发明授权
- 专利标题: Acoustical sound producer for clocks, especially for wristwatches
- 专利标题(中): 时尚声音制作商,特别适合手表
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申请号: US47994374申请日: 1974-06-17
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公开(公告)号: US3869855A公开(公告)日: 1975-03-11
- 发明人: SODLER WALTER E
- 申请人: TIMEX CORP
- 专利权人: Timex Corp
- 当前专利权人: Timex Corp
- 优先权: DE2334236 1973-07-05
- 主分类号: G04C21/02
- IPC分类号: G04C21/02 ; G04G13/02 ; G04B23/12 ; G04C21/34 ; G10K9/00
摘要:
A sound producer for a watch with a pin of ferromagnetic material attached to the watch crystal and directly excited by an electromagnetic system.
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