| 摘要 |
The program wheel (200) has a principal wheel (204) and a twenty four hour wheel (13). The principal wheel carries two toothed wheels (210,211) and a sliding plate (212) in order to advance the program wheel by one to three steps on the last day of a month of less than thirty one days. These toothed wheels are activated by a fixed wheel (203) and the sliding plate by four satellite wheels (228,229,230,231) An Independent claim is also included for : A timepiece which uses the program wheel mechanism.
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