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    Enhanced secondary electron emitter
    2.
    发明授权
    Enhanced secondary electron emitter 失效
    增强二次电子发射器

    公开(公告)号：US4975656A

    公开(公告)日：1990-12-04

    申请号：US332628

    申请日：1989-03-31

    Applicant: Gregory T. Schaeffer ,  John C. Cipolla ,  Guilford R. MacPhail

    Inventor： Gregory T. Schaeffer ,  John C. Cipolla ,  Guilford R. MacPhail

    IPC: H01J19/14

    CPC classification number: H01J19/14

    Abstract: The present invention discloses an enhanced secondary electron emitter cathode suitable for use in a typical crossed-field amplifiers. The emitter surfaces of the cathode are formed into protuberances or knurls. The cathode's secondary emission characteristics are enhanced by providing protuberances with more surface area for electrons to bombard and for electrons to be emitted from. The protuberances increase the variety of angles of incidence of bombarding electrons thereby increasing the probability that bombarded electrons can escape the cathode's surfaces.

    Abstract translation: 本发明公开了一种适用于典型交叉场放大器的二次电子发射极阴极。 阴极的发射极表面形成为突起或滚花。 阴极的二次发射特性通过提供具有更多表面积的突起来增强电子的轰击和电子的发射。 突起增加了轰击电子的入射角的多样性，从而增加了轰击的电子可能逸出阴极表面的可能性。

    Grid controlled electron source and method of making same
    3.
    发明授权
    Grid controlled electron source and method of making same 失效
    电网控制电子源及其制作方法

    公开(公告)号：US3967150A

    公开(公告)日：1976-06-29

    申请号：US545867

    申请日：1975-01-31

    Applicant: Erling L. Lien ,  George V. Miram ,  Richard B. Nelson

    Inventor： Erling L. Lien ,  George V. Miram ,  Richard B. Nelson

    IPC: H01J1/28 ,  H01J1/88 ,  H01J9/04 ,  H01J19/14 ,  H01J23/06 ,  H01J23/065 ,  H01J1/20

    CPC classification number: H01J19/14 ,  H01J23/065

    Abstract: A grid-controlled electron source comprises an apertured grid spaced in front of a thermionic cathode. Areas of the cathode directly behind the grid conductors are made non-emissive by a bonded surface layer of non-emissive material such as zirconium. On porous metal cathodes impregnated with active emitting material the metal surface may be sealed with a dense layer of inactive metal under the non-emissive layer to prevent chemical reaction of the latter with the emitting material.Methods of depositing the surface layers in the desired pattern include coating the cathode's entire large-scale surface contour, followed by machining small concave dimples into the surface, thereby removing the non-emissive layer from the dimpled surfaces from which small beamlets of electrons are focused between the grid conductors without grid interception.Another method is to mask the desired non-emissive areas with an apertured mask having solid elements registered with the desired positions of the grid conductors. The surface behind the mask apertures is coated with an inactive powder, then the mask is removed and the non-emissive layer or layers deposited in the uncoated, previously masked paths. Lastly, the inactive powder is removed, uncovering the emissive surface areas.

    Abstract translation: 栅格控制的电子源包括在热离子阴极前面间隔开的有孔网格。 直接在栅格导体之后的阴极的区域由非发射材料如锆的结合表面层而不发射。 在浸渍有活性发射材料的多孔金属阴极上，金属表面可以在非发射层下方的非活性金属致密层密封，以防止其与发射材料的化学反应。

    High-power low-voltage tetrode having a full walled matrix cathode and a control grid spacing of less than 1 mm
    5.
    发明授权
    High-power low-voltage tetrode having a full walled matrix cathode and a control grid spacing of less than 1 mm 失效
    具有全壁式矩阵阴极的大功率低电压四极杆和小于1MM的控制网格间距

    公开(公告)号：US5206565A

    公开(公告)日：1993-04-27

    申请号：US805613

    申请日：1991-12-12

    Applicant: Fritz Lussi ,  Hans-Gunter Mathews ,  Werner Rohrbach

    Inventor： Fritz Lussi ,  Hans-Gunter Mathews ,  Werner Rohrbach

    IPC: H01J19/14 ,  H01J19/42 ,  H01J21/14

    CPC classification number: H01J21/14 ,  H01J19/14 ,  H01J19/42

    Abstract: In a controllable high-power electron tube in the form of a tetrode, the anode direct voltage is reduced to less than 10 kV with an anode efficiency of greater than 80%. The tube includes coaxially arranged electrodes including a cylindrical indirectly heated full walled matrix cathode containing BaO, a cylindrical control grid, a cylindrical screen grid and an anode, where the spacing between the control grid and the cathode and the spacing between the control grid and the screen grid is less than 1 mm. Such a tube can be used for achieving AM broadcast transmitters which are distinguished by a compact construction, the overall efficiency remaining largely unchanged.

    Abstract translation: 在四极形式的可控大功率电子管中，阳极直流电压降低到小于10kV，阳极效率大于80％。 该管包括同轴布置的电极，其包括包含BaO的圆柱形间接加热的全壁基体阴极，圆柱形控制栅格，圆柱形栅格栅格和阳极，其中控制栅极和阴极之间的间距以及控制栅格与 筛网小于1 mm。 这样的管可以用于实现通过紧凑结构来区分的AM广播发射机，整体效率基本保持不变。

    Thermionic electron source with bonded control grid
    8.
    发明授权
    Thermionic electron source with bonded control grid 失效
    具有粘结控制网格的热电子源

    公开(公告)号：US4096406A

    公开(公告)日：1978-06-20

    申请号：US684689

    申请日：1976-05-10

    Applicant: George Valentine Miram ,  Erling Louis Lien

    Inventor： George Valentine Miram ,  Erling Louis Lien

    IPC: H01J9/04 ,  H01J1/28 ,  H01J1/46 ,  H01J1/48 ,  H01J3/02 ,  H01J9/14 ,  H01J19/14 ,  H01J23/02 ,  H01J23/06 ,  H01J23/065 ,  H01J1/52 ,  H01J17/04 ,  H01J19/38

    CPC classification number: H01J19/14 ,  H01J23/065

    Abstract: For a grid-controlled electron source to operate at extremely high frequencies, as in planar triodes, the control grid must be situated very close to the emissive cathode. Mechanical and thermal distortions have put minimum limits on grid spacings and hence on the maximum operating frequency of grid-controlled tubes. To overcome these limits the grid structure is formed as a network of web members which are part of a laminated sheet having metal layers bonded to opposite surfaces of an insulating layer. One metal layer is affixed to the emissive surface of a metallic matrix cathode and the other metal layer forms the control grid.

    Abstract translation: 对于栅格控制的电子源在极高频率下工作，如在平面三极管中，控制栅格必须非常靠近发射阴极。 机械和热变形对电网间距进行了最小限制，从而对电网控制管的最大工作频率进行了限制。 为了克服这些限制，格栅结构形成为网状构件的网络，网状构件的网络是具有粘合到绝缘层的相对表面的金属层的层压片材的一部分。 一个金属层固定在金属基体阴极的发射表面上，另一个金属层形成控制栅。

    Method for preparing oxide-coated cathodes
    9.
    发明授权
    Method for preparing oxide-coated cathodes 失效
    制备氧化涂层阴极的方法

    公开(公告)号：US3598646A

    公开(公告)日：1971-08-10

    申请号：US3598646D

    申请日：1968-05-28

    Applicant: RCA CORP

    Inventor： MOSCONY JOHN JOSEPH

    IPC: B65B31/00 ,  B65D45/32 ,  H01J19/14 ,  C23C3/00 ,  C23C11/00

    CPC classification number: B65D45/32 ,  B65B31/00 ,  H01J19/14

    Abstract: AN OXIDE-COATED CATHODE FOR AN ELECTRON TUBE IS PREPARED WITH PARTICLES OF A COMPOSITION CONTAINING AT LEAST ONE ALKALINE EARTH METAL COMPOUND, THE COMPOUND BEING HEAT DECOMPOSABLE TO AN OXIDE. THE PARTICLES ARE COATED WITH METALLIC COBALT, PREFERABLY PRODUCED BY THE DECOMPOSITION OF DICOBALT OCTACARBONYL IN A SOLUTION IN WHICH THE PARTICLES ARE SUSPENDED. SUBSQUENTLY, A LAYER OF THE COATED PARTICLES IS COATED ON A CATHODE SUBSTRATE. THE CATHODE IS THEN ASSEMBLED INTO AN ELECTRON TUBE. DURING THE SUBSEQUENT TUBE FABRICATION, THE LAYER IS HEATED SO AS TH DRIVE OFF THE VOLATILE MATTER THEREIN AND TO CONSOLIDATE THE COATED PARTICLE INTO SINTERED ELECTRON-EMISSIVE COATING ON THE SUBSTRATE.

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