| 摘要 |
The invention relates to a mechanical timepiece with a jumping second hand ( 16 ), consisting of a barrel, a first gear train which is driven by the barrel and which comprises a minute wheel ( 54 ) and a second wheel ( 30 ), an escapement which is actuated by the gear train and a regulating element, the oscillations of said regulating element being maintained by the escapement. Moreover, the aforementioned escapement comprises an escapement wheel ( 32 ) which performs a revolution in 4 seconds by means of jumps. For the purpose of the jumping second function, the inventive piece comprises a second gear train, the first mobile ( 34 ) thereof being mounted to the arbor of the escapement wheel ( 32 ) and the last mobile ( 48 ) of same being mounted to the arbor bearing the hand ( 16 ).
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