公开(公告)号：US5581591A

公开(公告)日：1996-12-03

申请号：US345921

申请日：1994-11-28

Applicant: James E. Burke ,  Lester Miller ,  Salvatore Perno ,  Norman E. Wandke

Inventor： James E. Burke ,  Lester Miller ,  Salvatore Perno ,  Norman E. Wandke

IPC: H05G1/02 ,  H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/14 ,  H01J35/16 ,  H01J35/24 ,  H01J35/26 ,  H05G1/04 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66 ,  H01J35/04

CPC classification number: H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/14 ,  H01J35/165 ,  H01J35/24 ,  H01J35/26 ,  H05G1/04 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66 ,  H01J2235/10 ,  H01J2235/162 ,  H05G1/025

Abstract: An x-ray tube includes an anode (A) and an envelope (C). A cathode assembly (B) which is supported in the envelope on a bearing (32) emits a beam of electrons which strike the anode forming a focal spot. The anode rotates (D) relative to the cathode such that focal spot follows a generally annular path along a beveled track (14). If the axis of the anode and the cathode assembly are screwed or offset, the focal spot path is not circular and wobbles. An adjustment assembly (60) adjusts the relative positions of the anode, the cathode and the envelope to adjust the anode and cathode assembly axes. The adjustment assembly also includes one or more electrodes (102, 108) which adjust the position of the focal spot. An angular position encoder (106) identifies an angular orientation of the anode. A control circuit (110) applies an electrostatic potential to the electrodes to move the focal spot such that it stays on a constant plane of the leveled anode surface.

Abstract translation: X射线管包括阳极（A）和外壳（C）。 支撑在轴承（32）上的外壳中的阴极组件（B）发射撞击阳极的电子束，形成焦点。 阳极相对于阴极旋转（D），使得焦斑沿着斜面轨道（14）沿着大致环形路径。 如果阳极和阴极组件的轴线被拧紧或偏移，则焦点路径不是圆形并且摆动。 调节组件（60）调节阳极，阴极和外壳的相对位置以调节阳极和阴极组件的轴线。 调整组件还包括一个或多个调整焦点位置的电极（102,108）。 角位置编码器（106）识别阳极的角度取向。 控制电路（110）向电极施加静电电位以使焦点移动，使其保持在平整的阳极表面的恒定平面上。

公开(公告)号：US5347571A

公开(公告)日：1994-09-13

申请号：US957219

申请日：1992-10-06

Applicant: Avery D. Furbee ,  Lester Miller ,  Carl F. Bauer

Inventor： Avery D. Furbee ,  Lester Miller ,  Carl F. Bauer

IPC: H02H9/02 ,  H05G1/10 ,  H05G1/54

CPC classification number: H05G1/10 ,  H05G1/54 ,  H02H9/02

Abstract: A high frequency voltage generator (10) produces a high positive voltage and a high negative voltage. A parallel connected coil (26) and diode (30) are connected between the high voltage supply and a target (44) of an x-ray tube (40). A second parallel connected coil (28) and diode (32) are connected between the negative voltage and an electron source (42) of the x-ray tube. The coils are preferably a multiple pancake design (FIG. 3 ). When the tube starts to arc, the sudden increase in current flow through the coil is converted and stored in a magnetic field leaving only a small current to contribute to arcing. The coils are sized such that the current which passes to the x-ray tube is sufficiently small that the arcing is usually extinguished without an avalanche phenomenon occurring. The diodes permit the energy stored in the magnetic field to be converted into a current flow through the coil and diode such that the energy is dissipated as heat by the inherent electrical resistance of the coil with only a minimal amount of the energy passing over time to the x-ray tube.

Abstract translation: 高频电压发生器（10）产生高正电压和高负电压。 并联连接的线圈（26）和二极管（30）连接在高电压源和X射线管（40）的靶（44）之间。 第二并联线圈（28）和二极管（32）连接在负电压和X射线管的电子源（42）之间。 线圈优选为多煎饼设计（图3）。 当管开始电弧时，通过线圈的电流的突然增加被转换并存储在磁场中，仅留下小的电流以有助于电弧。 线圈的尺寸使得通过X射线管的电流足够小，使得通常在不发生雪崩现象的情况下熄灭电弧。 二极管允许存储在磁场中的能量转换成通过线圈和二极管的电流，使得能量通过线圈的固有电阻而被耗散，只有最小量的能量随时间传递到 x射线管。