lever escapement


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lever escapement

[′lev·ər is‚kāp·mənt]
(horology)
A clock movement in which the balance wheel is connected to the escapement by a lever attached to a roller; the wheel swings through a much larger angle than does a pendulum.
References in periodicals archive ?
A conventional Swiss lever escapement is composed of wheels, springs, pallets, and bearings made from tried-and-tested materials such as steel and synthetic ruby.
technological advances during the 18th century saw the introduction of the cylinder escapement and the spring detent escapement by Arnold and Earnshaw with a bimetallic compensation balance, but the lever escapement developed by Thomas Mudge proved to be the most valuable asset to the watch-making industry of the time.
This state-of-the-art timepiece, made by Joseph Emery of Charing Cross around 1797, has the revolutionary lever escapement that is the foundation of every mechanical watch to this day.