Air powered civil defense siren
    3.
    发明授权
    Air powered civil defense siren 失效
    空中民防警笛

    公开(公告)号:US07793607B1

    公开(公告)日:2010-09-14

    申请号:US12151396

    申请日:2008-05-06

    CPC classification number: G08B3/10

    Abstract: A civil defense air powered siren includes an air powered tone generator, a compressed air tank, an air compressor, an air line with a control valve connecting between the compressed air tank and the tone generator. A pressure switch communicates with the compressor and the compressed air tank. The pressure switch activates the compressor to charge the compressed air tank when air pressure in the tank falls below a pre-selected limit. The control valve is remotely controlled preferably by a radio signal to cause the control valve to open the air line and supply the tone generator with air in order to cause a civil defense warning tone to be generated when it is appropriate to do so.

    Abstract translation: 民防空气警报器包括空气压力发生器,压缩空气罐,空气压缩机,连接在压缩空气箱和音调发生器之间的控制阀的空气管路。 压力开关与压缩机和压缩空气罐连通。 当空气压力低于预先设定的极限时,压力开关启动压缩机对压缩空气罐充电。 控制阀优选地通过无线电信号进行远程控制,以使得控制阀打开空气管线并向空气提供音调发生器,以便在适当时产生民防警告音。

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