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Video of the rotor turning in an automatic wristwatch having a glass back, when the watch is moved by hand. An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. [1]
A "watch brand" is often—but incorrectly—used as a synonym of "watch manufacturer" or "watchmaker".Brands are distinct from manufacturers. There are brands of watches that are purely marketing constructs and are not associated with a specific company.
John Harwood (1893–1965), English inventor and clockmaker, automatic wrist watch, Fortis watch brand. Rasmus Sørnes (1893–1967), Norwegian radio technician and clockmaker, Sola, astronomical clock. Paul Behrens (1893–1984), German clockmaker, Lübeck, astronomical clock.
Perrelet is thus widely acknowledged as the inventor of the "automatic" watch. However, his watch probably used a weight pivoting at the side of the movement. The first drawing and accurate description of an automatic watch with a central rotor was created in 1778 by the watchmaker Hubert Sarton and that design is attributed to him. Following ...
Automatic quartz is a collective term describing watch movements that combine a self-winding rotor mechanism [1] (as used in automatic mechanical watches) to generate electricity with a piezoelectric quartz crystal as its timing element. Such movements aim to provide the advantages of quartz without the inconvenience and environmental impact of ...
In watches and some high quality clocks their arbors have jewel bearings. The going train in a modern clock or watch consists of: First or great wheel attached and ratcheted to the main spring, or cable, barrel. The ratchet allows the main spring or cable barrel to be wound without turning the wheel.
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