| 发明名称 |
Reduced friction watch cannon shafts |
| 摘要 |
An otherwise conventional watch is provided with an additional bearing element to reduce friction between two coaxial tubes that carry the minute hand and the hour hand respectively. The bearing may be located between the two tubes or outside the outer tube.
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| 申请公布号 |
US3885382(A) |
申请公布日期 |
1975.05.27 |
| 申请号 |
US19740458813 |
申请日期 |
1974.04.08 |
| 申请人 |
SOCIETE SUISSE POUR L'INDUSTRIE HORLOGERE MANAGEMENT SERVICES S.A. |
发明人 |
HETZEL, MAX;KOCHER, HANS |
| 分类号 |
G04C3/14;G04B19/02;G04B31/00;G04B33/10;(IPC1-7):G04B13/02 |
主分类号 |
G04C3/14 |
| 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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