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    Thermionic cathode with continuous bimetallic wall having varying wall thickness and internal blackening
    91.
    发明授权
    Thermionic cathode with continuous bimetallic wall having varying wall thickness and internal blackening 失效
    具有连续双金属壁的热阴极具有变化的壁厚和内部变黑

    公开(公告)号：US5422536A

    公开(公告)日：1995-06-06

    申请号：US101157

    申请日：1993-08-03

    Applicant: John R. Hale ,  Jeffrey M. Farina

    Inventor： John R. Hale ,  Jeffrey M. Farina

    IPC: H01J1/26 ,  H01J29/04 ,  H01J29/46

    CPC classification number: H01J1/26 ,  H01J29/04

    Abstract: A cathode sheath for a thermionic electron-gun cathode. The sheath is substantially in the form of a hollow cylinder and has an outer surface and an inner surface, a central axis, a closed end and an axially-opposite open end, and a side wall extending between the closed end and the open end. The sheath is a continuous bimetallic laminate having a first layer of material forming the inner surface and a second layer of electron-emission (donor) material overlying substantially the entirety of the first layer and forming the outer surface. The laminate has a preselected thickness at the closed end and has a thickness at the side wall which varies along the central axis. The outer surface of the bimetallic laminate is substantially unreactive with oxygen whereas the inner surface is more readily reactive with oxygen. When the cathode sheath is heated and exposed to an atmosphere of wet gas, the inner surface of the sheath becomes blackened (an oxide layer forms thereon) whereas the outer surface remains unaltered and substantially free from irregularities or roughness.

    Abstract translation: 用于热电子枪阴极的阴极护套。 护套基本上是中空圆柱体的形式，并且具有外表面和内表面，中心轴线，封闭端和轴向相对的开口端，以及在封闭端和开口端之间延伸的侧壁。 鞘是具有形成内表面的第一材料层和覆盖基本上整个第一层并形成外表面的第二层电子发射（供体）材料的连续双金属层压体。 层压板在封闭端具有预选的厚度，并且在侧壁处具有沿中心轴线变化的厚度。 双金属层压体的外表面与氧基本上不反应，而内表面更容易与氧反应。 当阴极鞘被加热并暴露于湿气氛中时，护套的内表面变黑（在其上形成氧化物层），而外表面保持不变，基本上没有凹凸或粗糙。

    Method for manufacturing impregnated cathodes
    92.
    发明授权
    Method for manufacturing impregnated cathodes 失效
    浸渍阴极的制造方法

    公开(公告)号：US5132081A

    公开(公告)日：1992-07-21

    申请号：US813671

    申请日：1991-12-27

    Applicant: Kyung S. Lee

    Inventor： Kyung S. Lee

    IPC: B22F7/00 ,  H01J1/26 ,  H01J1/28 ,  H01J9/04

    CPC classification number: B22F7/002 ,  H01J1/26 ,  H01J9/047

    Abstract: A method for manufacturing an impregnated cathode comprising the steps of forming a porous pallet having a plurality of pores by sintering metal powder at a high temperature in a reducing atmosphere and fitting the porous pallet tightly in a cathode ring made of a metal containing an oxidizable material such as silicon, nickel or chromium. In the porous pallet, an electron radiating material is impregnated which is able to react with the oxidizable material of the cathode ring, so that an fixing between the pallet and the cathode ring is achieved by the reaction between the electron radiating material and the oxidizable material. In accordance with the method, the thickness of the cathode body can be greatly reduced, thereby enabling the performance of the impregnated cathode to be improved. Also, the manufacturing process can be simplified, thereby improving the productivity.

    Abstract translation: 一种浸渍阴极的制造方法，其特征在于，包括以下步骤：通过在还原气氛中高温烧结金属粉末，形成具有多个孔的多孔托盘，并将所述多孔托盘紧紧地装配在由含有可氧化材料的金属制成的阴极环中 例如硅，镍或铬。 在多孔托盘中，浸渍能够与阴极环的可氧化材料反应的电子辐射材料，从而通过电子辐射材料和可氧化材料之间的反应来实现托盘和阴极环之间的固定 。 根据该方法，阴极体的厚度可以大大降低，从而能够提高浸渍阴极的性能。 此外，可以简化制造过程，从而提高生产率。

    Dispenser cathode structure for use in electron gun
    93.
    发明授权
    Dispenser cathode structure for use in electron gun 失效
    用于电子枪的分配器阴极结构

    公开(公告)号：US5113110A

    公开(公告)日：1992-05-12

    申请号：US633529

    申请日：1990-12-31

    Applicant: Dong-Gil Jang

    Inventor： Dong-Gil Jang

    IPC: H01J1/26 ,  H01J1/28 ,  H01J29/04

    CPC classification number: H01J29/04 ,  H01J1/26

    Abstract: A dispenser cathode for an electron gun comprises a reservoir for holding thermoelectron emissive material. A sleeve having an outward flange at a top portion thereof and receives the reservoir at the upper portion thereof and receives a heating element at the other end. A heat shielding tube is provided with an inward flange at the top thereof that overlaps and is welded to the outward flange of the sleeve. A holder for supporting the heat shielding tube is secured thereto.

    Cathode for an electric discharge tube
    94.
    发明授权
    Cathode for an electric discharge tube 失效
    放电管阴极

    公开(公告)号：US5030879A

    公开(公告)日：1991-07-09

    申请号：US503333

    申请日：1990-03-30

    Applicant: Petrus J. A. M. Derks

    Inventor： Petrus J. A. M. Derks

    IPC: H01J1/14 ,  H01J1/20 ,  H01J1/26 ,  H01J9/04 ,  H01J29/04

    CPC classification number: H01J1/26 ,  H01J1/20 ,  H01J9/04

    Abstract: Cathode for an electric discharge tube having a short warm-up time and a long lifetime. The cathode comprises a metal (particularly nickel) support base coated with a layer of potentially electron-emissive material, which support base has a thickness ranging between 20 and 150 .mu.m, and metal crystallites having a size which does not permit of any further crystallite growth or recrystallization. Preferably, the crystallites of the support base have a size which corresponds to the thickness of the support base.

    Oxide cathode
    95.
    发明授权
    Oxide cathode 失效
    氧化物阴极

    公开(公告)号：US4904897A

    公开(公告)日：1990-02-27

    申请号：US677948

    申请日：1984-12-04

    Applicant: Johannes Van Esdonk ,  Jan Hasker ,  Jacobus Stoffels

    Inventor： Johannes Van Esdonk ,  Jan Hasker ,  Jacobus Stoffels

    IPC: H01J1/14 ,  H01J1/20 ,  H01J1/26 ,  H01J9/04

    CPC classification number: H01J1/26

    Abstract: An oxide cathode comprising a base 1 which consists substantially of titanium and a heater element 5 coated with aluminium oxide 6 to heat the base 1, which bears a porous alkaline earth metal oxide emissive layer 4. When the surface of the titanium base 1 which is opposed to the heater element 5 bears a metal layer 7 consisting at least of one of the metals Pt, Mo, Ta and W, a solution is obtained to the problem occurring in titanium cathodes in that titanium in contact with aluminium oxide is not chemically stable. The metal layer preferably consisits of pure tungsten and is formed by chemical vapour desposition (CVD). The metal layer is preferably from 1 to 10 .mu.m thick.

    Abstract translation: 一种氧化物阴极，其包括基本上由钛组成的基体1和涂覆有氧化铝6的加热元件5，以加热承载多孔碱土金属氧化物发射层4的基体1.当钛基1的表面 与加热器元件5相对的是具有至少由金属Pt，Mo，Ta和W中的至少一种构成的金属层7，获得了在钛阴极中发生的问题的解决方案是，与氧化铝接触的钛不是化学稳定的 。 金属层优选地是纯钨，并且通过化学气相沉积（CVD）形成。 金属层的厚度优选为1〜10μm。

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