Definitions for "BALANCE SPRING"
a weak spiral spring attached at its inner end to the balance staff and at its outer end to the balance cock or movement plate
Sometimes called a hairspring, a balance spring controls the oscillations of a watch's balance wheel.
An extremely fine, coiled spring that is part of a watch regulating mechanism. Also known as a hairspring.
Device for counterbalancing a sliding sash, usually associated with a double-hung window, so sash may be held open at any given position.