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1. 发明授权

US4984262A Digital service unit 失效
标题翻译：数字服务单位
公开(公告)号：US4984262A
公开(公告)日：1991-01-08
申请号：US487031
申请日：1990-03-02
申请人： Kiyomi Kumozaki , Seiichi Yamano , Ryoichi Komiya
发明人： Kiyomi Kumozaki , Seiichi Yamano , Ryoichi Komiya
IPC分类号： H04M3/24 , H04Q11/04
CPC分类号： H04Q11/045 , H04M3/245
摘要： Network termination equipment including structure for transmitting signals back for loopback test. This can test all the functions of the unit by executing the loopback test only after having verified the normal operation of the circuits related to a call origination.

2. 发明授权

US5539564A Point-to-multipoint optical transmission system 失效
标题翻译：点对多点光传输系统
公开(公告)号：US5539564A
公开(公告)日：1996-07-23
申请号：US308498
申请日：1994-09-21
申请人： Kiyomi Kumozaki , Seiichi Yamano , Noriki Miki , Ryuichi Watanabe , Shinichi Aoyagi , Yasuyuki Okumura , Yoshihiro Takigawa
发明人： Kiyomi Kumozaki , Seiichi Yamano , Noriki Miki , Ryuichi Watanabe , Shinichi Aoyagi , Yasuyuki Okumura , Yoshihiro Takigawa
IPC分类号： H04B10/25 , H04Q11/00 , H04B10/12 , H04B10/20
CPC分类号： H04B10/2503 , H04Q11/0062 , H04Q11/0067 , H04Q2011/0015 , H04Q2011/0047 , H04Q2011/0081
摘要： A point-to-multipoint communication system is presented to enable a reliable, high quality communication using multiplexed optical signals between a central office equipment and a plurality of subscriber's equipment. The system is provided with a plurality of office transceivers in the central office equipment, and the each of the subscribers is provided with at least one subscriber transceiver. The system is designed so that a redundancy system is built-in by providing one of either the office transceivers, a plurality of subscriber's transceivers or the optical connection device, to connect the two sets of transceivers at all times. One of these redundancy systems provides an operating connection between each of the office transmitters which are connected to the office transceivers and each of the subscriber transmitters which are connected to the subscriber transceivers. Therefore, when a malfunction occurs somewhere in the optical network, the least number of the malfunctioning components need to be switched over the the normally functioning system to maintain continued communication services. The present communication system is designed with the least number of active components, therefore, the failure probability is significantly decreased, and repairs if necessary can be preformed quickly. The overall effect of the present system is that interactive point-to-multipoint communication services of high quality and reliability are provided at reasonable cost.
摘要翻译：提出了一种点对多点通信系统，以使得能够在中心局设备和多个用户设备之间使用复用光信号实现可靠，高质量的通信。该系统在中心局设备中设置有多个办公收发器，并且每个用户设置有至少一个订户收发器。该系统被设计成通过提供办公收发器，多个用户的收发器或光学连接装置之一来内置冗余系统，以便在任何时候连接两组收发器。这些冗余系统中的一个提供连接到办公收发器的每个办公室发射机和连接到订户收发器的每个用户发射机之间的操作连接。因此，当在光网络中的某处发生故障时，最少数量的故障组件需要在正常运行的系统上切换，以保持持续的通信服务。本通信系统被设计为具有最少数量的有源部件，因此，故障概率显着降低，并且如果需要可以快速进行修理。本系统的整体效果是以合理的成本提供高质量和可靠性的交互式点对多点通信服务。

3. 发明授权

US4507721A DC-DC Converter for remote power feeding 失效
标题翻译： DC-DC转换器用于远程供电
公开(公告)号：US4507721A
公开(公告)日：1985-03-26
申请号：US515754
申请日：1983-07-21
申请人： Seiichi Yamano , Haruo Ogiwara
发明人： Seiichi Yamano , Haruo Ogiwara
IPC分类号： H02M3/335 , H02M1/14
CPC分类号： H02M3/335
摘要： A floating type DC-DC converter for remote power feeding is connected via a power separating filter to a signal line on which an AC signal is superimposed on DC power. The DC power separated by the power separating filter is stored in an input capacitor and is supplied by a switching operation of a switching element to the primary winding of a transformer and AC power induced in its secondary winding is supplied to an output capacitor after being rectified by a rectifying element. An electrostatic shield layer is interposed between the primary and secondary windings of the transformer and is connected to the capacitor connected to one of the primary and secondary windings. Rectifying element or switching element connecting means is provided by which an AC voltage induced in the winding portion on one side of the center winding point of the other of the primary and secondary windings and an AC voltage induced in the winding portion on the other side of the center winding point of said other winding are made substantially symmetrical with respect to the center winding point, opposite in polarity and substantially equal in amplitude to each other.
摘要翻译：用于远程供电的浮动型DC-DC转换器经由功率分离滤波器连接到其上叠加有AC信号的信号线上。由功率分离滤波器分离的直流电力存储在输入电容器中，并通过开关元件的开关操作提供给变压器的初级绕组，并且在其次级绕组中感应的AC电力在整流后被提供给输出电容器由整流元件。静电屏蔽层介于变压器的初级绕组和次级绕组之间，并连接到连接到初级和次级绕组之一的电容器。提供整流元件或开关元件连接装置，通过该整流元件或开关元件连接装置，在初级和次级绕组中另一个的中心绕组的一侧的绕组部分中感应的AC电压和在另一侧的绕组部分中感应的AC电压所述另一个绕组的中心绕组相对于中心绕组点基本上对称，其极性相反并且基本上彼此相等。

4. 发明授权

US4833691A Line equalizer 失效
标题翻译：线均衡器
公开(公告)号：US4833691A
公开(公告)日：1989-05-23
申请号：US149021
申请日：1988-01-27
申请人： Hiroshi Takatori , Osamu Matsuhara , Seiichi Yamano
发明人： Hiroshi Takatori , Osamu Matsuhara , Seiichi Yamano
IPC分类号： H04B3/04 , H03H15/00 , H03H17/00 , H03H19/00 , H03H21/00 , H04L25/03
CPC分类号： H04L25/03025 , H03H19/004 , H04L25/03057
摘要： A line equalizer for eliminating a precursor interference component and postcursor interference components from a pulse signal inputted from a transmission line. A precursor equalizer takes a sum of a signal derived from the input pulse signal retarded by a fundamental period and a signal derived from the input pulse signal multiplied by a coefficient a. A decision circuit decides the threshold level of an output pulse signal from the precursor equalizer to output a predetermined signal. A controller controls the coefficient a of the precursor equalizer on the basis of the signal from the decision circuit, etc.
摘要翻译：一种线均衡器，用于消除从传输线输入的脉冲信号的前驱干扰分量和后脉冲干扰分量。前驱均衡器取从由基本周期延迟的输入脉冲信号和从输入脉冲信号导出的信号乘以系数a的信号的和。决定电路决定来自前驱均衡器的输出脉冲信号的阈值电平，输出规定的信号。控制器根据来自判定电路的信号等来控制前驱均衡器的系数a。

5. 发明授权

US4115111A Free-cutting structural steel for machines 失效
标题翻译：机械自由切割结构钢
公开(公告)号：US4115111A
公开(公告)日：1978-09-19
申请号：US761954
申请日：1977-01-24
申请人： Tetsuro Itoh , Tetsuo Takahashi , Atsuyoshi Kimura , Seiichi Yamano
发明人： Tetsuro Itoh , Tetsuo Takahashi , Atsuyoshi Kimura , Seiichi Yamano
IPC分类号： C22C38/60
CPC分类号： C22C38/60
摘要： The present invention relates to a free-cutting structural steel for machines characterized by containing a range of 30-100 g/steel ton of oxide inclusions mainly composed of SiO.sub.2 40-60%, CaO 13-30% and Al.sub.2 O.sub.3 25-40%, the balance being less than 20% of other oxides and calcium 0.0002-0.0010%, and at least one of the following elements; lead 0.03-0.30% and sulfur 0.035-0.10%.
摘要翻译：本发明涉及一种用于机器的自由切割结构钢，其特征在于包含主要由SiO 2 40-60％，CaO 13-30％和Al 2 O 3 25-40％组成的30-100g /钢吨氧化物夹杂物的范围，余量小于其他氧化物和钙0.0002-0.0010％的钙的20％，以及至少一种以下元素; 铅0.03-0.30％，硫0.035-0.10％。

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