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公开(公告)号：US4075431A
公开(公告)日：1978-02-21
申请号：US661660
申请日：1976-02-26
CPC分类号： H04Q3/521
摘要： A speech path system for a telephone exchange having crosspoint switches of a speech path network comprising semiconductor switching devices of four or more layers, including a memory circuit for storing the operating conditions of said switching devices, a drive circuit of a high A.C. impedance for actuating said switching devices in response to output signals from said memory circuit, a subscriber D.C. loop detection circuit of a high impedance provided at a subscriber terminal of said speech path network, and a speech current supply circuit with speech current switching means and a supply current detection circuit provided at a trunk terminal of said speech path network.
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2.发明授权
公开(公告)号：US4113988A
公开(公告)日：1978-09-12
申请号：US775619
申请日：1977-03-08
CPC分类号： H04Q3/521
摘要： A speech path apparatus in a space-division type electronic exchanger equipment wherein a plurality of switching networks each having controlled points and a plurality of trunks are divided into an appropriate number of packaging units, and a network controller and a trunk controller are provided for each packaging unit. Each of the network controllers and the trunk controllers includes a shift register for receiving a control signal sent from a central processing unit in serial form, a means for determining whether the received control signal is for its own unit and means for translating a control signal stored in the shift register to send it out in parallel form to the controlled point.
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3.发明授权
公开(公告)号：US4264895A
公开(公告)日：1981-04-28
申请号：US16824
申请日：1979-03-02
CPC分类号： H04Q3/521
摘要： A multi-stage switching network comprises a plurality of unitary switch matrices each including a number of cross-point circuits each of which in turn includes a memory circuit operatively connected to the associated cross-point switches in a speech path. The plurality of the unitary switch matrices are arranged in a matrix array in which each stage of the multi-stage switching network is constituted by the unitary switch matrices arrayed in at least one column thereof and interconnected through links. The memory circuit for performing ON/OFF control of the associated cross-point switches in each of the switch matrices incorporates therein at least three logical control signal input terminals to which at least an information signal for designating the switch matrix to be selected and information signals for designating a row and a column in the selected switch matrix are applied, the latter information signals being produced in common to all the switch matrices, whereby a given cross-point determined by these information signals in the selected matrix is selected and correspondingly controlled. The ON/OFF control of the cross-point switch is effected sequentially by a stage selecting information signal from stage to stage.
摘要翻译： 多级交换网络包括多个单位开关矩阵，每个开关矩阵包括多个交叉点电路，每个交叉点电路又包括可操作地连接到语音路径中的相关联的交叉点开关的存储器电路。 多个单位开关矩阵被排列成矩阵阵列，其中多级交换网络的每一级由排列在其至少一列中的并通过链路互连的整体开关矩阵构成。 用于对每个开关矩阵中的相关联的交叉点开关进行ON / OFF控制的存储电路在其中包括至少三个逻辑控制信号输入端，至少一个用于指定要选择的开关矩阵的信息信号和信息信号 用于指定所选开关矩阵中的行和列，后一信息信号被共同产生到所有开关矩阵中，由此选择由所选择的矩阵中的这些信息信号确定的给定交叉点并对其进行控制。 交叉点开关的ON / OFF控制由阶段选择信息信号顺序地进行。
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公开(公告)号：US4478680A
公开(公告)日：1984-10-23
申请号：US471459
申请日：1983-03-02
摘要： A method for treating an electrolytic diaphragm formed by adhering asbestos fibers to the surface of an electrolytic cathode made of a wire mesh or porous plate, which comprises permeating water glass into the diaphragm, then permeating a chloroprene latex into the water glass-treated diaphragm, and drying the treated diaphragm under heat.
摘要翻译： 一种用于处理由石棉纤维粘附到由丝网或多孔板制成的电解阴极的表面形成的电解膜的方法，该方法包括将透水玻璃放入隔膜中，然后将氯丁二烯胶乳渗入水玻璃处理的隔膜中， 并在加热下干燥经处理的隔膜。
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公开(公告)号：US4170536A
公开(公告)日：1979-10-09
申请号：US959782
申请日：1978-11-13
申请人： Keiji Kawasaki , Tetsuo Takeshita
发明人： Keiji Kawasaki , Tetsuo Takeshita
CPC分类号： C25B11/0447
摘要： A novel cathode for use in electrolysis of an aqueous solution of an alkali metal halide or water is provided which comprises a metallic cathode substrate and a powder of Raney nickel held on its surface partly embedded in a nickel layer deposited thereon from a nickel plating bath. The cathode has a considerably lower hydrogen overvoltage than ordinary cathodes. It can be produced by electrolytically depositing nickel on the surface of a metallic cathode substrate from an aqueous nickel plating bath containing a powder of Raney nickel suspended therein to form a co-deposited layer of the nickel and the Raney nickel powder.
摘要翻译： 提供了一种用于电解碱金属卤化物或水的水溶液的新型阴极，其包含金属阴极基底和保持在其表面上的表面的粉末，该表面部分地嵌入镍镀层沉积在其上的镍层中。 阴极具有比普通阴极显着更低的氢过电压。 可以通过从含有悬浮在其中的阮内镍粉末的含水镍电镀浴在金属阴极基板的表面上电沉积镍来形成镍和阮内镍粉的共沉积层来制造。
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公开(公告)号：US4031413A
公开(公告)日：1977-06-21
申请号：US646045
申请日：1976-01-02
IPC分类号： G11C11/411 , H03K3/288 , H03K3/352 , G11C15/04 , G11C11/40
CPC分类号： H03K3/288 , G11C11/4113 , H03K3/352
摘要： A memory circuit for providing a zero OFF-holding power under the logical control of three inputs comprises a memory cell including a semiconductor element circuit of equivalently four PNPN layer structure and a logical input section including at least one PNP transistor and NPN transistor with the collector of the PNP transistor connected to the base of the NPN transistor. The NPN transistor in the logical input section has its collector connected to the control gate of the memory cell, and logical input signals are applied to the emitter and base of the PNP transistor and the emitter of the NPN transistor in the logical input section, respectively.
摘要翻译： 一种用于在三个输入的逻辑控制下提供零关断保持功率的存储电路包括一个存储单元，该存储单元包括一个等效的四个PNPN层结构的半导体元件电路和一个逻辑输入区，该逻辑输入区包括至少一个PNP晶体管和NPN晶体管， 的PNP晶体管连接到NPN晶体管的基极。 逻辑输入部分的NPN晶体管的集电极连接到存储单元的控制栅极，逻辑输入信号分别施加到逻辑输入部分的PNP晶体管的发射极和基极以及NPN晶体管的发射极 。
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7.发明授权
公开(公告)号：US4385336A
公开(公告)日：1983-05-24
申请号：US213010
申请日：1980-12-04
CPC分类号： H04M3/30 , H04M19/001
摘要： This invention relates to a current supplying circuit for supplying a current to a terminal apparatus through a ring line and a tip line which are connected through resistance elements to a potential source and ground, respectively. This current supplying circuit includes respective detectors for generating first and second detection signals of amplitudes proportional to the currents flowing in the ring and tip lines, respectively, a circuit for generating a reference signal, and a comparator for comparing the signal difference between the first and second detection signals and the reference signal so as to produce a signal in accordance with the compared result, thus a shorted-to-ground fault on the ring line or tip line being detected by monitoring the signal produced in accordance with the compared result. After the shorted-to-ground fault is detected, the current supplying circuit is protected from breakdown.
摘要翻译： 本发明涉及一种电流供应电路，用于通过环形线路和尖端线路向终端设备提供电流，该电流线路分别通过电阻元件连接到电位源和接地。 该电流供给电路包括各自的检测器，用于分别产生与在环路和尖端线路中流动的电流成比例的振幅的第一和第二检测信号，用于产生参考信号的电路，以及比较器，用于比较第一和第 第二检测信号和参考信号，以根据比较结果产生信号，从而通过监视根据比较结果产生的信号来检测环形线或尖端线上的短路对地故障。 在检测到短路对地故障之后，保护电流供应电路不受破坏。
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公开(公告)号：US4360709A
公开(公告)日：1982-11-23
申请号：US184182
申请日：1980-09-04
申请人： Kazuo Hamazato , Junjiro Kitano , Tetsuo Takeshita
发明人： Kazuo Hamazato , Junjiro Kitano , Tetsuo Takeshita
CPC分类号： H04M3/2272
摘要： A circuit for detecting a closed loop formed by actuation of a telephone set, the loop being indicative of a connection between the telephone set and an exchange through a ring line and a tip line. The detecting circuit comprises generators for generating first and second detection signals having amplitudes proportional to a ring line current and a tip line current respectively, a summing circuit for summing the detection signals and a comparator for comparing the outputs of the summing circuit and a reference value and delivering an output depending upon the result of comparison.
摘要翻译： 一种用于检测通过致动电话机而形成的闭环的电路，所述回路指示通过环线和尖端线路在电话机和交换机之间的连接。 检测电路包括用于产生具有与环形线电流和尖端线电流成比例的振幅的第一和第二检测信号的发生器，用于对检测信号求和的加法电路和用于比较加法电路的输出和参考值的比较器 并根据比较结果输出输出。
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