公开(公告)号：US20010050536A1

公开(公告)日：2001-12-13

申请号：US09910719

申请日：2001-07-24

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Nobuharu Harada ,  Syoji Ishihara

IPC: H01J017/18

CPC classification number: H01J9/047 ,  H01J61/073

Abstract: A discharge tube is comprised of a glass bulb, a cathode, and an anode. The cathode consists of a cathode tip portion of a bullet shape made by impregnating porous tungsten with barium, and a cylindrical lead rod of molybdenum having a recess. Apart of a base of the cathode tip portion is placed in the recess of the lead rod and a clearance between the internal surface of the recess of the lead rod and the side face of the insert part of the cathode tip portion is sealed with a molybdenum-ruthenium brazing filler metal.

Abstract translation: 放电管由玻璃灯泡，阴极和阳极组成。 阴极由通过用钡浸渍多孔钨制成的子弹形状的阴极尖端部分和具有凹部的钼的圆柱形引线杆组成。 除了阴极尖端部分的底座之外还放置在引线杆的凹槽中，引线杆的凹部的内表面与阴极尖端部分的插入部分的侧面之间的间隙用钼 钌钎焊料。

公开(公告)号：US20020027419A1

公开(公告)日：2002-03-07

申请号：US09986406

申请日：2001-11-08

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Nobuharu Harada ,  Syoji Ishihara

IPC: H01J017/04

CPC classification number: H01J61/0737

Abstract: A discharge tube in which a cathode with a cathode tip portion being fixed to a lead rod and an anode opposed to the cathode tip portion are encapsulated in a discharge gas atmosphere to effect arc discharge, wherein the cathode tip portion comprises: a metal substrate of an impregnated type in which a porous, refractory metal is impregnated with an electron-emissive material or a sintered type in which a refractory metal containing an electron-emissive material is sintered; and a coating of a refractory metal covering a predetermined portion in a surface of the metal substrate and having a thickness of not less than 0.02 nullm nor more than 5 nullm, wherein the metal substrate has a cusp pointed toward the anode, and wherein a tip portion of the cusp of the metal substrate is exposed without being covered by the coating.

Abstract translation: 一种放电管，其中具有阴极尖端部分固定到引线杆的阴极和与阴极尖端部分相对的阳极的阴极被封装在放电气体气氛中以实现电弧放电，其中阴极尖端部分包括：金属基底 其中用电子发射材料浸渍多孔难熔金属或其中烧结含有电子发射材料的难熔金属的烧结类型的浸渍型; 以及覆盖金属基板的表面中的预定部分的难熔金属的涂层，其厚度不小于0.02μm或不大于5μm，其中金属基板具有指向阳极的尖端，并且其中尖端 暴露金属基材的尖端部分而不被涂层覆盖。

公开(公告)号：US20010052755A1

公开(公告)日：2001-12-20

申请号：US09912384

申请日：2001-07-26

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Nobuharu Harada ,  Syoji Ishihara

IPC: H01J061/04

CPC classification number: H01J17/06 ,  H01J61/0732

Abstract: A discharge tube is comprised of a glass bulb, a cathode, and an anode. Impregnating porous tungsten with barium makes the cathode tip portion. A clearance between the end face of a lead rod and the end face of the cathode tip portion is filled with a molybdenum-ruthenium brazing filler metal.

Abstract translation: 放电管由玻璃灯泡，阴极和阳极组成。 用钡浸渍多孔钨使阴极尖端部分。 引线棒的端面与阴极端部的端面之间的间隙填充有钼 - 钌钎焊料。