Nucleonic measuring apparatus
    4.
    发明授权
    Nucleonic measuring apparatus 失效
    核子测量仪器

    公开(公告)号:US3875417A

    公开(公告)日:1975-04-01

    申请号:US1477470

    申请日:1970-02-26

    CPC classification number: G01N23/16 G21F5/04

    Abstract: A nucleonic measuring instrument wherein a housing contains a radiation source and has an aperture controlled by a shutter which is spring loaded to a closed position for confining and shielding the radiation and is movable by a motor to an open position for releasing the radiation, the motor being supplied with power through a heat sensitive element so that it is deenergized and the shutter closes in response to a predetermined high ambient temperature such as may be caused by a fire, and including an explosive blank cartridge positioned in relation to the shutter guide which explodes in response to a still higher ambient temperature, deforming the guide and thereby locking the shutter in the closed position.

    Abstract translation: 一种核测量仪器,其中壳体包含辐射源并且具有由快门控制的孔径,弹簧被弹簧加载到关闭位置以限制和屏蔽辐射,并且可通过电动机移动到用于释放辐射的打开位置,马达 通过热敏元件供电,使得它被断电,并且快门响应于诸如可能由火灾引起的预定的高环境温度而关闭,并且包括相对于快门引导件定位的爆炸性空白盒,其爆炸 响应于较高的环境温度,使引导件变形,从而将快门锁定在关闭位置。

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