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公开(公告)号：US06459768B1
公开(公告)日：2002-10-01
申请号：US09680924
申请日：2000-10-06
IPC分类号： H01J3518
CPC分类号： H01J35/18
摘要： A method and apparatus for providing a window frame and window for use in an x-ray tube, wherein the new structure reduces deforming stresses on the window produced by pressure differential incident upon the window. The support structure of the window frame to which the window is attached is angled toward the interior of the x-ray tube to an angle equaling the deflection to which a window is typically subjected in standard window frames. A window mounted to a frame in accordance with the present invention is subjected to reduced or eliminated deforming stresses, even in high deflection stress environments including air bake x-ray tube manufacturing processes. This elimination of deforming stresses allows for the use of thinner x-ray tube windows enabling a higher transmissivity of produced x-rays.
摘要翻译： 一种用于提供在X射线管中使用的窗框和窗的方法和设备，其中，所述新结构减少了由入射在窗口上的压差产生的窗户上的变形应力。 窗口附接到的窗框的支撑结构朝向x射线管的内部成角度等于窗口通常在标准窗框中经受的偏转角。 即使在包括空气烘烤X射线管制造工艺在内的高偏转应力环境中，根据本发明的安装在框架上的窗也受到减小或消除的变形应力的影响。 这种消除变形应力允许使用更薄的X射线管窗，使得可以产生更高的x射线透射率。
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公开(公告)号：US07657002B2
公开(公告)日：2010-02-02
申请号：US11343599
申请日：2006-01-31
申请人： James Burke , Charles Lynn Chidester , Bruce A Cain , Rob Treseder , James Boye , Ray Daly , Ricky Smith , Paul Gene Christean
发明人： James Burke , Charles Lynn Chidester , Bruce A Cain , Rob Treseder , James Boye , Ray Daly , Ricky Smith , Paul Gene Christean
IPC分类号： H01J35/06
CPC分类号： H01J35/06 , H01J2235/06 , H01J2235/1026 , H01J2235/1216
摘要： A cathode assembly including certain features designed to protect the integrity of a filament contained therein is disclosed. In particular, the cathode assembly is configured to prevent damage to the filament should it inadvertently contact another portion of the cathode assembly. In an example embodiment, an x-ray tube incorporating features of the present invention is disclosed. The x-ray tube includes an evacuated enclosure containing a cathode assembly and an anode. The cathode assembly includes a head portion having a head surface. A slot is defined on the head surface and an electron-emitting filament is included in the slot. A protective surface is defined on the head surface proximate to a central portion of the filament. The protective surface in one embodiment is composed of tungsten and is configure to prevent fusing of the filament to the protective surface should the filament inadvertently contact the protective surface.
摘要翻译： 公开了一种阴极组件，其包括设计成保护其中所包含的细丝的完整性的某些特征。 特别地，阴极组件被构造成如果它不经意地接触阴极组件的另一部分，则防止对细丝的损坏。 在示例性实施例中，公开了包含本发明的特征的X射线管。 x射线管包括一个包含阴极组件和一个阳极的真空外壳。 阴极组件包括具有头表面的头部部分。 在头表面上限定狭缝，并且在槽中包括电子发射丝。 保护表面限定在靠近灯丝中心部分的头表面上。 一个实施例中的保护表面由钨组成，并且被配置为当灯丝不经意地接触保护表面时防止灯丝熔合到保护表面。
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3.发明授权公开(公告)号：US06819741B2
公开(公告)日：2004-11-16
申请号：US10378174
申请日：2003-03-03
IPC分类号： H01J3506
摘要： An apparatus and method for reducing the incidence of electric field stress on portions of insulating structures within high voltage devices is disclosed. Each of the embodiments disclosed herein modifies the conductive properties of the insulating structure surface in a non-uniform manner such that the distribution of voltage potential along the surface thereof is more fully equalized during operation of the high voltage device. This, in turn, reduces the per unit stress on the insulating structure caused by the electric field of the high voltage device. Through embodiments of the present invention are preferably directed to utilization in x-ray tube devices, a variety of high voltage devices may benefit from application of the disclosed matter.
摘要翻译： 公开了一种用于降低高压装置内的绝缘结构部分上的电场应力的发生的装置和方法。 本文公开的每个实施例以不均匀的方式修改绝缘结构表面的导电性质，使得在高压器件的操作期间，沿着其表面的电压电势的分布更加完全均衡。 这又降低了由高压器件的电场引起的绝缘结构上的每单位应力。 通过本发明的实施例优选地涉及在x射线管装置中的应用，各种高压装置可以受益于所公开的物质的应用。
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公开(公告)号：US06438207B1
公开(公告)日：2002-08-20
申请号：US09395709
申请日：1999-09-14
IPC分类号： H01J3514
CPC分类号： H01J35/14
摘要： An x-ray tube having a cathode and an anode disposed within an evacuated housing is disclosed. The cathode is spaced apart from a target surface formed on the anode and the anode is placed at a positive voltage relative to the cathode so that electrons emitted from the cathode accelerate towards and strike the target surface at a focal spot. The resulting collision produces x-rays. The cathode assembly includes a cathode support base, upon which is mounted a filament for emitting electrons. A first focusing mechanism focuses the emitted electrons into an electron beam. In illustrated embodiments, a pair of deflector plates are also supported upon the cathode support base. Voltage potentials are applied to the deflector plates so as to create a deflection region which alters the trajectory of the electron beam and thereby reposition the focal spot on the anode target. The cathode assembly also includes as secondary focusing mechanism, formed as a focusing aperture, that further focuses the electron beam before it exits the cathode assembly. The focusing aperture has a size and a shape that provides controls the size and the shape of the focal spot. In preferred embodiments, the aperture is formed within a housing that substantially encloses the filament, the deflector plates and the cathode cup. Preferably the housing is at the same electrical potential as the cathode cup. The housing electrically and physically isolates the cathode assembly from the anode, thereby reducing arcing between the two and reducing the amount of heat that is radiated to the cathode.
摘要翻译： 公开了一种具有设置在抽真空壳体内的阴极和阳极的X射线管。 阴极与形成在阳极上的目标表面间隔开，并且阳极相对于阴极被置于正电压，使得从阴极发射的电子在焦点处朝向和撞击目标表面加速。 所产生的碰撞产生X射线。 阴极组件包括阴极支撑基座，在其上安装用于发射电子的灯丝。 第一聚焦机制将发射的电子聚焦成电子束。 在所示实施例中，一对偏转板也支撑在阴极支撑基座上。 电压电位被施加到偏转板，以便产生改变电子束轨迹的偏转区域，从而重新定位阳极靶上的焦斑。 阴极组件还包括形成为聚焦孔的二次聚焦机构，其在离开阴极组件之前进一步聚焦电子束。 聚焦孔径具有尺寸和形状，可以控制焦斑的尺寸和形状。 在优选实施例中，孔形成在壳体内，其基本上围绕灯丝，偏转板和阴极杯。 优选地，壳体处于与阴极杯相同的电位。 壳体电和物理地将阴极组件与阳极隔离，从而减少两者之间的电弧并减少辐射到阴极的热量。
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公开(公告)号：US07327829B2
公开(公告)日：2008-02-05
申请号：US10828637
申请日：2004-04-20
IPC分类号： H01J35/06
CPC分类号： H01J35/06
摘要： An improved cathode assembly, including a filament for producing an electron stream having a highly uniform cross sectional density. The cathode assembly comprises a support base, a cathode cup affixed to the support base, and a filament disposed in a slot defined on the bottom face of the cup. In one embodiment, the side walls of the slot are shaped so as to allow greater electric field penetration about regions of the filament that typically produce relatively low quantities of electrons, thereby increasing electron emission therefrom. Other embodiments are directed to modifying either the filament winding configuration or the wire from which the filament is formed, in order to equalize electron production by the filament. The uniformly dense electron stream is preferably directed toward the anode of an x-ray tube, thereby producing a superior x-ray beam for a variety of applications.
摘要翻译： 一种改进的阴极组件，包括用于产生具有高度均匀横截面密度的电子流的细丝。 阴极组件包括支撑基座，固定到支撑基座上的阴极杯，以及设置在限定在杯子的底面上的狭槽中的细丝。 在一个实施例中，槽的侧壁成形为允许在通常产生相对低量的电子的细丝区域处更大的电场穿透，从而增加电子发射。 其他实施例涉及改变丝线缠绕构型或形成细丝的线，以便均衡由细丝产生的电子。 均匀致密的电子流优选地指向x射线管的阳极，从而为各种应用产生优异的x射线束。
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