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660 条记录 (耗时 0.017 秒)

    Conference circuits for use in telecommunications systems
    1.
    发明授权
    Conference circuits for use in telecommunications systems 失效
    用于电信系统的会议电路

    公开(公告)号：US3924082A

    公开(公告)日：1975-12-02

    申请号：US43962774

    申请日：1974-02-04

    申请人： GEN ELECTRIC CO LTD

    发明人： OLIVER STEPHEN EDWARD ,  WINCH NICHOLAS RICHARD

    IPC分类号： H04M3/56

    CPC分类号： H04M3/561

    摘要： A conference circuit for use in a PCM system. ''n'' channels requiring conference are arranged serially in n-channel frames. Each frame of n channels is sampled by transfer to an n-stage cyclic shift register and circulated through the register once. n-1 of the shift register stages are permanently added to give every possible combination of n-1 of the n channels in a frame as the n channels circulate through the register. Each such combination of n-1 channels is then clearly the conference signal required by the remaining channel subscriber. The various combinations of n-1 channels are then simply distributed to the appropriate ''remaining'' channel subscribers.

    摘要翻译： 用于PCM系统的会议电路。 需要会议的'n'信道以n个信道帧的顺序排列。

    Protective devices for electric power transmission systems
    2.
    发明授权
    Protective devices for electric power transmission systems 失效
    电力传输系统的保护装置

    公开(公告)号：US3898530A

    公开(公告)日：1975-08-05

    申请号：US41928973

    申请日：1973-11-27

    申请人： GEN ELECTRIC CO LTD

    发明人： PEREZ-CAVERO LEONARDO

    IPC分类号： H02H3/38 ,  H02H3/26

    CPC分类号： H02H3/385 ,  H02H3/382

    摘要： A device for use in detecting earth faults in a polyphase electric power transmission system by monitoring the difference (e.g., in phase) between a selected parameter and polarising parameter which has a predetermined relation with a voltage which, for a fault to earth at a point at a distance not greater than said predetermined distance along the line from said device, has a value equal to the zero-sequence voltage at that point.

    摘要翻译： 一种用于检测多相电力传输系统中的接地故障的装置，通过监测与选定参数和极化参数之间的差异（例如同相），所述差异与极化参数具有预定的关系， 在距离所述装置的线路不大于所述预定距离的距离处，具有等于该点处的零序电压的值。

    Circuits for private automatic telephone exchange systems
    3.
    发明授权
    Circuits for private automatic telephone exchange systems 失效
    私人电话交换系统电路

    公开(公告)号：US3697704A

    公开(公告)日：1972-10-10

    申请号：US3697704D

    申请日：1970-10-01

    申请人： GEN ELECTRIC CO LTD

    发明人： JACOBS MICHAEL LAWRENCE

    IPC分类号： H04Q3/42 ,  H04Q1/38

    CPC分类号： H04Q3/42

    摘要： A detector circuit for use in a private exchange using pushbutton controlled ''''leg-signalling,'''' the circuit comprising four transistors different ones or combinations of which become conducting in response to currents resulting from the application of an alternating voltage to different combinations of terminations applied to the line wires by operation of respective pushbuttons at the extension. The combinations of terminations serve to indicate the digit values of the respective pushbuttons for the purpose of signalling to the exchange equipment the number of an extension to be called.

    摘要翻译： 一种用于使用按钮控制的“腿信令”的专用交换机中的检测器电路，该电路包括四个晶体管，其不同的或其组合响应于将应用交流电压的不同组合应用于 通过在延伸部处的各个按钮的操作来进行线路连接。 终端的组合用于指示各个按钮的数字值，以便向交换设备通知要被调用的分机的号码。

    Read-out circuits for electrical position-encoders
    4.
    发明授权
    Read-out circuits for electrical position-encoders 失效
    电子位置编码器的读出电路

    公开(公告)号：US3675235A

    公开(公告)日：1972-07-04

    申请号：US3675235D

    申请日：1970-08-11

    申请人： GEN ELECTRIC CO LTD

    发明人： WAYMAN CECIL JOHN

    IPC分类号： H03M1/00 ,  G08C9/00

    CPC分类号： H03M1/26

    摘要： A read-out circuit for a digital position encoder which reads directly in, say, a reflected binary code, and which is required to read in, say, a decimalized binary code. The direct read-out signals are biased in various ways e.g. by adding a fraction of one to another, and by simple d.c. biasing, so as to produce final output signals which have a basic digital cycle of other than the four-unit cycle of a reflected binary code, e.g. a 10unit cycle.

    摘要翻译： 用于数字位置编码器的读出电路，其直接读取反射的二进制代码，并且需要读入，例如十进制的二进制代码。 直接读出信号以各种方式被偏置，例如， 通过添加一个一个到另一个，并通过简单的d.c. 偏置，以便产生除反射二进制码的四个单位周期以外的基本数字周期的最终输出信号，例如。 一个10个单位的周期。

    Automatic private branch exchange with provision for operator assistance
    5.
    发明授权
    Automatic private branch exchange with provision for operator assistance 失效
    自动私人分支机构提供操作员协助

    公开(公告)号：US3643033A

    公开(公告)日：1972-02-15

    申请号：US3643033D

    申请日：1968-01-11

    申请人： GEN ELECTRIC CO LTD

    发明人： SMITHERS RONALD

    IPC分类号： H04Q3/62 ,  H04M3/60

    CPC分类号： H04Q3/625

    摘要： A P.A.B.X. using reed relay switches having a limited number of ''''service'''' units that are arranged to be brought into use as required. Each of these units has a speech transmission bridge arranged for connection between two different outlets of the main switching matrix of the exchange so as to enable a call connection to be set up through the unit involving two transits of the switching matrix. A free one of these units is taken into use under the manual control of an operator when an indicator lamp on the operator''s switchboard lights to show that there is a call awaiting attention. The operator accepts such a call by operating switches on the switchboard which extends supervisory, speech and control circuits to the allotted unit for the purpose of enabling the call to be supervised. The switchboard is arranged to enable a single operator to supervise up to five call at a time. Alternatively a ''''service'''' unit is automatically taken into use when a party to an existing call wishes to make an ''''inquiry'''' call to another extension without releasing the original call.

    摘要翻译： 一个P.A.B.X. 使用具有有限数量的“服务”单元的干簧继电器开关，其被布置为根据需要被使用。 这些单元中的每一个具有布置成用于在交换机的主交换矩阵的两个不同出口之间连接的语音传输桥，以便能够通过涉及交换矩阵的两个转换的单元来建立呼叫连接。 当操作人员的交换机上的指示灯亮起时，手动控制操作员可以免费使用这些设备，以显示有一个等待注意的电话。 操作员通过操作交换机上的开关来接收这样一个呼叫，其将监控，语音和控制电路扩展到所分配的单元，以便能够监听呼叫。 交换机被配置为使一个操作员能够一次监督多达五个呼叫。 或者，当现有呼叫的一方希望对另一分机进行“查询”呼叫而不释放原始呼叫时，“服务”单元被自动使用。

    Electric switches
    6.
    发明授权
    Electric switches 失效

    公开(公告)号：US3622924A

    公开(公告)日：1971-11-23

    申请号：US3622924D

    申请日：1970-08-17

    申请人： GEN ELECTRIC CO LTD

    发明人： HARCOURT MICHAEL DAVID

    IPC分类号： H01H67/26

    CPC分类号： H01H67/26

    摘要： A crossbar switch comprising a rectangular array of contact sets formed by intersecting wires. Each contact set is operated by an individual interposer member, each row of interposer members being moved by a select magnet armature into operative positions and each column of interposer members being driven, if in an operative position, to operate their respective contact sets. The travel of the select magnet armature is limited in one direction by a stop member and in the other by the magnet core which is itself biased against the stop member.

    Synchronizing arrangement for a pulse-communication receiver
    7.
    发明授权
    Synchronizing arrangement for a pulse-communication receiver 失效
    脉冲通信接收机的同步布置

    公开(公告)号：US3603735A

    公开(公告)日：1971-09-07

    申请号：US3603735D

    申请日：1969-07-07

    申请人： GEN ELECTRIC CO LTD

    发明人： CLEOBURY DONALD JACK

    IPC分类号： H04J3/06

    CPC分类号： H04J3/0605

    摘要： A pulse-code-modulation synchronizing arrangement for a system using a synchronizing pulse pattern having a first simple portion which occurs commonly at random in the transmitted signal and a second more extensive portion which is highly improbable at random. The receiver, in seeking synchronism, resets its phase at each genuine and false occurrence of the simple portion. Synchronism is confirmed if no further reset occurs during the extent of the second portion (which does not contain the simple portion). The above resetting is on a channel basis: digit synchronism is achieved by slipping a digit periodically with sufficient intervening time to obtain overall synchronism by channel resetting if the digit phase is in fact correct. Loss or absence of synchronism is rapidly determined by the closely repeated presence of the common first portion.

    Route selecting system in a telephone exchange
    8.
    发明授权
    Route selecting system in a telephone exchange 失效
    电话交换机中的路由选择系统

    公开(公告)号：US3599235A

    公开(公告)日：1971-08-10

    申请号：US3599235D

    申请日：1968-04-11

    申请人： GEN ELECTRIC CO LTD

    发明人： CHRISTOPHER DAVID

    IPC分类号： H04Q3/54 ,  H04Q3/56

    CPC分类号： H04Q3/54

    摘要： A telephone switching system, for example a P.A.B.X., has tandem-connected A, B and C switching stages connected between input speech paths and supervisory units of a plurality of different types which types are utilized for different types of call through the system. Each switching stage consists of a plurality of full-availability reed relay switch units. There is only a single A-B link between each A switch unit and each B switch unit and a single B-C link between each B switch unit and each C switch unit. Selection of a free route through the switching stages between an input path and a free supervisory unit of a particular type to which the path is to be connected is effected by selecting each C switch unit in turn and examining the pairs of links from each B switch unit to the A switch unit to which the line is connected and to the selected C switch unit to ascertain if there is a free route to that C switch unit. When a suitable C switch unit is found, the pairs of links terminating on the individual B switch units are examined in turn to find a suitable B switch unit. Finally, a free supervisory unit connected to the selected C switch unit is chosen and the required connection through the three stages can then be established.