| 发明名称 |
Gear train for a wrist watch |
| 摘要 |
In the gear train of a wrist watch a jewel mounted on the lower side of a gear wheel connected to the second hand engages the enlarged upper end of the center pipe. The friction factor between the gear wheel and the center pipe is thereby reduced and the performance of the watch is improved.
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| 申请公布号 |
US4074517(A) |
申请公布日期 |
1978.02.21 |
| 申请号 |
US19760705006 |
申请日期 |
1976.07.14 |
| 申请人 |
KABUSHIKI KAISHA DAINI SEIKOSHA |
发明人 |
TATSUMI, YOSHIO;KADOWAKI, TOORU |
| 分类号 |
G04B13/02;G04B19/02;G04B31/00;G04B33/10;(IPC1-7):G04B13/02 |
主分类号 |
G04B13/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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