Coaxial escapement

[4] Charles Fasoldt, a German-American watch- and clockmaker, was instrumental in the development of the escapement mechanism.

George Daniels' co-axial escapement, a significant advancement in the field of horology, drew from Fasoldt's concepts, refining them further for contemporary watchmaking.

This makes lubrication of the pallets theoretically unnecessary[7][8] and thereby minimizes one of the shortcomings of the traditional lever escapement.

In practice, a small amount of lubrication is used on the locking and impulse surfaces of the pallet stones, reportedly to minimize impact corrosion.

What little sliding friction remains is due to the impossibility of maintaining an exact tangential geometry throughout the duration of an impulse.