GONG
Définition
The gong is a disc of metal which, when struck, produces a powerful sound comparable to that of a bell.
In watchmaking
In striking clocks, gongs are hollow or solid cylinders, made of steel or bronze, embedded in a block of metal. A hammer strikes them to produce the sound.
Circular gong
The circular gong is an iron wire wound into a spiral. Its length determines the pitch of the sound: the longer it is, the deeper the sound.
Straight gong
The straight gong produces a more powerful and fuller sound, also depending on its length. It traditionally equips large striking clocks.
Fastening
The gong is fastened at a single point, leaving the rest of its length to vibrate freely. This fastening directly determines the quality and range of the sound produced.
Gong and chime
In pocket or wrist watches, the chime is used rather than the gong, the latter being reserved for larger clocks and pendulum clocks.
See also
For the associated striking mechanisms, see Clock strikes and Minute repeater.
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