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

JPS62210770A TALKIE SERVICE SYSTEM 失效
公开(公告)号：JPS62210770A
公开(公告)日：1987-09-16
申请号：JP5251986
申请日：1986-03-12
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIBATA SHOGO , HISAMURA MAKOTO , OCHI HIDEKAZU
IPC分类号： H04M11/08 , G10K15/02 , H04H20/81 , H04M3/42 , H04M11/06
摘要： PURPOSE:To perform a talkie service utilizing a telephone line without injuring the convenience of a telephone, by supervising continuously a line by permitting a micro current by which no vacant call detection is affected in the line, to flow, on the line in the talkie service. CONSTITUTION:When control parts 7 and 14 detects the vacant state of the telephone line with the outputs of potential monitoring parts 5 and 10, a talkie sending part 6 on a talkie service station device 3 is connected to a talkie amplifier 12 in a talkie service customer station equipment 8. When an incoming from a telephone exchange 1 arrives in a talkie service serving state, the relay and the earth of a subscriber's circuit 2 are separated from the line as known well, and potentials go to the potential polarities of a line A (ground) and a line B (-48V) by input trunks not sown in figure. Changes in the potentials are monitored at the potential monitoring parts 5 and 10 respectively in the station device 3 and the customer station equipment 8, and the control parts 7 and 14 restore relays S in line switching parts 4 and 9, thereby the talkie service is interrupted.

2. 发明专利

JPS57203364A TRANSMITTING SYSTEM FOR ABNORMAL CONGESTION ANNOUNCEMENT 失效
公开(公告)号：JPS57203364A
公开(公告)日：1982-12-13
申请号：JP8818781
申请日：1981-06-10
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： FUKUSHIMA YUTAKA , HISAMURA MAKOTO , NISHIKADO IWAMASA
IPC分类号： H04M3/50 , H04M3/38 , H04Q3/00
摘要： PURPOSE:To facilitate the transmission of announcement in an abnormal congestion mode without increasing the software load, by connecting previously the output side terminal of a time division switch to a sound source terminal corresponding to a subscriber class when a call bus is disconnected. CONSTITUTION:In case an abnormal congestion occurs in such a degree that it is on a level just to limit the outgoing of the general subscribers, a changeover switch 46 is changed with an announcement device 46 connected to a sound source terminal 37 to transmit the announcement informing the outgoing limitation to a general subscriber circuit, e.g., a subscriber circuit 30 which is connected to the terminal 37. After this, an information on the outgoing limitation can be heard from the device 46 with no intervention of a software when a telephone 28 is picked up. In case the congestion increases to cause the need for the outgoing limitation of an important subscriber, a changeover switch 45 is switched to allow even the important subscriber to hear the announcement of the outgoing limitation through an announcement device 44. In these cases, a subscriber who is talking at a moment when outgoing limitation starts can complete the talking without receiving any effect.

3. 发明专利

JPS558150A DIODE MATRIX DIVISION SYSTEM 失效
公开(公告)号：JPS558150A
公开(公告)日：1980-01-21
申请号：JP8088878
申请日：1978-07-05
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： HISAMURA MAKOTO , TSUCHIE NOBUO , MUNAKATA KOUICHI , YAMAZAKI AKIO , UEHARA KAZUE
IPC分类号： H04Q3/64 , H03K17/76
摘要： PURPOSE:To limit the unavailable range of the matrix caused by the ON fault of the diode down to 1/mXn by giving the complex connection the dividing diodes in the same X and Y directions of m X n units of division matrixes. CONSTITUTION:Group dividing diodes DX11-DXrn plus DY11-DYsm are provided. In case the ON fault occurs to diodes D (1, 1) within division matrix MTX11, the selective operation is given to driving circuits Xp and Ys. As a result, only relays L (p, s) within MTX1n have operation via the loop formed through DXpn and DXsi. In this case, it is impossible to give the normal driving to relay L within the same MTX11. But the unavailable area is reduced down to 1/mXn in the whole matrix in case the ON fault occurs at D (1, 1). As a result, the entire matrix never becomes faulty to limit sufficiently the effect of the fault.

4. 发明专利

JPS5119416A 失效
公开(公告)号：JPS5119416A
公开(公告)日：1976-02-16
申请号：JP9078974
申请日：1974-08-09
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： SHIRATO TAKAO , INAMASU MITSUO , IIZUKA ICHIRO , HISAMURA MAKOTO , KAWAI HIROYUKI
IPC分类号： H04M3/48 , H04M3/00 , H04M3/42 , H04Q3/54

5. 发明专利

JPS5842314A DIGITAL-TO-ANALOG CONVERTING CIRCUIT 失效
公开(公告)号：JPS5842314A
公开(公告)日：1983-03-11
申请号：JP13946081
申请日：1981-09-04
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , HITACHI LTD , FUJITSU LTD
发明人： IKOMA YUUJI , TOKUI YOSHIMASA , NAITOU YOSHIO , HISAMURA MAKOTO , KATAKURA HITOSHI
IPC分类号： H03M1/68 , H03K13/02
摘要： PURPOSE:To attain the conversion with double precision, by D/A-converting rough information, sample-holding the result, changing over output leads, D/A- converting detailed information, and weighting this information and the information in the sample holding circuit in accordance with the number of bits. CONSTITUTION:A half of a digital amount D/A-converted is converted into analog information at a D/A converter at first, and the result is inputted to a sample holding circuit SAMH through a switching circuit CHC. After the operation of a switching relay CH, a digital information output circuit OUT outputs the rest half of the digital information. The output of the remaining half is converted at the D/A converter and inputted to an adder ADD, where the input from the sample holding circuit SAMH and said input are summed with weighting in accordance with the converted number of bits and outputted. Leads from the output circuit OUT to the D/A converter are used with time division multiplexedly, allowing to perform conversion with double precision by using less number of leads.

6. 发明专利

JPS5119413A 失效
公开(公告)号：JPS5119413A
公开(公告)日：1976-02-16
申请号：JP9078774
申请日：1974-08-09
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： NAKAMURA JUNJI , MORISHITA SHUNZO , IKEDA SABURO , HISAMURA MAKOTO , YAMAMOTO KOJI
IPC分类号： H04M3/38 , H04M3/00

7. 发明专利

JPS58108852A TERMINATING TRUNK SYSTEM 失效
公开(公告)号：JPS58108852A
公开(公告)日：1983-06-29
申请号：JP20694981
申请日：1981-12-23
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： HISAMURA MAKOTO , MIZUNO TADASHI
IPC分类号： H04M3/22 , H04M3/38 , H04M15/24
摘要： PURPOSE:To transmit information on a no-charge subscriber call easily and economically by providing a means which allows a terminating trunk ICT to discriminate between a subscriber busy state and a no-charge call by itself without depending upon a common controller marker. CONSTITUTION:If a conventional incoming no-charge telephone set FLT, etc., is connected irregularly instead of a general telepbone set TEL, a relay D does not operate. In this case, a relay M operates to stop a call. In a figure, a talking line is broken at a contact (m) to disable the call, but the relay M starts charging, performs lamp indication,and finds an irregular subscriber while holding the circuit. In inocming to the no-charge telephone set FLT, only a relay G which is not in the figure operates by the indication of the common controller. Consequently, a calling subscriber receives a bush-back signal BT and a called subscriber receives a call signal IR.

8. 发明专利

JPS5317233A DEVICE ASSIGNMENT SYSTEM 失效
公开(公告)号：JPS5317233A
公开(公告)日：1978-02-17
申请号：JP9136776
申请日：1976-08-02
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： TAKEDA YOSHIHIRO , HISAMURA MAKOTO , TAKEHARA KAZUO , SAKATA YOSHIO
IPC分类号： G06F13/14 , G06F3/00
摘要： PURPOSE:Under the series device assignment system where device assigning lead is made multiple with respect to all asigned devices, the same constitution is given to the device assigning information receiving circuit in every assigned device, so that production efficiency can be improved and connection between devices can be simplified.

9. 发明专利

JPS52101907A SHUNT TYPE CURRENT SWITCHING SCANNING METHOD 失效
公开(公告)号：JPS52101907A
公开(公告)日：1977-08-26
申请号：JP1793376
申请日：1976-02-23
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SEKI SHIGEO , HISAMURA MAKOTO , UENO TAKAO , ISHIZAWA AKIRA
IPC分类号： H04Q3/72 , H04Q3/00
摘要： PURPOSE:To distinguish originating call of a telephone and to economize the device by providing a shunt resistor in a current switching scanning circuit in an automatic telephone exchange.

10. 发明专利

JPS51117809A METHOD TO CHANGE SUBSCRIBER TELEPHONE NOS OF CONTACT PARTIES 失效
公开(公告)号：JPS51117809A
公开(公告)日：1976-10-16
申请号：JP4279675
申请日：1975-04-10
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： KIMURA NAOHIRO , OGAWA HIDEKAZU , SATOU AKIHIKO , HISAMURA MAKOTO , AIISO ATSUSHI
IPC分类号： H04M3/44 , H04M3/50
摘要： PURPOSE:Telephone subscribers themselves can reload subscriber telephone numbers of their contact parties by permitting the change of contact party subscriber telephone numbers by abbreviated dial registration operation using part of an abbreviated dialing subscriber's address as contact party number in the existing abbreviated dialing method.

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