Assertion: clock's use | /r/CapableOf | spread to most quality pendulum clocks
Facets:
value: during the 19th century
type: TEMPORAL
Source sentences:
text: The deadbeat form of the anchor escapement is less tolerant of inaccuracy in its manufacture or wear during operation and was initially used only in precision clocks, but its use spread during the 19th century to most quality pendulum clocks.