X-ray photographic apparatus
    1.
    发明授权
    X-ray photographic apparatus 失效
    X光摄影仪

    公开(公告)号:US4346297A

    公开(公告)日:1982-08-24

    申请号:US277889

    申请日:1981-06-26

    IPC分类号: H05G1/34 H05G1/58

    CPC分类号: H05G1/34

    摘要: The disclosure relates to an X-ray photographic apparatus which can prevent the overshoot of the tube current, which is apt to generate at the start of X-ray radiation. The apparatus comprises an integration capacitor which is charged by the preset preheating level setting voltage during the preheating period, an integration circuit which integrates the difference between the reference voltage and the detection voltage corresponding to the X-ray tube current during the X-ray radiation and a filament heating current control circuit driven by said integration circuit.

    摘要翻译: 本公开涉及一种可以防止在X射线辐射开始时容易产生的管电流的过冲的X射线照相设备。 该装置包括在预热期间通过预设的预热水平设定电压进行充电的积分电容器,积分电路,其在X射线辐射期间积分基准电压与对应于X射线管电流的检测电压之间的差异 以及由所述集成电路驱动的灯丝加热电流控制电路。

    Dental radiographic apparatus for photographing entire jaws
    2.
    发明授权
    Dental radiographic apparatus for photographing entire jaws 失效
    用于拍摄整个钳口的牙科放射线照相设备

    公开(公告)号:US4340971A

    公开(公告)日:1982-07-20

    申请号:US188884

    申请日:1980-09-19

    CPC分类号: H02P5/50 A61B6/14

    摘要: The disclosure relates to a dental radiographic apparatus for photographing the entire jaws having a rotary arm including an X-ray generator disposed in an opposed relation with an X-ray film feed means. The apparatus includes a means for detecting electrically the shape and characteristics of an object through the position of the rotary arm rotated and a means for automatically controlling the rotation speed of the arm and the feed speed of an X-ray film in response to the detection signal generated by the electrical detection means, whereby it is intended to provide a clear and sharp X-ray photographic image free from distortion, uniform in density and optional in rate of enlargement.

    摘要翻译: 本发明涉及一种用于拍摄具有旋转臂的整个钳口的牙科放射线照相装置,所述旋转臂包括与X射线胶片馈送装置相对关系地设置的X射线发生器。 该装置包括用于通过旋转臂的位置电动检测物体的形状和特性的装置,以及用于响应于检测自动控制臂的旋转速度和X射线胶片的进给速度的装置 由电检测装置产生的信号,由此其旨在提供清晰且锐利的X射线摄影图像,其不具有变形,密度均匀且可选择的放大率。

    Tomograph for photographing entire jaws
    3.
    发明授权
    Tomograph for photographing entire jaws 失效
    用于拍摄整个下颌的图示

    公开(公告)号:US4430746A

    公开(公告)日:1984-02-07

    申请号:US276695

    申请日:1981-06-23

    IPC分类号: A61B6/14 G03B41/16

    CPC分类号: A61B6/14

    摘要: This disclosure relates to the improvement of a tomograph for photographing the entire jaws which is designed to make an X-ray photograph of a curved plane section of an object by changing the rotating output of a motor for driving a rotary arm by using an eccentric cam means to control a film feed speed by the rotary output thus change. This apparatus includes a tachogenerator for converting the rotating output of the rotary arm driving motor into an electric output, a voltage shunting means for shunting the output of the tachogenerator to three paths, a reference point correction circuit and a changeover resistance means, and is capable of providing a clear X-ray photograph of a patient in the range of adults to children without necessity to change the eccentric cams nor the position of the patient.

    摘要翻译: 本公开涉及用于拍摄整个钳口的断层摄影机的改进,其设计成通过使用偏心凸轮改变用于驱动旋转臂的电动机的旋转输出来进行物体的弯曲平面部分的X射线照片 通过旋转输出来控制胶卷进给速度的装置因此改变。 该装置包括用于将旋转臂驱动电动机的旋转输出转换成电输出的转速发电机,用于将转速发电机的输出分流到三路的电压分流装置,基准点校正电路和转换电阻装置,并且能够 向儿童提供在成人范围内的患者的清晰X射线照片,而无需改变偏心凸轮和患者的位置。

    Device for stabilizing tube current in X-ray photographing apparatus
    5.
    发明授权
    Device for stabilizing tube current in X-ray photographing apparatus 失效
    用于在X射线摄影装置中稳定管电流的装置

    公开(公告)号:US4370752A

    公开(公告)日:1983-01-25

    申请号:US319925

    申请日:1981-11-10

    IPC分类号: H05G1/34 H05G1/30

    CPC分类号: H05G1/34

    摘要: This device feeds back an output proportional to the electric current flowing through an X-ray tube to a filament current controlling means, reads out a difference between the increase and decrease in the current of the X-ray tube made by the effect of charge on the wall of the X-ray tube, and constantly stabilizes the current in the tube at the optimum value by increasing and decreasing a filament current in response to the difference read out.

    摘要翻译: 该装置将与流过X射线管的电流成比例的输出反馈到灯丝电流控制装置,读出由电荷效应引起的X射线管的电流的增加和减小之间的差异 通过根据读出的差异增加和减少灯丝电流,恒定地将管中的电流稳定在最佳值。

    DC High voltage generator for a dental X-ray photographing apparatus
    6.
    发明授权
    DC High voltage generator for a dental X-ray photographing apparatus 失效
    DC用于牙科X射线摄影装置的高压发生器

    公开(公告)号:US4443843A

    公开(公告)日:1984-04-17

    申请号:US277888

    申请日:1981-06-26

    CPC分类号: H05G1/10 H02M7/106 H05G1/02

    摘要: This disclosure relates to a DC high voltage generator disposed on the base which is adapted to freely move into and out of a casing and on which a high voltage transformer circuit is disposed. The transformer circuit comprises a variable magnetic leak transformer and capacitor type multiple boosting circuits disposed separately on the right and left sides of the transformer. The high voltage generator is compact, easy of maintenance and inspection and is excellent in insulating countermeasures and in efficiency.

    摘要翻译: 本公开涉及一种设置在基座上的直流高压发生器,其适于自由地进入和流出壳体并且设置有高压变压器电路。 变压器电路包括分别设置在变压器右侧和左侧的可变漏磁变压器和电容式多重升压电路。 高压发电机结构紧凑,维护检查方便,绝缘对策和效率优良。

    High voltage supply system for medical equipment
    7.
    发明授权
    High voltage supply system for medical equipment 失效
    医疗设备高压供电系统

    公开(公告)号:US4435747A

    公开(公告)日:1984-03-06

    申请号:US452392

    申请日:1982-12-22

    摘要: This disclosure relates to a system for supplying a stable DC high voltage to a load by resonantly driving a high voltage transforming circuit comprising a VLT and a capacitor type multiple boosting circuit. The system includes a VLT, a capacitor type multiple boosting circuit and a pulse-amplitude feedback control circuit designed to detect supply voltage to load, to compare the detected voltage with reference voltage and to control the voltage of the control winding of VLT by using the deviation produced by the comparison as a control signal.

    摘要翻译: 本发明涉及通过共振驱动包括VLT和电容式多重升压电路的高电压变换电路来向负载提供稳定的DC高电压的系统。 该系统包括VLT,电容式多重升压电路和设计用于检测负载电源电压的脉冲幅度反馈控制电路,以将检测到的电压与参考电压进行比较,并通过使用该功能来控制VLT的控制绕组的电压 通过比较产生的偏差作为控制信号。

    Occlusion pressure sensor
    8.
    发明授权
    Occlusion pressure sensor 失效
    闭塞压力传感器

    公开(公告)号:US4390028A

    公开(公告)日:1983-06-28

    申请号:US247272

    申请日:1981-03-25

    CPC分类号: A61C19/05 G01L1/20

    摘要: The disclosure relates to an occlusion pressure sensor of the construction in which pressure sensitive block changing in electric characteristic under external pressure are arranged in multiple rows. The occlusion pressure sensor is designed to detect an electric signal responsive to occlusion pressure from the pressure sensitive blocks by successively and electrically scanning the blocks in the state of a patient engaging his teeth.

    摘要翻译: 本发明涉及一种结构的闭塞压力传感器,其中压力敏感块在外部压力下电特性的变化被排列成多排。 闭塞压力传感器被设计成通过在患者接合他的牙齿的状态下连续和电子扫描块来检测响应于来自压敏块的闭塞压力的电信号。

    Driving system for an ultrasonic piezoelectric transducer
    9.
    发明授权
    Driving system for an ultrasonic piezoelectric transducer 失效
    超声波压电换能器的驱动系统

    公开(公告)号:US4271371A

    公开(公告)日:1981-06-02

    申请号:US79206

    申请日:1979-09-26

    IPC分类号: B06B1/02 H01L41/08

    摘要: A driving circuit for ultrasonic tools which uses a piezoelectric transducer to convert ultrasonic electric signals into ultrasonic mechanical vibrations including a voltage-controlled oscillator which produces an output signal at a frequency that is proportional to an input voltage, a power amplifier stage having its input coupled to the output of the voltage-controlled oscillator, the power amplifier stage including an output transformer which couples the output of the power amplifier stage to the piezoelectric transducer, the power output transformer further acting as both an insulating transformer and a boosting transformer for the driving circuit and a feedback transformer coupled in series with the secondary side of the output transformer and the piezoelectric transducer, the feedback transformer having a secondary side through which a current flows which is proportional to the current flowing through the piezoelectric transducer, a phase comparitor which detects the phase difference between two signals applied to two inputs of the phase comparitor, the two inputs being respectively coupled to the output signal of the voltage controlling oscillator and the secondary side of the feedback transformer and a low pass filter which blocks high frequency components to pass therethrough connected between an output of the phase comparitor and the input of the voltage controlled oscillator.

    摘要翻译: 一种用于超声波工具的驱动电路,其使用压电换能器将超声波电信号转换成超声机械振动,包括以与输入电压成比例的频率产生输出信号的压控振荡器,功率放大器级的输入耦合 对于压控振荡器的输出,功率放大器级包括将功率放大器级的输出耦合到压电换能器的输出变压器,功率输出变压器进一步充当用于驱动的​​绝缘变压器和升压变压器 电路和与输出变压器和压电换能器的次级侧串联耦合的反馈变压器,反馈变压器具有次级侧,电流与流过压电换能器的电流成比例流动;相位比较器,其检测 相位不同 两个输入分别耦合到电压控制振荡器和反馈变压器的次级侧的输出信号,以及阻塞高频分量通过的低通滤波器连接到相位比较器的两个输入端 在相位比较器的输出和压控振荡器的输入之间。