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automatic [11.10.2021 17:01]
127.0.0.1 external edit
automatic [19.10.2021 11:09] (current)
gerdlothar
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 ===== Technology ===== ===== Technology =====
 {{wst>image_r|Bidynator_Werk_Expl|Technical drawing of the Bidynator movement|290px}} {{wst>image_r|Bidynator_Werk_Expl|Technical drawing of the Bidynator movement|290px}}
 +
 ==== Bumper winding ==== ==== Bumper winding ====
 Many early automatic winding systems did not rotate freely 360 degrees. Instead, the weight segment rotated a shorter distance before reaching a spring and a stop at each end. These so-called "bumper" or "hammer" winding systems were functional but produced an odd feeling on the wrist. Although they were widely produced in the 1950's, they quickly fell out of vogue and were replaced by freely-rotating winding mechanisms once patents expired. By the late 1960's, no more bumper automatics were produced. Many early automatic winding systems did not rotate freely 360 degrees. Instead, the weight segment rotated a shorter distance before reaching a spring and a stop at each end. These so-called "bumper" or "hammer" winding systems were functional but produced an odd feeling on the wrist. Although they were widely produced in the 1950's, they quickly fell out of vogue and were replaced by freely-rotating winding mechanisms once patents expired. By the late 1960's, no more bumper automatics were produced.
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 Throughout the 1960's, a competition developed to deliver the first automatic [[chronograph]] movement. The [[El Primero]] by [[Zenith]]/[[Movado]] (with a [[central rotor]]) was first to market in [[1969]], followed just 60 days later by the [[micro-rotor]] [[Chronomatic]] from [[Breitling]]/[[Heuer]] (Calibre 11). Seiko also delivered their automatic [[Seiko 6139|6139]] chronograph in 1969, and the [[Lemania 5100]] and popular [[Valjoux 7750]] followed in 1973 and 1974, respectively. Throughout the 1960's, a competition developed to deliver the first automatic [[chronograph]] movement. The [[El Primero]] by [[Zenith]]/[[Movado]] (with a [[central rotor]]) was first to market in [[1969]], followed just 60 days later by the [[micro-rotor]] [[Chronomatic]] from [[Breitling]]/[[Heuer]] (Calibre 11). Seiko also delivered their automatic [[Seiko 6139|6139]] chronograph in 1969, and the [[Lemania 5100]] and popular [[Valjoux 7750]] followed in 1973 and 1974, respectively.
  
-Today, there are {{tagpage>Automatic_chronograph_movements|Automatic_chronograph_movements}} on the market.+Today, there are many {{tagpage>Automatic_chronograph_movements|Automatic_chronograph_movements}} on the market.
  
 ==== Hand winding automatic movements ==== ==== Hand winding automatic movements ====
automatic.txt · Last modified: 19.10.2021 11:09 by gerdlothar

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