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Used in watches, the keyless works are the gears that wind the mainspring when the crown is turned, and when the crown is pulled out allow the hands to be set. [ 8 ] [ 9 ] The term originated because, before the modern form of keyless works was invented by the French watchmaker Adrien Philippe in 1843, watches were wound and set by inserting a ...
Watch movements require regular cleaning and lubrication, and the normal result of neglecting to get a watch cleaned is a watch stopped at full wind. As the watch movement collects dirt and the oil dries up, friction increases, so that the mainspring doesn't have the force to turn the watch at the end of its normal running period, and it stops ...
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These watches were called jerking watches because, even with buffers, when the weight hit the case the whole watch would jerk. Center-weight The weight pivots in the center of the movement and rotates clockwise and anti-clockwise. The weight is supported by a bridge that blocks the rotation and it is limited to about 180°. [15]
Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.
In watch movements the wheels and other moving parts are mounted between two plates, which are held a small distance apart with pillars to make a rigid framework for the movement. One of these plates, the front plate just behind the face, is always circular, or the same shape and dimensions as the movement.