A lever escapement is an escapement by means of a stone anchor with pallets. This principle has been invented around 1715 by the English watchmaker George Graham. A further development of the so-called free anchor escapement, also called Swiss lever escapement, was invented in 1765 by Thomas Mudge and is used today in nearly all mechanical wristwatches.
Functional description: The escape wheel gives the anchor an impulse to move. While one end is driven forward, the other end engages into the teeth of the gear wheel. This creates a permanent movement - comparable with a rocker.
Types of anchor escapement:
- English pointed tooth lever escapement
- Glashütte escapement
- Swiss lever escapement