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  2. Escapement - Wikipedia

    en.wikipedia.org/wiki/Escapement

    The verge became the standard escapement used in all other early clocks and watches, and remained the only known escapement for 400 years. Its performance was limited by friction and recoil, but most importantly, the early balance wheels used in verge escapements, known as the foliot , lacked a balance spring and thus had no natural "beat ...

  3. Lever escapement - Wikipedia

    en.wikipedia.org/wiki/Lever_escapement

    A typical watch lever escapement beats at 18,000 or more beats per hour. Each beat gives the balance wheel an impulse, so there are two impulses per cycle. Despite being locked at rest most of the time, the escape wheel rotates typically at an average of 10 rpm or more. The origin of the "tick tock" sound is caused by this escapement mechanism.

  4. Pallet fork - Wikipedia

    en.wikipedia.org/wiki/Pallet_fork

    Pallet fork with jewel pallets (pink) The pallet fork is above the balance wheel in this watch movement. The pallet fork is a component of the lever escapement of a mechanical watch. [1] The pallet fork and the lever form one component that sits between the escape wheel and the balance wheel. Its purpose is to lock the escape wheel, and release ...

  5. Balance wheel - Wikipedia

    en.wikipedia.org/wiki/Balance_wheel

    Early balance wheels were pushed in one direction by the escapement until the verge flag that was in contact with a tooth on the escape wheel slipped past the tip of the tooth ("escaped") and the action of the escapement reversed, pushing the wheel back the other way. In such an "inertial" wheel, the acceleration is proportional to the drive force.

  6. Wheel train - Wikipedia

    en.wikipedia.org/wiki/Wheel_train

    Pocket watch with gears labelled. The going train is the main gear train of the timepiece. It consists of the wheels that transmit the force of the timepiece's power source, the mainspring or weight, to the escapement to drive the pendulum or balance wheel. [4] The going train has two functions.

  7. Jewel bearing - Wikipedia

    en.wikipedia.org/wiki/Jewel_bearing

    A typical fully jeweled time-only watch has 17 jewels: two cap jewels, two pivot jewels and an impulse jewel for the balance wheel, two pivot jewels and two pallet jewels for the pallet fork, and two pivot jewels each for the escape, fourth, third, and center wheels. In modern quartz watches, the timekeeper is a quartz crystal in an electronic ...

  8. Coaxial escapement - Wikipedia

    en.wikipedia.org/wiki/Coaxial_escapement

    The coaxial escapement is a type of modern watch escapement mechanism invented by English watchmaker George Daniels in 1976 and patented in 1980. It is one of the few watch escapements to be invented in modern times and is used in most of the mechanical watch models currently produced by Omega SA.

  9. George Daniels (watchmaker) - Wikipedia

    en.wikipedia.org/wiki/George_Daniels_(watchmaker)

    Lepine calibre construction with two going barrels with two contra rotating identical trains driving the two escape wheels of the Daniels double wheeled escapement incorporating a T-shaped central locking detent with three pallets. This was the first Daniels escapement watch. 32 hour duration.

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