the world > time > instruments for measuring time > clock > [verb (intransitive)] > perform or fail (of parts) (3)
intransitive. Of an escapement or one of its parts: To perform its function (in a certain manner).
Horology. Of an escape-wheel: To fail to release itself from the pallet; see also quot. 1850 at tripping, n. 2a.
intransitive. Watchmaking and Clockmaking. To bank (bank, v.1 8) too far. Obsolete.