-type stepping motor of a quartz clock. A black rotor sprocket provides the mechanical output. The Lavet-type stepping motor has widespread use as a drive in electro-mechanical clocks [1] and is a special kind of single-phase stepping motor. Both analog and stepped-movement quartz clocks use the Lavet-type stepping motor (see Quartz clock).

  4. Gear manufacturing - Wikipedia

    en.wikipedia.org/wiki/Gear_manufacturing

    Gear manufacturing refers to the making of gears. Gears can be manufactured by a variety of processes, including casting , forging , extrusion , powder metallurgy , and blanking . As a general rule, however, machining is applied to achieve the final dimensions, shape and surface finish in the gear.

  5. Escapement - Wikipedia

    en.wikipedia.org/wiki/Escapement

    Animation of an anchor escapement, widely used in pendulum clocks. An escapement is a mechanical linkage in mechanical watches and clocks that gives impulses to the timekeeping element and periodically releases the gear train to move forward, advancing the clock's hands.

  6. 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]

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  8. 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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