利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

125 条记录 (耗时 0.017 秒)

    CT scanner
    95.
    发明授权
    CT scanner 有权
    CT扫描仪

    公开(公告)号：US07440547B2

    公开(公告)日：2008-10-21

    申请号：US11402845

    申请日：2006-04-13

    申请人： Fumio Ishiyama

    发明人： Fumio Ishiyama

    IPC分类号： H05G1/10 ,  H05G1/22 ,  H05G1/00

    CPC分类号： H05G1/30 ,  A61B6/032 ,  A61B6/4014 ,  H01J23/065 ,  H01J35/045

    摘要： A CT scanner which collects X-ray projection data of a subject and which generates an image in the subject from the projection data, the CT scanner includes tubes which emit X-rays and which include grids to switch emission and stoppage of the X-rays, a unit which generates a high voltage to be supplied to the tubes, a cable which sends the high voltage to each of the tubes, circuits which change potentials of the grids arranged in the tubes, respectively, a control unit which controls the circuits to switch the emission and the stoppage of the X-rays in a pulse manner while the tubes rotate around the subject, detectors arranged to face the tubes, respectively, and a unit which validates an output signal from the detector facing the tube emitting the X-rays and which invalidates an output signal from the detector facing the tube stopping the emission of the X-rays.

    摘要翻译： 一种CT扫描器，其收集被摄体的X射线投影数据并从投影数据生成被摄体中的图像，CT扫描器包括发射X射线的管，其包括用于切换X射线的发射和停止的网格 产生向管供给的高电压的单元，分别向每个管发送高压的电缆，改变设置在管中的电网的电位的电路，控制单元，其控制电路 当管绕着被摄体旋转时，以脉冲方式切换X射线的发射和停止，分别布置成面对管的检测器和用于验证来自检测器的输出信号的单元，所述检测器面向发射X射线的管的输出信号， 并且使来自检测器的输出信号无效，所述检测器面向管阻止X射线的发射。

    Electron gun for a multiple beam klystron using magnetic focusing with a magnetic field corrector
    96.
    发明授权
    Electron gun for a multiple beam klystron using magnetic focusing with a magnetic field corrector 失效
    电子枪用于多波束速调管，使用磁场校正器进行磁场聚焦

    公开(公告)号：US06847168B1

    公开(公告)日：2005-01-25

    申请号：US09629364

    申请日：2000-08-01

    申请人： R. Lawrence Ives ,  George Miram

    发明人： R. Lawrence Ives ,  George Miram

    IPC分类号： H01J23/065 ,  H01J23/087 ,  H01J25/02 ,  H01J25/10

    CPC分类号： H01J23/065 ,  H01J25/10

    摘要： An RF device comprising a plurality of drift tubes, each drift tube having a plurality of gaps defining resonant cavities, is immersed in an axial magnetic field. RF energy is introduced at an input RF port at one of these resonant cavities and collected at an output RF port at a different RF cavity. A plurality of electron beams passes through these drift tubes, and each electron beam has an individual magnetic shaping applied which enables confined beam transport through the drift tubes.

    摘要翻译： 包括多个漂移管的RF装置，每个具有限定谐振腔的间隙的漂移管浸入轴向磁场中。 RF能量被引入到这些谐振腔中的一个处的输入RF端口处，并且在不同RF空腔处的输出RF端口处被收集。 多个电子束通过这些漂移管，并且每个电子束具有施加的单独的磁性成形，其使得能够将束流传输通过漂移管。

    Electron tube with axial beam and pyrolitic graphite grid
    97.
    发明授权
    Electron tube with axial beam and pyrolitic graphite grid 失效
    电子管与轴向梁和热解石墨网格

    公开(公告)号：US06635978B1

    公开(公告)日：2003-10-21

    申请号：US09622165

    申请日：2000-08-14

    申请人： Guy Clerc

    发明人： Guy Clerc

    IPC分类号： H01J146

    CPC分类号： H01J23/065 ,  H01J2225/04

    摘要： A grid for an electron tube with an axial beam which includes an apertured part through which the electrons of the beam are intended to pass. The grid is in the form of a bell and is made of a single material. The apertured part is located at the top of the bell but is placed in the bottom of a hollow so that the electrons passing through the grid around its periphery are focused onto the axis. Such a grid may find particular application to IOT-type tubes.

    摘要翻译： 用于具有轴向光束的电子管的格栅，其包括光束的电子通过的有孔部分。 电网为铃形，由单一材料制成。 有孔部分位于钟的顶部，但被放置在中空的底部，使得通过围绕其周边的格栅的电子被聚焦在轴上。 这样的网格可以发现特定应用于IOT型管。

    Electron gun arrangements having closely spaced cathode and electrode and a vacuum seal
    98.
    发明授权
    Electron gun arrangements having closely spaced cathode and electrode and a vacuum seal 失效
    具有紧密间隔的阴极和电极以及真空密封的电子枪装置

    公开(公告)号：US06614158B1

    公开(公告)日：2003-09-02

    申请号：US09306811

    申请日：1999-05-07

    申请人： Alfred Christopher Thwaites ,  David Ward Carr ,  Steven Bardell ,  Peter Robert John Cox

    发明人： Alfred Christopher Thwaites ,  David Ward Carr ,  Steven Bardell ,  Peter Robert John Cox

    IPC分类号： H01J2946

    CPC分类号： H01J23/065 ,  H01J2225/04

    摘要： An electron gun arrangement includes a cathode having a front surface and control grid located in front of it. The control grid is mounted via a cylindrical support on a Kovar mount. The cathode is supported by a cylindrical support mounted on a Kovar support. Ceramic material being located between the two supports. The vacuum envelope within which the electron gun is contained includes the Kovar support and a flexible member with which it makes a vacuum seal, this member being of copper. The copper member is sealed to a ceramic cylinder via metal flanges. The assembly permits the spacing between the cathode and grid to be maintained while the copper member permits thermal expansion to occur to maintain vacuum integrity.

    摘要翻译： 电子枪装置包括具有位于其前面的前表面和控制栅格的阴极。 控制网格通过圆柱形支架安装在Kovar安装座上。 阴极由安装在科瓦尔支架上的圆柱形支架支撑。 陶瓷材料位于两个支架之间。 包含电子枪的真空外壳包括科瓦尔支架和一个柔性构件，通过该弹性构件进行真空密封，该构件是铜。 铜构件通过金属法兰密封到陶瓷圆筒。 组件允许在铜构件允许发生热膨胀以保持真空完整性的同时保持阴极和栅极之间的间隔。

    Temperature compensated gun
    99.
    发明申请
    Temperature compensated gun 失效
    温度补偿枪

    公开(公告)号：US20020153818A1

    公开(公告)日：2002-10-24

    申请号：US09839207

    申请日：2001-04-23

    申请人： Litton Systems, Inc.

    发明人： Holger Schult ,  John Cipolla

    IPC分类号： H01J001/46 ,  H01J021/10

    CPC分类号： H01J23/065 ,  H01J2225/04

    摘要： The invention relates to linear beam amplification devices having an electron emitting cathode and an RF modulated grid closely spaced therefrom, and more particularly, to a novel support structure for the grid that accommodates thermal expansion while maintaining an optimum grid-to-cathode spacing.

    摘要翻译： 本发明涉及具有电子发射阴极和与其紧密隔开的RF调制栅格的线性光束放大装置，更具体地说，涉及一种用于容纳热膨胀同时保持最佳栅格与阴极间隔的网格的新型支撑结构。

    Linear beam microwave tube with planar cold cathode electrode as electron beam source
    100.
    发明授权
    Linear beam microwave tube with planar cold cathode electrode as electron beam source 失效
    具有平面冷阴极电极的线性微波管作为电子束源

    公开(公告)号：US5796212A

    公开(公告)日：1998-08-18

    申请号：US739782

    申请日：1996-10-30

    申请人： Satoshi Tonegawa

    发明人： Satoshi Tonegawa

    IPC分类号： H01J23/06 ,  H01J3/02 ,  H01J23/065 ,  H01J23/083

    CPC分类号： H01J23/065 ,  H01J3/021 ,  H01J2225/34

    摘要： An electron gun using a plane type cold cathode electrode has a beam focusing electrode which is disposed in front of the plane type cold cathode electrode and has a hole having a diameter smaller than an electron emission region. The beam focusing electrode is in direct contact with a cathode chip constituting the plane type cold cathode electrode, thus realizing direct electrical connection between the cold cathode chip and the beam focusing electrode. The arrangement enables the converging of an electron beam from the cold cathode electrode to a desired shape and the accurate setting of the center of a beam orbit to a desired position.

    摘要翻译： 使用平面型冷阴极电极的电子枪具有设置在平面型冷阴极电极前方并具有比电子发射区域小的直径的孔的聚束电极。 束聚焦电极与构成平面型冷阴极电极的阴极芯片直接接触，从而实现冷阴极芯片和聚束电极之间的直接电连接。 该布置使得能够将来自冷阴极电极的电子束会聚到期望的形状，并将光束轨道的中心精确地设定到所需位置。