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    Magnetically focused electron beam tube
    25.
    发明授权
    Magnetically focused electron beam tube 失效
    磁聚焦电子束管

    公开(公告)号：US3955114A

    公开(公告)日：1976-05-04

    申请号：US483854

    申请日：1974-06-21

    Applicant: Joshua J. Behenna ,  Graham Harold George Phipps

    Inventor： Joshua J. Behenna ,  Graham Harold George Phipps

    IPC: H01J19/34 ,  H01J21/18 ,  H01J7/26

    CPC classification number: H01J21/18 ,  H01J19/34 ,  H01J2893/0003

    Abstract: A magnetically focused coaxial triode structure includes a central longitudinal cathode, an intermediate control electrode around the cathode, and an outer tubular anode. The control electrode supports the inner cathode and is mounted on insulating spacers at the ends. Axial transverse slots along the control electrode provide openings for the electron beam. The anode has flat longitudinal water cooling channels connected by annular recesses at the ends.

    Abstract translation: 磁聚焦同轴三极管结构包括中央纵向阴极，围绕阴极的中间控制电极和外部管状阳极。 控制电极支撑内阴极，并在端部安装在绝缘垫片上。 沿着控制电极的轴向横向狭缝为电子束提供开口。 阳极具有平坦的纵向水冷却通道，其端部由环形凹槽连接。

    Electron tube duplex grid structure
    26.
    发明授权
    Electron tube duplex grid structure 失效
    电子管双网格结构

    公开(公告)号：US3917973A

    公开(公告)日：1975-11-04

    申请号：US48740674

    申请日：1974-07-10

    Applicant: VARIAN ASSOCIATES

    Inventor： NEEDLE JULES S ,  SAIN WILLIAM H

    IPC: H01J3/02 ,  H01J1/20 ,  H01J1/46 ,  H01J19/34 ,  H01J21/06 ,  H01J23/06 ,  H01J19/14

    CPC classification number: H01J21/065 ,  H01J1/20 ,  H01J19/34 ,  H01J2893/0003

    Abstract: A gridded electron tube suitable for generating high power at high frequency, has a cathode surface composed of a set of parallel emitting strips separated by non-emitting strips. Massive grid bars are aligned over the non-emitting strips, thereby reducing grid current interception and providing thermal dissipation. Attached to the side of the grid bars facing the cathode is an array of closely spaced fine wires which increase the electric field due to the grid at the emitting surface, and decrease the penetration of field due to the anode, thereby increasing the transconductance and amplification factor, decreasing the transit time of electrons, and improving the uniformity of emission current density.

    Abstract translation: 适用于在高频下产生高功率的格栅电子管具有由一组由不发射条分开的平行发射条组成的阴极表面。 大量栅格条在非发射条上对准，从而减少电网电流截取并提供散热。 附着在面向阴极的栅格条的一侧是紧密间隔的细线的阵列，其增加由于在发射表面处的栅格引起的电场，并且减少由于阳极引起的场的穿透，从而增加跨导和放大 因子，减少电子的传播时间，提高发射电流密度的均匀性。

    Method of making an electron tube having an improved filamentary cathode and support therefor
    27.
    发明授权
    Method of making an electron tube having an improved filamentary cathode and support therefor 失效
    制造具有改进的阴极阴极的电子管的方法及其支持

    公开(公告)号：US3820206A

    公开(公告)日：1974-06-28

    申请号：US29321672

    申请日：1972-09-28

    Applicant: VARIAN ASSOCIATES

    Inventor： POLESE J

    IPC: H01J19/34 ,  H01J19/42 ,  H01J9/18

    CPC classification number: H01J19/34 ,  H01J19/42 ,  H01J2893/0003 ,  H01J2893/0005 ,  Y10T29/4976 ,  Y10T29/49863

    Abstract: AN ELECTRON TUBE IS DISCLOSED COMPRISING AN EVACUATED ENVELOPE ENCLOSING AT LEAST THREE CYLINDRICAL ELECTRODES INCLUDING A DIRECTLY HEATED CATHODE, A GRID AND AN ANODE. CATHODE SUPPORT MEANS ARE DISCLOSED COMPRISING A GENERALLY CYLINDRICAL, METALLIC STEM, A HOLLOW, METALLIC SUPPORT CYLINDER ELECTRICALLY CONNECTED TO THE CATHODE AND COAXIALLY SITUATED ABOUT AT LEAST A PORTION OF THE STEM IN SPACED RELATION THEREWITH, AND TWO DIELECTRIC ANNULI INTERPOSED BETWEEN THE STEM AND CYLINDER IN ABUTMENT THEREWITH. A METHOD OF MAKING THE JUST DESCRIBED CATHODE SUPPORT MEANS, IN WHICH THE STEM AND SUPPORT CYLINDER HAVE A COPLANAR STEP, IS ALSO DISCLOSED COMPRISING THE STEPS OF PLACING A DIELECTRIC ANNULUS HAVING A COEFFICIENT OF THERMAL EXPANSION LESS THAN THE METALLIC STEM AND CYLINDER ON THE COPLANAR STEPS WITH THE INNER SURFACE OF THE ANNULUS IN ABUTMENT WITH THE CYLINDRICAL STEM AND THE OUTER SURFACE OF THE ANNULUS IN ABUTMENT WITH THE HOLLOW SUPPORT CYLINDER, THE STEM AND CYLINDER THEREBY OCCUPYING A FIRST POSITION WITH RESPECT TO THE DIELECTRIC ANNULUS. TWO METALLIC RINGS ARE THEN PLACED UPON THE ANNULUS WITH ONE RING IN ABUTMENT WITH THE CYLINDRICAL STEM AND THE OTHER RING IN ABUTMENT WITH THE HOLLOW SUPPORT CYLINDER. MECHANICAL FORCE IS THEN APPLIED TO THE TWO METALLIC RINGS TO PUSH THEM FIRMLY AGAINST THE DIELECTRIC ANNULUS. THE ELECTRON TUBE IS THEN HEATED CAUSING THE METALLIC STEM AND CYLINDER TO EXPAND AND MOVE WITH RESPECT TO THE DIELECTRIC ANNULUS AND RINGS TO A SECOND POSITION WITH RESPECT THERETO. THE METALLIC RING IN ABUTMENT WITH THE STEM IS BRAZED THERETO AT THE SECOND POSITION, AND THE METALLIC RING IN ABUTMENT WITH THE CYLINDER IS BRAZED THERETO AT THE SECOND POSITION. THE ELECTRON TUBE IS THEN COOLED CAUSING THE STEM AND CYLINDER TO RETURN TO THEIR FIRST POSITION WITH THE DIELECTRIC ANNULUS COMPRESSED BETWEEN THE CONVERGING RINGS AND STEPS AND LOCKED SECURELY TO THE STEM AND CYLINDER. THE MECHANICAL FORCE IS THEN REMOVED FROM THE METALLIC RINGS.

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