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    Multi-element ionization chamber
    24.
    发明授权
    Multi-element ionization chamber 失效
    多元素电离室

    公开(公告)号：US4012729A

    公开(公告)日：1977-03-15

    申请号：US588153

    申请日：1975-06-19

    Applicant: Stephen Weaver ,  Lyman L. Blackwell ,  Paul A. Staby

    Inventor： Stephen Weaver ,  Lyman L. Blackwell ,  Paul A. Staby

    IPC: G01N27/64 ,  G08B17/10 ,  G08B17/11 ,  H01J41/08

    CPC classification number: H01J41/08 ,  G08B17/11

    Abstract: A fire alarm system utilizes an ionization type aerosol detector having first and second intercommunicating and electrically in series ionization regions or chambers irradiated by a particle source. Electrodes are provided which operate in conjunction with a DC voltage source to establish a relatively large voltage gradient across the first region and a relatively small voltage gradient in the second region. Also, the location of the ion source and the effective volumes of the regions are arranged to establish a comparatively high ion density in the first region. In operation, the impedance or resistance of the first region to ion current flow is substantially uninfluenced by the presence of combustion or smoke aerosols due to the relatively high field gradient while the impedance or resistance of the second region is measurably changed thereby. The insensitivity of the first region to the presence of smoke is due to the high voltage gradient therein, as well as to the high ion density therein. The detector operates by the method of employing the second region as a signal or sensing ion chamber and the first region as a reference chamber, thereby to develop electrical signals on the electrodes representative of detected smoke aerosols for driving the associated fire alarm circuitry. The ion collecting electrode in the second region defines a sensing volume which communicates with the surrounding atmosphere to be monitored and which is located at the optimum distance from the particle source to maximize ion production and collection.

    Abstract translation: 火灾报警系统利用电离型气溶胶检测器，其具有由粒子源照射的第一和第二相互连通且电串联电离区域。 提供电极，其与直流电压源一起工作，以在第一区域上建立相对较大的电压梯度，并在第二区域中建立相对较小的电压梯度。 此外，离子源的位置和区域的有效体积被布置成在第一区域中建立比较高的离子密度。 在操作中，由于相对高的场梯度，第一区域对离子流的阻抗或电阻基本上不受燃烧或烟雾气溶胶的存在的影响，同时第二区域的阻抗或电阻由此可测地改变。 第一区域对烟雾存在的不敏感性是由于其中的高电压梯度以及其中的高离子密度。 检测器通过采用第二区域作为信号或感测离子室并且第一区域作为参考室的方法进行操作，从而在代表检测到的烟雾气溶胶的电极上形成电信号，用于驱动相关的火灾报警电路。 第二区域中的离子收集电极限定感测体积，其与待监测的周围环境连通，并且位于距粒子源最佳距离处以最大化离子产生和收集。

    Ionization chamber in particular for a fire detection device
    26.
    发明授权
    Ionization chamber in particular for a fire detection device 失效
    特别是用于消防设备的离子室

    公开(公告)号：US3792254A

    公开(公告)日：1974-02-12

    申请号：US3792254D

    申请日：1971-07-15

    Applicant: VIGIFEU

    Inventor： LECUYER D

    IPC: G08B17/113 ,  H01J41/08 ,  G01T1/18

    CPC classification number: G08B17/113 ,  H01J41/08

    Abstract: An ionization detection chamber, in particular for a fire detecting apparatus, of the type comprising an ionizing source and two electrodes each of which constitutes an ion collecting electrode of a given sign. In order to minimize the variation of the ion collection current when the surrounding pressure increases, the chamber further comprises at least one ion collecting member integral with one of the electrodes, said collecting member extending towards the ionizing source in the radiation beam of the latter.

    Abstract translation: 特别是用于火灾检测装置的电离检测室，包括电离源和两个电极，每个电极构成给定符号的离子收集电极。 为了最小化当周围压力增加时离子收集电流的变化，腔室还包括与电极之一成一体的至少一个离子收集构件，所述收集构件朝向后者的辐射束中的电离源延伸。

    Directional ion anemometer
    27.
    发明授权
    Directional ion anemometer 失效
    方向离子电位器

    公开(公告)号：US3706938A

    公开(公告)日：1972-12-19

    申请号：US3706938D

    申请日：1971-03-10

    Applicant: US ARMY

    Inventor： PETRIW ANDREW

    IPC: G01P5/00 ,  H01J41/08

    CPC classification number: H01J41/08 ,  G01P5/006

    Abstract: This disclosure relates to anemometers and particularly to ion anemometers. More particularly, this disclosure relates to a directional, ion anemometer where an alpha nuclear radiation source is positioned between two electrodes of opposing polarity in a balanced electrical field. The ion cloud concentration generated by the radiation source is changed by motion of the air to cause a differential voltage or current, between the source and the electrodes, proportional to the wind velocity.

    Abstract translation: 本公开涉及风速计，特别涉及离子风速计。 更具体地，本公开涉及一种定向离子风速计，其中α核辐射源位于平衡电场中具有相反极性的两个电极之间。 由辐射源产生的离子云浓度由于空气的运动而改变，导致源极和电极之间的差分电压或电流与风速成比例。

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