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1. 发明授权

US5768341A Communications channel testing arrangement 失效
标题翻译：通信通道测试安排
公开(公告)号：US5768341A
公开(公告)日：1998-06-16
申请号：US436318
申请日：1995-08-17
申请人： Dennis Malcolm Pryor , Michael Challis , Luc Van Leeuw
发明人： Dennis Malcolm Pryor , Michael Challis , Luc Van Leeuw
IPC分类号： H03K17/00 , H03K20060101 , H03K17/687 , H04M3/30 , H04Q3/42 , H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： H04M3/301 , H03K17/6874 , H04M2201/14
摘要： A switching arrangement that can be connected in a communications channel that comprises a pair of lines between sets of terminal equipment, which comprises: (i) a series switch (1,2) for connection in each of the lines; (ii) a shunt switch for connection between the lines; and (iii) a control circuit (5) that can actuate the series switches (1,2) and can actuate the shunt switch on receipt of a signal sent along the channel: wherein the control circuit (5) can actuate the shunt switch and the series switches (1,2) on receipt of one or more signals but the shunt switch will remain closed over a different time period than that during which the series switches remain open, in order to allow different tests to be performed on the channel, and wherein one or more of the switches comprises a solid state switch.
摘要翻译： PCT No.PCT / GB93 / 02312 Sec。 371日期：1995年8月17日 102（e）日期1995年8月17日PCT 1993年11月10日PCT公布。出版物WO94 / 11948 PCT 日期1994年5月26日一种可以连接在包括终端设备组之间的一对线路的通信信道中的切换装置，其包括：（i）用于在每条线路中连接的串联开关（1,2）（ii）用于线路之间连接的分流开关; 以及（iii）可以致动所述串联开关（1,2）并且可以在接收到沿着所述通道发送的信号时致动所述分流开关的控制电路（5）：其中所述控制电路（5）可以致动所述分流开关和在接收到一个或多个信号时，串联开关（1,2），但分流开关将在与串联开关保持断开的不同时间段内保持关闭，以便允许在通道上执行不同的测试，并且其中一个或多个开关包括固态开关。

2. 发明授权

US06404608B1 Overcurrent protection device 失效
标题翻译：过电流保护装置
公开(公告)号：US06404608B1
公开(公告)日：2002-06-11
申请号：US08392661
申请日：1995-02-23
申请人： Dennis Malcolm Pryor , Michael Challis , Ian Paul Atkins
发明人： Dennis Malcolm Pryor , Michael Challis , Ian Paul Atkins
IPC分类号： H02H300
CPC分类号： H02H3/087 , H02H3/07
摘要： An overcurrent protection arrangement comprises a switching circuit that is intended to be series connected in a line of the circuit to be protected and which will allow normal circuit currents to pass but will open when subjected to an overcurrent. The arrangement includes a pulse generator which will generate pulses when the switching circuit has opened that reset, or attempt to reset, the switching circuit to its conducting state. Only a predetermined finite number of pulses or pulses for a predetermined finite time are generated, so that the circuit will quickly function again after having been subjected to a current transient but will not continually attempt to reset in the case of equipment faults.
摘要翻译：过电流保护装置包括一个开关电路，该开关电路旨在串联连接在被保护电路的一行中，并且允许正常的电路电流通过，但在经受过电流时将断开。该装置包括脉冲发生器，当开关电路打开该复位或尝试将开关电路复位到其导通状态时，脉冲发生器将产生脉冲。仅产生预定有限时间的预定有限数量的脉冲或脉冲，使得电路在已经经历电流瞬变之后将再次快速地起作用，但在设备故障的情况下不会连续尝试复位。

3. 发明授权

US5652575A Maintenance termination unit for telephone circuits 失效
标题翻译：电话线路维护终端单元
公开(公告)号：US5652575A
公开(公告)日：1997-07-29
申请号：US360756
申请日：1994-12-21
申请人： Dennis Malcolm Pryor , Michael Challis
发明人： Dennis Malcolm Pryor , Michael Challis
IPC分类号： H03K17/74 , H02H3/10 , H02H9/04 , H04M3/18 , H04M3/30 , H04B3/46
CPC分类号： H04M3/301 , H02H3/10 , H04M3/18 , H02H9/041
摘要： A maintenance termination unit (MTU) for use in telephone circuits. The MTU comprises a switching arrangement which can be connected between sets of terminal equipment in a communications channel comprising a pair of lines. The switching arrangement comprises: a DC voltage window detector circuit which, in use, is connected between the lines and is responsive to a voltage between the lines; and series switching circuits, which, in use, are connected in the lines. The arrangement may also include a shunt switching circuit, which, in use, is connected between the lines. The arrangement includes low pass filters associated with the switching circuits. The DC voltage window detector circuit will actuate the switching circuits when the DC voltage between the lines is within respective predetermined bands, but will not actuate the switching circuits when the DC voltage between the lines is not within the respective predetermined bands. The switching circuits can be remotely actuated by means of a DC signal on the channel. The low pass filters have a cut-off frequency which is sufficiently low to prevent the switching circuits from being actuated by a ringing signal on the channel.
摘要翻译： PCT No.PCT / GB93 / 01376 Sec。 371日期1994年12月21日 102（e）日期1994年12月21日PCT提交1993年6月30日PCT公布。公开号WO94 / 01961 日期1994年1月20日用于电话线路的维护终端单元（MTU）。 MTU包括可以在包括一对线路的通信信道中连接在一组终端设备之间的交换装置。开关装置包括：直流电压窗检测器电路，其在使用中连接在线路之间并响应于线路之间的电压; 和在使用中连接在一起的串联开关电路。该布置还可以包括在使用中连接在线之间的分流开关电路。该装置包括与开关电路相关联的低通滤波器。当线路之间的直流电压在相应的预定频带内时，直流电压窗口检测器电路将致动开关电路，但是当线路之间的直流电压不在相应的预定频带内时，直流电压窗口检测器电路将不致动开关电路。开关电路可以通过通道上的直流信号进行远程启动。低通滤波器具有足够低的截止频率，以防止开关电路被通道上的振铃信号驱动。

4. 发明授权

US6118641A Overcurrent protection device 失效
标题翻译：过电流保护装置
公开(公告)号：US6118641A
公开(公告)日：2000-09-12
申请号：US84255
申请日：1993-07-07
申请人： Ian Paul Atkins , David Mansel Williams , Dennis Malcolm Pryor
发明人： Ian Paul Atkins , David Mansel Williams , Dennis Malcolm Pryor
IPC分类号： H02H3/087 , H02H9/00
CPC分类号： H02H3/087
摘要： A two terminal circuit protection arrangement that: (1) is intended to be series connected in a line of the circuit; (2) comprises (a) a series switching transistor (1) that controls the line current, (b) a control transistor (4) that controls the base or gate voltage of the switching transistor and is responsive to an overcurrent through the switching transistor, and (c) a voltage source, for example a battery (3), a dc-dc converter (58/59) or a Seebeck device (43), applied to the base or gate of the switching transistor which biases the switching transistor into or toward conduction in normal operation; and (3) is capable of being remotely reset into a conducting state by stopping current in the line. The arrangement enables the initial voltage drop that is required to turn the switching transistor (1) on to be reduced or eliminated while requiring relatively little current from the voltage source. The arrangement can be reset remotely by briefly removing the voltage source or load from the circuit.
摘要翻译： PCT No.PCT / GB92 / 00027 Sec。 371日期：1993年7月7日 102（e）日期1993年7月7日PCT提交1992年1月7日PCT公布。出版物WO92 / 12561 日期1992年7月23日两端电路保护装置：（1）旨在串联在电路的一行中; （2）包括（a）控制线路电流的串联开关晶体管（1），（b）控制开关晶体管的基极或栅极电压的控制晶体管（4），并响应于通过开关晶体管的过电流，以及（c）施加到开关晶体管的基极或栅极的电压源，例如电池（3），dc-dc转换器（58/59）或塞贝克装置（43），其偏置开关晶体管在正常操作中进入或向导传导; 和（3）能够通过停止线路中的电流而远程复位成导通状态。该装置能够使开关晶体管（1）导通所需的初始电压降降低或消除，同时需要来自电压源的相对较小的电流。通过短暂地从电路中去除电压源或负载，可以远程重置该装置。

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