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133 条记录 (耗时 0.011 秒)

    Protection switching for matrix of ferrite modules with redundant control
    45.
    发明授权
    Protection switching for matrix of ferrite modules with redundant control 有权

    公开(公告)号：US09871511B2

    公开(公告)日：2018-01-16

    申请号：US14321229

    申请日：2014-07-01

    申请人： Honeywell International Inc.

    发明人： Sean Forney

    IPC分类号： H03K17/81 ,  H03K17/687 ,  H03K17/00 ,  H03K17/80

    CPC分类号： H03K17/687 ,  H03K17/002 ,  H03K17/80 ,  H03K17/81

    摘要： A protection switching circuit includes a plurality of ferrite modules arranged in a matrix, wherein the matrix includes a plurality of columns and a plurality of rows. The protection switching circuit further includes a primary control module configured to select a specific ferrite module to be polarized and a redundant control module configured to select a specific ferrite module to be polarized, wherein the redundant control module is used when the primary control module is not used. The protection switching circuit further includes a plurality of first switches, wherein the plurality of first switches couples the plurality of columns of the matrix to a first and second charging circuit. The protection switching circuit further includes a plurality of second switches, wherein the plurality of second switches are organized into pairs, wherein each pair in the plurality of second switches couples a respective row of the matrix to a reference potential.

    Railroad track circuit vital relay control
    46.
    发明授权
    Railroad track circuit vital relay control 失效
    轨道电路重要继电器控制

    公开(公告)号：US5737173A

    公开(公告)日：1998-04-07

    申请号：US655700

    申请日：1996-06-03

    申请人： Daniel T. Ross ,  Brian D. Holt ,  James E. Moe

    发明人： Daniel T. Ross ,  Brian D. Holt ,  James E. Moe

    IPC分类号： H03K19/007 ,  H03K17/81

    CPC分类号： H03K19/007

    摘要： A railroad vital relay control circuit has a first input for receiving a reference alternating current signal of a selected frequency and a second input for receiving a track alternating current signal having the selected frequency of the reference signal and a predetermined phase and magnitude relationship therewith. A magnetic core provides a logical AND function and has two input arms and an intermediate output arm. There is a winding on each of the input arms and a winding on the output arm. There are frequency tuned voltage limiting circuit elements connecting the first input and a first one of the magnetic core input windings and the second input and the second input winding of the magnetic core. The magnetic core has an output winding on the intermediate arm which is connected to a vital relay. The input windings on the magnetic core are connected to produce flux in the same direction in the output arm. In phase signals of the selected frequency at the magnetic core input windings provide sufficient flux in the output arm to induce a signal in the output winding to hold the vital relay in an operated position.

    摘要翻译： 铁路重心继电器控制电路具有用于接收选定频率的参考交流信号的第一输入端和用于接收具有所选参考信号频率的轨道交流信号和与其预定的相位和幅度关系的第二输入端。 磁芯提供逻辑AND功能，并具有两个输入臂和一个中间输出臂。 每个输入臂上有一个绕组，在输出臂上有一个绕组。 存在连接第一输入和第一个磁芯输入绕组以及磁芯的第二输入和第二输入绕组的频率调谐电压限制电路元件。 磁芯在中间臂上具有连接到重要继电器的输出绕组。 磁芯上的输入绕组被连接以在输出臂中沿相同的方向产生磁通。 在磁芯输入绕组处的所选频率的同相信号在输出臂中提供足够的通量，以在输出绕组中感应信号以将重要继电器保持在操作位置。

    Keyboard with electronic hysteresis
    47.
    发明授权
    Keyboard with electronic hysteresis 失效
    键盘带电子迟滞

    公开(公告)号：US4390866A

    公开(公告)日：1983-06-28

    申请号：US235374

    申请日：1981-02-19

    申请人： Keith A. Engstrom

    发明人： Keith A. Engstrom

    IPC分类号： G11C19/00 ,  H03K17/81 ,  H03K17/972 ,  H03M11/02 ,  H04L13/16

    CPC分类号： H03K17/972 ,  G11C19/00 ,  H03K17/81 ,  H03M11/02 ,  H04L13/16

    摘要： A keyboard having a plurality of selectively operable matrix elements, each having an actuated and an unactuated state. The state of each matrix element is sequentially scanned and sensed and temporarily stored in a memory. A level detector is coupled to the matrix elements and to the memory means for comparison of the sensed state to a threshold level and for producing an output representative of each comparison. Feedback circuitry is coupled to the memory means for transmitting a feedback signal representative of the previous scan state of each matrix element. The level detector responds to the feedback signal to vary the relative levels of each of the sensed states and its respective threshold level in response to the previous scan state of the matrix element currently scanned.

    摘要翻译： 一种具有多个选择性操作的矩阵元件的键盘，每个具有致动和未致动状态。 每个矩阵元素的状态被顺序地扫描和感测并临时存储在存储器中。 电平检测器耦合到矩阵元件和存储器装置，用于将检测到的状态与阈值电平进行比较，并产生代表每个比较的输出。 反馈电路耦合到存储器装置，用于发送表示每个矩阵元素的先前扫描状态的反馈信号。 电平检测器响应于反馈信号，以响应于当前扫描的矩阵元素的先前扫描状态来改变每个感测状态的相对电平及其各自的阈值电平。