Going barrel

(Horology)

A barrel containing the mainspring, and having teeth on its periphery to drive the train.

A device for maintaining a force to drive the train while the timepiece is being wound up.

going barrel

[′gō·iŋ ‚bar·əl] (horology) A mainspring barrel with a toothed edge for driving the train; it is mounted on an arbor that is stationary except while the timepiece is being wound.

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