发明名称 |
Two entry door bell having motor/coil with moving central section/outer strips with one door bell sound modification changing force frequency magnetic field applied. |
摘要 |
The two entry door bell has a motor (8) and coil (10) with a moving central section (12) and two outer strips (4,6). Each button push sounds the bell. A unit (16) modifies the frequency of the force set up by the applied magnetic field.
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申请公布号 |
FR2813688(A1) |
申请公布日期 |
2002.03.08 |
申请号 |
FR20000011272 |
申请日期 |
2000.09.05 |
申请人 |
LEGRAND |
发明人 |
HOPFNER GILBERT;GUILMONT SEBASTIEN |
分类号 |
G08B3/10;(IPC1-7):G08B3/10 |
主分类号 |
G08B3/10 |
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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