发明名称 |
Piezomembrane constrained in the center and its employment to provide an acoustic howler. |
摘要 |
<p>A piezoelectrictric transducer device with a piezomembrane coupled, by means of a central pin, to a loading plate, which in turn is constrained on its external circumferance, is employed to provide an acoustic howler in which the loading plate is integrant part of the howler casing. <IMAGE></p> |
申请公布号 |
EP0582557(A2) |
申请公布日期 |
1994.02.09 |
申请号 |
EP19930830348 |
申请日期 |
1993.08.03 |
申请人 |
IMAPO S.R.L. |
发明人 |
BRACHI, MASSIMO;LAMBERTI, NICOLA;PAPPALARDO, MASSIMO |
分类号 |
G10K9/122;(IPC1-7):G10K9/12 |
主分类号 |
G10K9/122 |
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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