Imaging systems
    2.
    发明授权
    Imaging systems 失效
    成像系统

    公开(公告)号:US4362993A

    公开(公告)日:1982-12-07

    申请号:US175674

    申请日:1980-08-05

    IPC分类号: G01N33/34 G01N27/00

    CPC分类号: G01N33/34

    摘要: The invention provides RF field coils and detector coils for an NMR machine. The two coils are specially designed for their respective purpose, the transmit coil (5, 6) being rectangular and the received coil (7-11) substantially elliptical with defined axis ratios and spacing in the z-direction being by projection of equi-spaced conductors on to the ellipse.

    摘要翻译: 本发明提供用于NMR机的RF场线圈和检测器线圈。 两个线圈是专门设计用于它们各自的目的的,发射线圈(5,6)是矩形的,并且接收的线圈(7-11)基本上是椭圆形的,具有限定的轴比,并且在z方向上的间隔是通过等间距 导体到椭圆。

    High voltage apparatus
    3.
    发明授权
    High voltage apparatus 失效
    高压设备

    公开(公告)号:US4963819A

    公开(公告)日:1990-10-16

    申请号:US251050

    申请日:1988-09-26

    IPC分类号: G01R15/16

    CPC分类号: G01R15/16

    摘要: The invention provides a high voltage capacitor suitable for measuring the voltage of an overhead power line. The capacitor dielectric is mounted directly on to the power line conductor, which serves as one electrode of the capacitor. The other electrode of the capacitor is mounted on to the outer surface of the dielectric, and is protected at each side by a guard ring. Stress control is provided between the outer capacitor electrode and the guard rings and also at the outer edges of the guard rings. The capacitor may be enclosed in an earthed housing, which can contain one or more current transformers. The apparatus can be used for fault detection and location, and may be used in combination with a power cable or a switch.

    摘要翻译: 本发明提供了适用于测量架空电力线的电压的高压电容器。 电容器电介质直接安装在作为电容器的一个电极的电力线导体上。 电容器的另一个电极安装在电介质的外表面上,并在每一侧被保护环保护。 在外部电容器电极和保护环之间以及保护环的外边缘处提供应力控制。 电容器可以封闭在可以包含一个或多个电流互感器的接地壳体中。 该装置可用于故障检测和定位,并可与电力电缆或开关组合使用。

    Control devices
    4.
    发明授权
    Control devices 失效
    控制装置

    公开(公告)号:US4144481A

    公开(公告)日:1979-03-13

    申请号:US778257

    申请日:1977-03-16

    申请人: Graham J. Clarke

    发明人: Graham J. Clarke

    IPC分类号: H02P7/288 H02P5/16

    CPC分类号: H02P7/2885 Y10S388/915

    摘要: A control device for electronic apparatus is provided with a d.c. ironless motor coupled to a manually rotatable knob. As the knob is rotated a digital signal representative of the rotation is derived from the back e.m.f. of the motor.

    摘要翻译: 电子设备的控制装置设有直流 无铁马达耦合到手动旋转的旋钮。 当旋钮旋转时,表示旋转的数字信号从后面的e.m.f 的电机。