Optic rotation mechanism

2-4-035

No English Term

The mechanism which rotates the optic or revolving screen in a flashing or occulting light.

Note: The terms Lens Clock and, in French, Machine de Rotation a Poids refer to such a mechanism when driven by a falling weight.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English