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236 条记录 (耗时 0.013 秒)

    Interlock for two asynchronous systems
    71.
    发明授权
    Interlock for two asynchronous systems 失效
    两个异步系统的互锁

    公开(公告)号：US3586786A

    公开(公告)日：1971-06-22

    申请号：US3586786D

    申请日：1969-06-20

    申请人： AUTOMATIC ELECT LAB

    发明人： WOLFF ROBERT W

    IPC分类号： H04Q3/54 ,  H04Q3/18

    CPC分类号： H04Q3/54

    摘要： A telephone switching system matrix arrangement having two originating markers available to serve lines calling for service. Those portions of the two markers responsive to a call for service are shown and include an enabling interlock circuit. A part of this circuit is located in each marker. This circuit consists of a modified ring counter having two flip-flops in each marker that are operated by that marker''s clock. A decoding circuit in each marker is used to enable that marker upon the condition that only one of the two flip-flops is in the set condition.

    Crosspoint network path finding system
    72.
    发明授权
    Crosspoint network path finding system 失效
    CROSSPOINT网络路径查找系统

    公开(公告)号：US3585309A

    公开(公告)日：1971-06-15

    申请号：US3585309D

    申请日：1968-12-09

    申请人： STROMBERG CARLSON CORP

    发明人： GUELDENPFENNIG KLAUS

    IPC分类号： H04Q3/54 ,  H04Q3/56

    CPC分类号： H04Q3/54

    摘要： A path finding system for a telephone switching system having a plurality of reed relay matrix stages is described. Different groups of junctors are connected to different matrices of the stage at one end of the system, while different matrices of the stage at the opposite end of the system are connected to line circuits. Links are established through the stage at the junctor end of the system by connecting a free junctor to its associated matrix and then scanning the matrix associated with the free junctor to rapidly select a free link therein. Connections are then automatically extended through the remaining stages to the line circuit of the subscriber with respect to which communication services are desired.

    摘要翻译： 一种用于通过交换网络互连电路的路径寻找系统，其中所述网络包括互连以在连接到所述网络的相对端的电路之间提供多个路径的多个矩阵级，并且其中每个级被分成单独的矩阵组。 矩阵组包括具有控制和保持线圈的交叉点继电器。 标记线圈通过用于控制交叉点继电器的致动的标记引线在相邻级之间互连，并且保持线圈通过用于维持继电器被致动的保持引线互连。 保护继电器包含在两个矩阵级之间的标记引线上。 要连接的网络的相对端的电路被标记。 连接到两个网络阶段之间的所选矩阵组之一的个体保持线路的无忙碌条件被扫描以找到空闲路径。 响应于自由保持引线的检测的电路通过网络完成连接并互连标记的电路。

    Apparatus for monitoring a plurality of relays
    73.
    发明授权
    Apparatus for monitoring a plurality of relays 失效
    监测多重继电器的装置

    公开(公告)号：US3560664A

    公开(公告)日：1971-02-02

    申请号：US3560664D

    申请日：1969-02-06

    申请人： AUTOMATIC ELECT LAB

    发明人： STICH FREDERICK A

    IPC分类号： H04Q3/54 ,  H04M3/22

    CPC分类号： H04Q3/54

    摘要： A circuit for monitoring the status of a plurality of relays includes a plurality of monitoring devices each having a control winding connected across a contact of a relay being monitored, and drive and sense windings connected to drive and detector circuits, respectively. The drive circuit includes a switching transistor which momentarily connects the drive windings of a plurality of devices to a current source permitting a current pulse to traverse the windings. If the contact being monitored is open the current pulse induces a voltage in the sense winding, but if the contact is closed the control winding is shunted out and only a noise pulse is induced in the sense winding, The switching transistor is controlled by a differential amplifier which compares a voltage fed back from the output of the switching transistor to a reference voltage, amplifies the difference, and regulates the base drive to the switching transistor to compensate for changes in the impedance of the monitoring devices and maintain the magnitude of the current pulse constant.