专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS55128959A RECEPTION AND IDENTIFICATION SYSTEM FOR SIGNAL OUTSIDE AURAL BAND 失效
公开(公告)号：JPS55128959A
公开(公告)日：1980-10-06
申请号：JP3548879
申请日：1979-03-28
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： OGAWA YOUICHI , SHIMIZU HIROSHI , KIKUTA TAKASHI , TANAKA MASAO , TACHIKA SHINJI
IPC分类号： H04M15/00 , H04M17/00 , H04M17/02 , H04Q1/30
摘要： PURPOSE:To secure the identification for the stored coins by receiving for process the AC signals outside the aural band featuring the different time duration according to the stored coins through the public telephone to which the different types of coins can be used together. CONSTITUTION:Public telephone SUB for use of different types of coins together is connected to pay station outgoing trunk OGT-CH via line link network LLN of the electronic exchange and trunk link network TLN each as well as to AC signal reception circuit RCVE. After receiving the pole reversing pulse in the form of the coin storage signal, telephone SUB sends the AC signals outside the aural band showing the types of the stored coins to the exchange with the time duration made different between the small- and large-amount coins. This AC signal is rectified via RCVE and then the relay is actuated to be informed to the CPU via trunk scanner TSCN. At TSCN the pulses corresponding to the continuous time of the AC signals are generated, and then these pulses are scanned in the time-division way. In such way, the continuous time of the AC signal is known, thus enabling identification for the types of coins.

2. 发明专利

JPS55128961A INTRAAOFFICE RECORDING SYSTEM FOR PUBLIC TELEPHONE SET 失效
公开(公告)号：JPS55128961A
公开(公告)日：1980-10-06
申请号：JP3549079
申请日：1979-03-28
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： HASHIMOTO MASASHI , SHIMIZU HIROSHI , HASEGAWA TERUO , YAMAZAKI AKIO , INOUE SABUROU
IPC分类号： H04M15/00 , H04M17/00 , H04M17/02
摘要： PURPOSE:To register the calling frequency corresponding to the stored coins to the call meter corresponding to the public telephone, by receiving the coin storage signals of different types at the telephone exchange from the public telephone and then transmitting the signals corresponding to the types of stored coins to the control unit. CONSTITUTION:When public telephone SUB gives a call, the SUB is connected to trunk TRK and coin storage signal receiver REC by control unit CONT of the telephone exchange and via call line l1, network N and call line l2 each. When the coins are stored in the SUB, the signals corresponding to the stored coins are sent to the SUB and then received at the REC. And the REC identifies the types of coins stored in the SUB via the reception signals, and then transmits the signal to control lead 1 or 2 corresponding to the types of coins and against the CONT. The CONT knows that the signal is sent from lead 1 or 2 and then identifies the coins stored to register the corresponding calling frequency to call meter MET corresponding to the public telephone set via control lead 3.

3. 发明专利

JPS5374880A INPEDANCE MATCHING DEVICE 失效
公开(公告)号：JPS5374880A
公开(公告)日：1978-07-03
申请号：JP15037476
申请日：1976-12-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIBORI KOUICHI , TAKEZAWA JIYUNICHI , SHIMIZU HIROSHI , KANETOU HIDETOSHI
IPC分类号： H01J23/24 , H01J23/36 , H01J23/40 , H01P5/08
摘要： PURPOSE:To improve the matching characteristic by providing a spacer containing a cavity of an appropriate size at the input/output coupling part of lowspeed circuit.

4. 发明专利

JPH0483181A AUTOMATIC TESTING DEVICE FOR PAIR IDENTIFICATION 失效
公开(公告)号：JPH0483181A
公开(公告)日：1992-03-17
申请号：JP19866790
申请日：1990-07-26
申请人： TOKYO TSUUSHINKI KOUGIYOU KK , NIPPON TELEGRAPH & TELEPHONE
发明人： ENDO YUJI , SHIMIZU HIROSHI
IPC分类号： G01R31/02
摘要： PURPOSE:To automatically enable pair identification against its conductor number without arranging measures at both ends by providing means for transmitting test signals out of a voice band to a feed line leading to one end of a multiconductor cable to be tested. CONSTITUTION:A switching box portion B installed inside a station has a relay matrix 52 so formed as to selectively connect each terminal and the feed line of a cable C to be tested to the test spring of an MDF(main wiring board), and the switching box portion B is controlled by a control signal transmitted from a controller portion A via a control cable Lc and performs selective control action. A controller connected to the manhole side transmits a test signal whose frequency is out of a voice band(e.g. 10Hz) via a feed line terminal 10 to the feed line of the cable C to be tested and a conductor number to which the test signal should be sent back is designated by a control signal transmitted from modem/voice terminals 12, 13 to the control cable Lc and further a conductor to which the test signal has been sent back is detected by a probe line terminal 11 and a detector for test signals. Checking is thus automated and there is no need for measurers to be arranged at both ends.

5. 发明专利

AU3894978A DIGITAL SWITCHING SYSTEM 未知
公开(公告)号：AU3894978A
公开(公告)日：1980-02-21
申请号：AU3894978
申请日：1978-08-16
申请人： NIPPON ELECTRIC CO
发明人： SHIMIZU HIROSHI
IPC分类号： H04Q11/04 , H04J3/02 , H04L5/22

6. 发明专利

CA1110745A TIME DIVISION DIGITAL SWITCHING SYSTEM 未知
公开(公告)号：CA1110745A
公开(公告)日：1981-10-13
申请号：CA309462
申请日：1978-08-16
申请人： NIPPON ELECTRIC CO
发明人： SHIMIZU HIROSHI
IPC分类号： H04Q11/04
摘要： The invention disclosed pertains to time division switching systems used in digital telephone switching and in data communication. In prior, systems, the maximum number of simultaneous connections between pairs of subscribers is half the number of time slots in a communication path. The present invention permits the degree of multiplexing to be equal to the time slots in a communication path. It involves the use of a code coveting circuit for receiving two digital signals from two line circuits participating in one communication and for producing a third digital signal indicating the relationship between the two digital signals. A common bus distributes the third signal to the respective line circuits. A control memory stores many address pairs for the two line circuits. Control circuitry allots one time slot to the two line circuits so that information is changed periodically between the two line circuits by an address pair obtained periodically from the memory. A code inverse-converting circuit in each line receives the third digital signal and the digital signal from its own line to reproduce the digital signal of the other line.

7. 发明专利

JPH0964760A RADIO TRANSMITTER 失效
公开(公告)号：JPH0964760A
公开(公告)日：1997-03-07
申请号：JP21445695
申请日：1995-08-23
申请人： OKI ELECTRIC IND CO LTD
发明人： NAKANISHI HIDEKAZU , SHIMIZU HIROSHI , ONODERA TETSUO
IPC分类号： H03K7/00 , H04B1/04 , H04B7/01
摘要： PROBLEM TO BE SOLVED: To prevent input of a noise signal to an analog modulation input terminal in the case of a digital mode in the radio transmitter having an analog mode for analog modulation and digital mode for digital modulation. SOLUTION: The transmitter is provided with a VCO 1 being a 1st modulation means applying analog angular modulation and with an orthogonal modulator 7 being a 2nd modulation means applying digital modulation. The radio transmitter selecting either of the modulation means is provided with a pass band changeover circuit 10 used to select a signal pass band to an input of the VCO 1 being the 1st modulation means, and when the 1st modulation means is selected, a broad band LPF1 is selected to pass the modulation signal and a narrow band LPF2 is selected to eliminate a noise signal when the 2nd modulation means is selected.

8. 发明专利

JPH08148918A MOBILE OBJECT RADIO EQUIPMENT 失效
公开(公告)号：JPH08148918A
公开(公告)日：1996-06-07
申请号：JP29140494
申请日：1994-11-25
申请人： OKI ELECTRIC IND CO LTD
发明人： OKA SHINJI , NAKANISHI HIDEKAZU , ONODERA TETSUO , SHIMIZU HIROSHI
IPC分类号： H01Q21/28 , H01Q1/24 , H01Q1/27 , H01Q9/32 , H04B1/38 , H04B1/3822
摘要： PURPOSE: To perform the impedance matching of an L element for which the impedance matching is not preferentially performed by a matching circuit. CONSTITUTION: This equipment is provided with a reactance element 16 for performing the impedance matching in cooperation with the matching circuit 14 so as to perform the impedance matching of the L element 15a and a switching means 17 for turning the reactance element 16 and the L element 15a to a connected state at the time of expanding the L element 15a and turning the reactance element 16 and the L element 15a to a non-connected state at the time of housing the L element 15a. Thus, the impedance matching is made possible even for the element for which the impedance matching is not preferentially performed by the matching circuit 14.

9. 发明专利

JPH0369455B2 失效
公开(公告)号：JPH0369455B2
公开(公告)日：1991-11-01
申请号：JP8539585
申请日：1985-04-23
申请人： OKI ELECTRIC IND CO LTD
发明人： NAKAMURA SEIZO , SHIMIZU HIROSHI
IPC分类号： H04Q1/30 , H04B7/24 , H04B7/26 , H04W4/04 , H04W74/04 , H04W74/06 , H04W84/02 , H04W84/12 , H04W88/02

10. 发明专利

JPH01161928A RADIO COMMUNICATION SYSTEM 失效
公开(公告)号：JPH01161928A
公开(公告)日：1989-06-26
申请号：JP31851787
申请日：1987-12-18
申请人： OKI ELECTRIC IND CO LTD
发明人： SHIMIZU HIROSHI
IPC分类号： H04W76/02 , H04B7/26 , H04W4/22 , H04W4/90 , H04W84/10
摘要： PURPOSE:To prevent unpleasant squelch noise caused in a master station from reaching a talker of the master station by allowing a slave station to interrupt a transmission radio wave in a short time every prescribed time based on a reference of a control signal in common to the master station and the slave station and allowing the master station to interrupt a demodulation signal output synchronously therewith. CONSTITUTION:A master station sends a control signal to set a channel to a slave station and a slave station discriminates a received signal. When a call to its own station is recognized, a ratio wave is sent to set a channel to attain the communication. In this case, the slave station generates a timing of a prescribed period started by the control signal to stop the transmission radio wave in a short time t1 for each prescribed time T based on the timing. Other slave stations stop send an interruption radio wave to the master station by utilizing the time t1 based on the timing. On the other hand, the master station generates a timing of a prescribed period started by the control signal sent to the slave station, the output of demodulation signal is interrupted before and after the interruption of the radio wave sent from the slave station in a short time t2(

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式