It seems that something was created in 1916?
commonly used escapement today in wrist watches. Is was was supposedly invented in 1657 by Robert Hook although some references credit William Clement. The anchor is a steel lever with two limbs, called pallets, rotating about a pivot shaft. The two pallets have impulse faces that interact with the escape wheel’s teeth.
What exactly is an escapement?
The energy constantly transmitted by the mainspring must be divided up into regular units in order to be able to count out time.
The escapement transforms the energy thus received into impulses. If this organ were not present, the wheels would turn to fast and the mainspring would be unwound in a few seconds.
The escapement constitutes the link with the regulating organ and distributes the impulses to the balance. The pallet-lever (known in French as “l’ancre” because of its resemblance to a ship’s anchor thus its name) receives the energy initially provided by the mainspring through the impulses of the pallet-wheel. The role of the pallet-lever is to transform the circular movement of the wheel into an alternating movement to drive the balance. It performs a rocking movement corresponding to the tick and tock sounds heard when a mechanical watch is running:
Here is a image of the way the anchor escapement works (images courtesy of horlogerie-suisse.com)