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    Process for producing fritted alumina members
    2.
    发明授权
    Process for producing fritted alumina members 失效
    生产烧结氧化铝部件的方法

    公开(公告)号：US4364877A

    公开(公告)日：1982-12-21

    申请号：US228896

    申请日：1981-01-27

    申请人： Rene Clement ,  Francis Gugliermotte

    发明人： Rene Clement ,  Francis Gugliermotte

    IPC分类号： C04B35/115 ,  C04B35/64 ,  H01J61/30 ,  C04B35/44

    CPC分类号： C04B35/115 ,  C04B35/64

    摘要： A process for producing fritted alumina members having a high optical transparency and a high mechanical strength of the type involving the production of the members from a high purity alumina powder to which has been added an organic binder and a small percentage of oxide, particularly of magnesium and/or rare earth, followed by the shaping thereof and subjecting them to two successive heat treatments, namely a first treatment in an oxidizing atmosphere to remove the binder and consolidate the particles and a second treatment at a higher temperature and in a hydrogen-rich atmosphere for obtaining fritting, wherein the second heat treatment takes place by continuously passing the said members through a kiln kept at a temperature between 1820.degree. and 1970.degree. C. at a constant translation speed between 3 and 50 millimeters per minute, the total time necessary for firing a member from the consolidated or slightly warm state up till its return to ambient temperature varying from approximately 30 minutes to a maximum of 5 hours.

    摘要翻译： 一种制备具有高光学透明度和高机械强度的烧结氧化铝构件的方法，该方法涉及由高纯度氧化铝粉末制备成分的类型，其中添加了有机粘合剂和少量的氧化物，特别是镁 和/或稀土，然后进行成型，然后进行两次连续热处理，即在氧化气氛中进行第一次处理以除去粘合剂并固化颗粒，并在较高温度和富氢条件下进行第二次处理 用于获得烧结的气氛，其中第二热处理是通过将所述构件连续地通过保持在1820℃和1970℃之间的窑炉以3至50毫米/分钟之间的恒定的转换速度连续通过的，所需的总时间 用于从合并或稍微温暖的状态发射一个成员，直到其返回到从近似变化的环境温度 可以30分钟到最多5小时。

    DC electromagnet equipped with a voltage surge damping device
    4.
    发明授权
    DC electromagnet equipped with a voltage surge damping device 失效
    直流电磁铁配有电压浪涌阻尼装置

    公开(公告)号：US4700165A

    公开(公告)日：1987-10-13

    申请号：US748387

    申请日：1985-06-25

    申请人： Alain Brisson ,  Jean-Rene Clement

    发明人： Alain Brisson ,  Jean-Rene Clement

    IPC分类号： H01F7/06 ,  H01F7/12 ,  H01H50/16 ,  H01H50/36 ,  H01H50/46 ,  H01F7/10

    CPC分类号： H01H50/46 ,  H01F7/1205 ,  H01H50/163

    摘要： A voltage surge damping device for electromagnets is provided which applies more particularly to electromagnets of the type comprising a fixed magnetic circuit and a mobile magnetic circuit cooperating with the fixed magnetic circuit and forming therewith, in the "closed" position, at least one air gap. Said device comprises at least one short circuiting ring mounted on the fixed magnetic circuit and formed by a good electrically conducting and a magnetic metal sheet, and having at least one part shaped so as to extend into said air gap.

    摘要翻译： 提供了一种用于电磁体的电压浪涌阻尼装置，其更具体地涉及包括固定磁路和与固定磁路配合并与其成形的移动磁路类型的电磁体在“关闭”位置，至少一个气隙 。 所述装置包括安装在固定磁路上并由良好的导电和磁性金属片形成的至少一个短路环，并且至少有一个部件成形为延伸到所述气隙中。