发明名称 |
Horn body and horn having such a horn body. |
摘要 |
<p>An electromagnetic horn, has a dished body (10) containing a coil (11), an armature (12), and a make-and-break mechanism 14. The body (10) has an integral flange (17) to which a diaphragm (13) is secured in surface-to-surface contact by an aluminium clamping ring (18). The horn has pleasant tonal characteristics because it is formed of a non-alloy steel having nitrogen diffused therein so as to be in solid solution in a ferritic matrix and also has an epsilon iron nitride surface layer. Part of the layer is porous and contains oil with the result that it has a high corrosion resistance. The good tribological properties of the epsilon iron nitride layer enable the usual paper gasket between the diaphragm (13) and the flange (17) to be dispensed with.</p> |
申请公布号 |
EP0052975(A1) |
申请公布日期 |
1982.06.02 |
申请号 |
EP19810305315 |
申请日期 |
1981.11.10 |
申请人 |
LUCAS INDUSTRIES PUBLIC LIMITED COMPANY |
发明人 |
HIBELL, ERNEST GEORGE;DAWES CYRIL |
分类号 |
G10K9/15;G10K9/18;(IPC1-7):10K9/18 |
主分类号 |
G10K9/15 |
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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