Mechanism that controls the spring release, thereby regulating the oscillations of the pendulum.
fixed weight
Counterbalance of the pendulum; its back and forth movement triggers a clacking sound.
pivot
Stem on which the wheels of the spring mechanism turn.
sliding weight
Adjustable weight that is moved along the pendulum bar to regulate the frequency of the beats.
tempo scale
Scale calibrated to a number of beats per minute (40 to 208) and used to match the tempo of a given piece of music (adagio, allegro, vivace and so forth).
pendulum bar
Metal rod that oscillates from one side of an axis to the other to produce a sound signal.
case
key
Part that rewinds the mechanism, consisting of a series of wheels.
