Gear train e.g. finishing gear train, for watch, has toothed elements provided with gear teeth, where each tooth is composed of N coaxial toothed rings that are angularly offset with respect to each other by fraction of pitch of teeth

摘要

The gear train has a set of circular toothed elements e.g. mobile (25) and central mobile (31), provided with respective driving and driven gear teeth that are mutually engaged together such that the central mobile is driven by the mobile that is provided with a wheel (27). Each gear tooth is composed of N coaxial toothed rings (28a, 28b, 30a, 30b) that are angularly offset with respect to each other by a fraction of pitch of the teeth.