escapement error

noun

, Horology.

1. loss of isochronism in the movement of a pendulum as a result of its relation to the escapement.

Example Sentences

It is unfortunately impossible so to arrange the pallets that the circular error may be thus exactly neutralized, because the escapement error depends, in a manner reducible to no law, upon variations in friction of the pallets themselves and of the clock train, which produce different effects; and the result is that it is impossible to obtain very accurate time-keeping from any clock of this construction.

From Project Gutenberg