Referring to the escapement, an impulse is the motion of the escape wheel’s tooth on the impulse-side of a pallet.
The most common type of shock absorption used in mechanical movements. It’s a spring-loaded shock absorption system with a flat spring holding a jewel over the balance wheel staff to allow for it to shift under shocks and jolts without breaking.
Indicates an hour on an analog watch dial, usually in lieu of a numeral.
Plural of index, indicates the hours on an analog watch dial (sometimes used alongside numerals).
The maintaining of a consistent/constant oscillation of a balance or pendulum, regardless of the power shifts from its energy source. This is the requisite for accuracy.