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    • 1. 发明授权
    • Interface circuit to quickly establish a loop current
    • 接口电路快速建立回路电流
    • US5329584A
    • 1994-07-12
    • US991459
    • 1992-12-16
    • Takashi Nagato
    • Takashi Nagato
    • H04Q3/42H04M3/00H04M19/00H04M3/22
    • H04M3/005H04M19/001
    • According to the invention, an interface circuit for quickly establishing a DC loop current in response to off-hook detection is provided by a circuit which uses a transistor, where its collector electrode is connected to the first one of the telephone lines; an emitter resistor connected between an emitter electrode of the transistor and the second one of the telephone lines; a bias resistor having a first terminal connected to the collector electrode; a Zener diode connected between a second terminal of the bias resistor and the second line; a first capacitor connected in parallel to the constant-voltage means; switching means connected between the second terminal of the bias resistor and a base electrode of the transistor for the switching means to be conductive in response to an off-hook signal; and charging means, typically formed of a series connection of a capacitor, a resistor and a Zener diode, connected in parallel to the bias resistor so as to allow a current to flow through the series connection to charge the first capacitor only during a transient of applying a Dc voltage from the telephone lines onto the transistor.
    • 根据本发明,通过使用晶体管的电路提供响应于摘机检测来快速建立DC环路电流的接口电路,其中集电极连接到第一个电话线; 连接在晶体管的发射极和第二电话线之间的发射极电阻; 偏置电阻器,其具有连接到所述集电极的第一端子; 连接在偏置电阻器的第二端子和第二线路之间的齐纳二极管; 与恒压装置并联连接的第一电容器; 连接在偏置电阻器的第二端子和用于开关装置的晶体管的基极之间的开关装置响应于摘机信号而导通; 以及通常由电容器,电阻器和齐纳二极管的串联连接形成的充电装置,该电容器,电阻器和齐纳二极管并联连接到偏置电阻器,以便允许电流流过串联连接,以在第一电容器的瞬态 将电话线上的Dc电压施加到晶体管上。
    • 3. 发明授权
    • Time-division multiplexer
    • 时分复用器
    • US06781985B1
    • 2004-08-24
    • US09624666
    • 2000-07-25
    • Peter James FederShoichi SageshimaTakashi Nagato
    • Peter James FederShoichi SageshimaTakashi Nagato
    • H04L1250
    • H04J3/1641H04Q11/04H04Q2213/13196H04Q2213/13292H04Q2213/13299H04Q2213/13393
    • Disclosed is a time-division multiplexer for demultiplexing, into individual time slots, time-division multiplexed data in a receive direction received from a network via a trunk unit, and sending the data to a prescribed tributary unit, and for multiplexing, to a prescribed time slot, data in a transmit direction which enters from tributary units and sending the data to the network via the trunk unit. The time-division multiplexer has a trunk bus to which a trunk unit is connected and a tributary bus to which tributary units are connected, and a time-slot interchange unit provided between these buses, wherein interchange of cross-connected time slots on the trunk side and time slots on the tributary side is performed dynamically by the time-slot interchange unit. Further, a common channel signaling controller is provided between the bus lines, wherein the common channel signaling controller performs control for dynamic assignment of time slots and sends a time-slot exchange request to the time-slot interchange unit.
    • 公开了一种时分多路复用器,用于将经由中继单元从网络接收的接收方向上的时分复用数据分离成各个时隙,并将数据发送到规定的支路单元,并将其复用到规定的 时隙,从支路单元进入发送方向的数据,并通过中继线单元将数据发送到网络。 时分多路复用器具有连接中继线单元的中继线总线和连接有支路单元的支路总线,以及在这些总线之间设置的时隙交换单元,其中交叉连接的时隙在主干 辅助侧的侧面和时隙由时隙交换单元动态地执行。 此外,在总线之间提供公共信道信令控制器,其中公共信道信令控制器执行时隙的动态分配控制,并向时隙交换单元发送时隙交换请求。
    • 5. 发明授权
    • Rolling bearing
    • 滚动轴承
    • US5997661A
    • 1999-12-07
    • US903723
    • 1997-07-31
    • Yoichi MatsumotoTakashi NagatoKazuo Sekino
    • Yoichi MatsumotoTakashi NagatoKazuo Sekino
    • F16C33/32C22C38/00C22C38/16C22C38/42C22C38/44F16C33/62C23C8/22C23C8/32
    • C22C38/42C22C38/44F16C33/62Y10S148/906Y10S384/912
    • A rotating shaft 4 is attached to an inner race 1, and an outer race 2 is fixed to a housing 5 so that the bearing is operated by the rotation of the rotating shaft 4. In this case, the inner race 1 is made to be the race on the rotating side, and the outer race 2 is made to be the race on the non-rotating side. The raw material composing the inner race 1, outer race 2 and rollers 3 is manufactured from alloy steel containing 4.5 weight % or less of Ni, and 0.5 weight % or less of Cu, and the average value of the Cu equivalent of the rollers 3 and the inner race 1 is set at a value higher than the Cu equivalent of the outer race 2. Thus, even in humid environments where water infiltrates into the lubricant, it is possible to make the rolling bearing have the same durable life as with rolling bearings which are used in normal environments. Accordingly, it is possible to provide rolling bearings endowed with superior durable life from the electrochemical viewpoint even when water infiltrates into the bearing lubricant.
    • 旋转轴4安装在内座圈1上,外座圈2固定在壳体5上,使得轴承通过旋转轴4的旋转而动作。在这种情况下,内圈1成为 旋转侧的座圈和外圈2成为非旋转侧的座圈。 构成内圈1,外圈2和辊3的原料由含有4.5重量%以下的Ni和0.5重量%以下的Cu的合金钢制成,辊3的Cu当量的平均值 并且内圈1被设定为高于外圈2的Cu当量的值。因此,即使在水浸入润滑剂的潮湿环境中,也可以使滚动轴承具有与滚动相同的耐用寿命 在正常环境中使用的轴承。 因此,即使在水渗透到轴承润滑剂中的情况下,也可以提供从电化学观点来看具有优异的耐用寿命的滚动轴承。
    • 6. 发明授权
    • Transmission apparatus for relaying different types of trunk signals
    • 用于中继不同类型的中继线信号的传输装置
    • US5875244A
    • 1999-02-23
    • US674852
    • 1996-07-03
    • Takashi Nagato
    • Takashi Nagato
    • H04M7/00H04Q3/00H04Q3/42H04Q11/04G08C19/00H04J15/00
    • H04Q3/0016H04Q2213/13031H04Q2213/13034H04Q2213/13176H04Q2213/13204H04Q2213/13216H04Q2213/13292H04Q2213/1332
    • A transmission apparatus for relaying different types of trunk signals, including a central processing unit including a reception counter processor which is inserted between a pair of exchanges and enables direct relay of exchange trunk signals (Sxt) and analog trunk signals (Sem) of a pulse ear and mouth (E&M) mode on a radio transmission line by counting the pulse width of the signals (Sem) and determining their type, a transmission counter processor which transmits the pulse E&M signals until the count of the pulse width inherent to the signals Sem corresponding to the signals Sxt is finished, and a logical operation unit which generates the corresponding signals Sxt based on the result of determination of the reception counter processor and drives the transmission counter processor based on the input signals Sxt, whereby it is possible to give an existing digital transmission apparatus handling E&M signals a function corresponding to a conventional higher rank exchange.
    • 一种用于中继不同类型的中继线信号的发送装置,包括中央处理单元,该中央处理单元包括插入在一对交换机之间的接收计数器处理器,并使能直接中继交换干线信号(Sxt)和脉冲的模拟中继线信号(Sem) 通过对信号(Sem)的脉冲宽度进行计数并确定其类型,在无线电传输线上进行耳朵和口(E&M)模式,发送计数器处理器,发送脉冲E&M信号,直到信号Sem固有的脉冲宽度的计数 对应于信号Sxt的逻辑运算单元,以及基于接收计数器处理器的确定结果生成相应信号Sxt的逻辑运算单元,并根据输入信号Sxt驱动发送计数器处理器,由此可以给出 处理E&M的现有数字传输设备发送对应于传统的更高等级交换的功能。
    • 7. 发明授权
    • Central monitoring system of a multiplex subscriber loop carrier
    • 多路复用用户环路载波的中央监控系统
    • US5400321A
    • 1995-03-21
    • US85966
    • 1993-06-30
    • Takashi Nagato
    • Takashi Nagato
    • H04M3/26H04M3/30H04M3/32H04Q11/04H04J1/16H04J3/14
    • H04M3/303H04M3/30H04M3/323H04Q11/04
    • A central monitoring system of a multiplex subscriber loop carrier has a remote terminal which includes a first subscriber line tester for testing first subscriber lines connected to subscriber terminals so as to detect a fault on a first subscriber line and outputting an alarm if the fault is detected. A central office terminal is connected to the remote terminal via a carrier line and to a local switch via second subscriber lines. The central office terminal includes a dummy fault generating circuit which represents the fault. Upon receiving the alarm via the carrier line, the dummy fault generating circuit is connected via a transfer switch to one of the second subscriber lines which corresponds to the first subscriber line having the fault thereon. Then, a second subscriber line tester provided in the local switch for testing the second subscriber lines detects the dummy fault generating circuit to provide a message informing that the fault is on the first subscriber line which corresponds to the second subscriber line having the dummy fault generating circuit connected thereto.
    • 复用用户环路载波的中央监控系统具有远程终端,该远程终端包括第一用户线路测试器,用于测试连接到用户终端的第一用户线路,以便检测第一用户线路上的故障,并且如果检测到故障则输出警报 。 中心局终端经由载波线连接到远程终端,经由第二用户线连接到本地交换机。 中心局终端包括代表故障的虚拟故障发生电路。 在经由载波线接收到报警后,虚拟故障发生电路经由转移开关连接到与其上具有故障的第一用户线对应的第二用户线之一。 然后,本地交换机中提供的用于测试第二用户线路的第二用户线路测试器检测虚拟故障产生电路,以提供消息,通知故障位于与具有伪故障产生的第二用户线路对应的第一用户线路上 电路。