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10 条记录 (耗时 0.01 秒)

    Coded telephone line testing equipment
    1.
    发明授权
    Coded telephone line testing equipment 失效
    编码电话线路测试设备

    公开(公告)号：US3922508A

    公开(公告)日：1975-11-25

    申请号：US43280674

    申请日：1974-01-14

    申请人： MAGNETIC CONTROLS CO

    发明人： BRADY BRIAN B

    IPC分类号： H04B3/46 ,  H04M3/30

    CPC分类号： H04B3/46 ,  H04M3/301

    摘要： Telephone line testing equipment in which a series of alternating current tone pulses are transmitted from the central office along the line to a sensing means placed at a remote point in the circuit. The series of pulses are transmitted in a coded sequence. The sensing means receives the pulse sequence, decodes it, and connects the telephone line to suitable loopback testing circuits if the proper code is received.

    摘要翻译： 电话线路测试设备，其中一系列交流音调脉冲从中心局沿着线路发送到放置在电路中的远程点处的感测装置。 脉冲序列以编码序列传输。 如果接收到适当的代码，感测装置接收脉冲序列，对其进行解码，并将电话线连接到合适的环回测试电路。

    Telephone looptest system
    2.
    发明授权
    Telephone looptest system 失效
    电话环路系统

    公开(公告)号：US3843848A

    公开(公告)日：1974-10-22

    申请号：US32314073

    申请日：1973-01-12

    申请人： MAGNETIC CONTROLS CO

    发明人： COX R

    IPC分类号： H04M3/26 ,  H04B3/46 ,  H04M3/30

    CPC分类号： H04M3/301

    摘要： Apparatus is provided for remote testing of the condition of a telephone communication line to the point of interfacial connection between the line and customer equipment. The apparatus includes sensing means responsive to a trigger signal inserted onto the line at the telephone company end, the trigger signal being an alternating current tone burst of a given frequency, given minimum time duration, and given minimum voltage level. The sensed trigger signal activates a switch means at the point of customer interface, with the switch means in its quiescent, first condition maintaining the integrity of the line and in its second, activated condition disconnecting the line and inserting onto the line for a given period of time a given electrical impedance and a disconnect indicator. The sensing means is responsive to the presence of the trigger signal independent of the condition of any equipment beyond the point of customer interface when the switch means is in its first condition. Means for testing the condition of the telephone line with the given electrical impedance on the line are provided at the telephone company end of the line.

    Electrical connector
    3.
    发明授权
    Electrical connector 失效
    电气连接器

    公开(公告)号：US3873785A

    公开(公告)日：1975-03-25

    申请号：US40947173

    申请日：1973-10-25

    申请人： MAGNETIC CONTROLS CO

    发明人： LIEBERMAN WALTER G

    IPC分类号： H01R13/703 ,  H01R24/46 ,  H01R33/30

    CPC分类号： H01R24/46 ,  H01R13/703 ,  H01R2103/00 ,  Y10S439/944

    摘要： An electrical connector jack having an outer cylindrical housing and a central coaxial conducting member which is slidable along its axis when receiving a plug so as to complete a contact with a second central coaxial conductor and simultaneously open a switch connected to a second central coaxial conductor so as to disconnect a terminating resistance or an alternate circuit path. The second conductor is connected so that there is no unused stub to cause reflections.

    摘要翻译： 一种电连接器插座，其具有外圆柱形壳体和中心同轴导电构件，当接收插头时可沿其轴线滑动，以便与第二中心同轴导体完成接触，同时打开连接到第二中心同轴导体的开关， 以断开终端电阻或备用电路路径。 第二导体被连接，使得没有未使用的短截线引起反射。

    Telephone isolation jack panel
    4.
    发明授权
    Telephone isolation jack panel 失效
    电话隔离插座面板

    公开(公告)号：US3927275A

    公开(公告)日：1975-12-16

    申请号：US52096474

    申请日：1974-11-05

    申请人： MAGNETIC CONTROLS CO

    发明人： DEITCH JAMES C ,  ROBERT LAWRENCE A

    IPC分类号： H04M1/74 ,  H04Q1/02

    CPC分类号： H04M1/745 ,  Y10S439/911

    摘要： A telephone equipment jack panel for use in circuits where high voltages may be present wherein each jack is surrounded by and enclosed in a plastic support. A plurality of these supports are mounted in a row on a base and further enclosed by a cover which provides access to the jacks only through holes positioned a predetermined distance from the entrance ends of the jacks so that the jacks may be reached only by the insertion of a special highly insulated plug.

    摘要翻译： 一种用于可能存在高电压的电路中的电话设备插座面板，其中每个插孔被塑料支架包围并封闭在塑料支架中。 多个这些支撑件一排地安装在基座上并且进一步由盖子包围，盖子仅通过位于与插座的入口端隔开预定距离的孔口来访问插孔，使得千斤顶可以仅通过插入件到达 一个特别高度绝缘的插头。

    Electrical jack
    5.
    发明授权
    Electrical jack 失效
    电气插座

    公开(公告)号：US3822415A

    公开(公告)日：1974-07-02

    申请号：US36636373

    申请日：1973-06-04

    申请人： MAGNETIC CONTROLS CO

    发明人： DEITCH J

    IPC分类号： H01R24/58 ,  H05K1/18 ,  H01R17/18

    CPC分类号： H01R24/58 ,  H01R2107/00

    摘要： An electrical jack of the type adapted for side-by-side mounting in an electrical jack panel which includes a pair of frame members each having a portion to which are connected a plurality of jack springs separated by insulating blocks and each being spaced from that same portion of the other frame member by a spacing block disposed between said portions to prevent relative movement thereof and which is offset to enable adjacent jacks to be interlocked with each other.

    摘要翻译： 一种电气插座，其类型适于并排安装在电插座面板中，电插座面板包括一对框架构件，每个框架构件的一部分连接有被绝缘块分隔开的多个千斤顶弹簧，并且每个与该相同的间隔开 通过设置在所述部分之间的间隔块来限制另一框架构件的一部分，以防止其相对移动，并且偏移以使得相邻插口能够彼此联锁。

    Telephone monitor circuit
    6.
    发明授权
    Telephone monitor circuit 失效
    电话监控电路

    公开(公告)号：US3872266A

    公开(公告)日：1975-03-18

    申请号：US42436773

    申请日：1973-12-13

    申请人： MAGNETIC CONTROLS CO

    发明人： BAXTER JR VERNON A

    IPC分类号： H04M3/40 ,  H04M3/56 ,  H04M3/22

    CPC分类号： H04M3/40 ,  H04M3/56

    摘要： A circuit for listening to and talking on a four wire telephone circuit to monitor the condition thereof in which amplification is achieved in both directions without the use of separate wires by utilizing a phase shifted automatic cancelling circuit to prevent uncontrolled feedback but still provide a limited side tone feedback.

    摘要翻译： 一种用于在四线电话电路上聆听和通话的电路，用于监视其条件，其中通过利用相移自动取消电路来防止不受控制的反馈但仍提供有限的一侧，而不使用单独的导线来实现两个方向的放大 音调反馈。