Anchor (clock)

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The anchor (synonymous with hook ) is part of the anchor escapement , which in gear clocks establishes the connection between the gear train and the regulator . The first lever escapement was invented by Robert Hooke in 1676 and further developed in 1680 by the English watchmaker William Clement for use in large clocks .

The anchor is one of the most stressed components of the wheel clocks, as both sliding friction and shock loads through inhibition and lifting take place on it. Therefore, the contact surfaces for the Swiss pallet anchor escapement or the Glashütte pallet anchor escapement (both piston tooth escapements ) are equipped with pallet stones (synonym anchor claw, anchor stone, lifting stone or lifting stone) made of rubies or other corundum to reduce wear .

The ticking of the clock is caused by the clash between the teeth of the escape wheel and the two teeth of the armature (or its pallets).

photos

  • Anchors in pendulum clocks

  • Anchor in small watches with balance

  • Principle of the lever escapement

  • Model of the Swiss lever escapement

Individual evidence

  1. ↑ Fritz von Osterhausen: Callweys lexicon. Callwey, Munich 1999, ISBN 3-7667-1353-1 , p. 16.

literature

  • Otto Böckle, Wilhelm Brauns: Textbook for the watchmaking trade. Work skills and materials. 8-10 Edition. Wilhelm Knapp, Halle (Saale) 1951 (reprint, edited by Michael Stern. Heel, Königswinter 2010, ISBN 978-3-86852-288-4 ).
  • Hermann Brinkmann: Introduction to watchmaking (= The watchmaking school. Vol. 2). 10th unchanged edition. Wilhelm Knapp, Düsseldorf 2005, ISBN 3-87420-010-8 .
  • George Daniels : Watchmaking. Updated 2011 edition. Philip Wilson Publishers, London 2011, ISBN 978-0-85667-704-5 .