The Click

Reference no 425

The figure shows the Click (425). When the movement is wound, the rotation of the barrel arbor makes the spring tighten around it while a slot at the inner end of the spring is locked to the arbor hook. To prevent the spring from unwinding in the reverse direction, the ratchet wheel is locked by the click.

In the figure above it can be seen how the Click (430) interacts with, and locks, the Ratchet Wheel preventing the Mainspring from unwinding in an uncontrolled way. The figure also shows the Crown Wheel (420) and the Crown Wheel Ring (422) in place. The latter is a washer allowing the Crown Wheel to rotate freely as an intermediate power transferring wheel.

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