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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]
Radio-controlled watches require no setting of time and date, or daylight saving time adjustments, as they attempt automatic synchronization several times every night. [1] Without synchronisation, Wave Ceptors, like other commercial quartz timepieces, are typically accurate to ± 15 seconds per month; daily synchronization ensures 500 ms accuracy.
A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
Illustration attached to Meylan's automatic module patent [6]. With the original patent for self-winding watches set to expire in the early 1930s, [3] Meylan (founder of Glycine but no longer affiliated with the company) began working on his own self-winding mechanism and formed the company Automatic E.M.S.A. (Eugène Meylan Société Anonyme).
Whereas a mechanically-wound watch must be wound with the pendant or a levered setting, an automatic watch does not need to be wound by the pendant; simply rotating the watch winds the watch automatically. The interior of an automatic watch houses a swiveling metal or brass "plate" that swivels on its axis when the watch is shaken horizontally ...
Fortis was founded by Walter Vogt in 1912. Twelve years after its establishment, Vogt set up production with John Harwood, inventor of the automatic wristwatch.In 1926, Fortis released the patented Harwood Automatic, the first self-winding wristwatch, at Baselworld.
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