| 摘要 |
A horological instrument such as a watch includes an indexing mechanism or dial train drive for transmitting power from an oscillating balance wheel to an index wheel. The index wheel drives the gear train of a watch. The balance wheel oscillates a lever between two end positions and one or more pins mounted on the lever step the index wheel in a predetermined direction under the influence of a drag spring. Detenting of the index wheel is accomplished by the drag spring which engages the multi-toothed drag disk mounted on the index wheel.
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