| 21. | The Accutron was different than previous watches as it did not contain a balance wheel or mainspring.
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| 22. | Seated at his bench, he picked up a watch escapement, the section that contains the balance wheel.
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| 23. | Ulysse Nardin in cooperation with GFD developed the first hairspring for the balance wheel in polycrystalline diamond.
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| 24. | This chronograph uses a balance wheel which oscillates at of a rate of 36, 000 alternations per hour.
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| 25. | The impulse pin is located within the lever fork and the balance wheel is near its center position.
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| 26. | The purpose of doing this was to eliminate the " middle temperature " error of the balance wheel.
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| 27. | British watchmakers used the English detached lever, in which the lever was at right angles to the balance wheel.
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| 28. | The roller jewel is responsible for coupling the motion of the balance wheel to that of the pallet fork.
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| 29. | The insurgency led to a fatal split down the middle in 1912 as the GOP lost its balance wheel.
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| 30. | As with the pendulum, the escapement must provide a small kick each cycle to keep the balance wheel oscillating.
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