Amant escapement
The Amant escapement (also pin-locking or pin gear , scissors inhibition , Mannhardt inhibition ) is a stationary scissor escapement for clocks . It was invented in 1741 by the French clockmaker Louis Amant in Paris.
In contrast to the usual lever escapement, the escapement wheel has no teeth, but steel pins arranged parallel to the axis, in which the armature engages. The anchor is shaped like a scissor and is connected to the pendulum. The construction was improved in 1753 by Jean André Lepaute by filing the originally round steel pins flat on one side, lengthening the armature arms and increasing the center distance between the escape wheel and armature.
The Amant escapement has a smooth gear and low demands on the drive torque. It was mainly used in France, e.g. B. from 1800 on the Comtoise watches , where it was able to surpass the spindle and lever escapement in accuracy.
The scissor escapement was often installed in tower clocks , where it is characterized by its robust, simple construction and high accuracy.
In Germany, the scissor escapement is usually named Mannhard escapement or Mannhardtgang after the Munich clockmaker Johann Mannhardt , who used it in many tower clocks.
Web links
Individual evidence
- ^ GH Baillie: Watchmakers & Clockmakers of the World. ISBN 978-1-4067-9113-6 .
- ↑ Fritz von Osterhausen: Callweys lexicon. Callwey 1999, ISBN 3-7667-1353-1 , p. 13
- ^ Bassermann-Jordan / Bertele: Uhren , Verlag Klinkhardt & Biermann, Braunschweig 1969, p. 180
- ^ Gustav Schmitt: Die Comtoiser Uhr , Verlag Müller, 1977, ISBN 3-920662-02-4 , p. 223ff.
- ↑ Curt Dietzschold: The tower clocks, including the so-called art clocks. , Bernhard Friedrich Voigt, Weimar 1894, p. 92ff.