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Lexicon article of the week
Schwing- and escapement system
The oscillating system consists of the back and forth swinging balance wheel  on the balance staff, the balance spring  and an apparatus for rate regulation, often called regulator. Hereby the oscillation of the balance spring can be precisely adjusted, so that the desired correct rate of the watch can be attained.
The exact rate is based on the maximum possible uniformity of the back-and-forth oscillation of the balance wheel , which must also be balanced as accurately as possible.
Without a steady, precise dosed energy supply this regulated organ however would cease to move. Therefore, it is constantly fed by the force coming from the barrel and via the gear train , in accordingly reduced doses …
Oscillating system of a mechanical watch
- Abraham-Louis Breguet Most important watchmaker in the history of horology and a great inventor