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1. 发明专利

JPH02260835A OPTICAL BUS 失效
公开(公告)号：JPH02260835A
公开(公告)日：1990-10-23
申请号：JP8043389
申请日：1989-03-31
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ENOMOTO TAKASHI , HATANO SATOSHI , KISHIMOTO HIDEO
IPC分类号： H04B10/29 , H04B10/07 , H04B10/27 , H04B10/278 , H04L12/40
摘要： PURPOSE:To increase the number of connection available nodes by constituting a branch coupling rate between a node and an optical bus so as to be controlled externally. CONSTITUTION:Branch coupling rate variable branching couplers 1a-1c whose branch coupling rate is controlled externally through the application of a control voltage are used and nodes 2a, 2e, 16b-16d provided with two modes, i.e., transmission mode and reception mode are used. Then branch coupling rate control means 17b-17d are used to control so that the branching coupling rate between the bus and the node in the transmission mode is larger than the branch coupling rate between the bus and the node in the reception mode. Thus, the transmission loss of the optical bus is reduced and the number of connection available nodes is increased.

2. 发明专利

JPH02206254A TIME SLOT ACQUISITION METHOD 失效
公开(公告)号：JPH02206254A
公开(公告)日：1990-08-16
申请号：JP2684889
申请日：1989-02-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKEMOTO KENJI , HATANO SATOSHI , KISHIMOTO HIDEO , SATO KAZUHIRO
IPC分类号： H04L12/42
摘要： PURPOSE:To secure equality of communication right by providing a time slot release system area so as to cause an idle time slot to be reached after one circulation without fail. CONSTITUTION:A time slot release system display area is added in an access field. When a time slot is occupied for a long period by the communication from a communication node 1 to a communication node 3, since no idle slot reaches in excess of a predetermined timer setting, a communication node 2 revises the display of the time slot release system into the sender side release type. Since the time slot revised into the sender side release type is released by the communication node 1, the arrival of an idle time slot to the communication node 2 is warranted.

3. 发明专利

JPH0227841A COMPOSITE LOCAL AREA NETWORK 失效
公开(公告)号：JPH0227841A
公开(公告)日：1990-01-30
申请号：JP17624188
申请日：1988-07-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATANO SATOSHI , ARIOKA RYOSUKE , TAKEMOTO KENJI , SASAKI ATSUSHI
IPC分类号： H04L12/46 , H04L12/28 , H04L12/42
摘要： PURPOSE:To prevent a branch network connecting to a connection node from being isolated even if the connection node is faulty by using communication nodes and a transmission medium connecting them so as to couple two branch networks. CONSTITUTION:Communication nodes 7c, 7d and transmission media 12a, 12b are added newly. When a connection node 4c of a 3rd branch network is faulty, the communication nodes 7c, 7d are operated and the 3rd branch network and the 4th branch network are connected by the transmission media 12a, 12b. Then the communication with other branch networks caused in the 3rd branch network is realized via a connection node 4d of the 4th branch network. Thus, the 3rd branch network is connected to a node 5d of a trunk network via the connection node 4d even if the connection node 4c is faulty, then the node is not isolated.

4. 发明专利

JPH01141424A OPTICAL LOOP-NETWORK SYSTEM 失效
公开(公告)号：JPH01141424A
公开(公告)日：1989-06-02
申请号：JP29893287
申请日：1987-11-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOSHIZAWA TETSUO , MATSUBARA HIROAKI , HATANO SATOSHI , TAKEMOTO KENJI , HAKAMATA YOSHIRO
IPC分类号： H04B10/27 , H04B10/03 , H04B10/032 , H04B10/035 , H04B10/038 , H04B10/07 , H04B10/275 , H04B10/29 , H04L12/42 , H04L12/437
摘要： PURPOSE:To give both functions of a by-pass and a loop back with an easy constitution in which a loss is small by providing two changeover switches to selectively adopt a first action condition to connect a pair of input terminals and a pair of output terminals in parallel and second action condition to connect them in crossing them, to respective nodes. CONSTITUTION:A light switching part is composed of two 2X2 type optical switches 8 and 8', they are connected to signal processing units 5 and 5' by transmitting paths 6', 6'', 7'. With adjoining nodes 10 and 10', to the switch 8, a living transmitting path 6 between the node 10 and it and preserved transmitting path 7''' between the node 10' and it are connected, and, to the switch 8', a living transmitting path 6''' between the node 10' and it and a preserved transmitting path 7 between the node 10 and it are connected. Consequently, an optical switching part 2 can exert both functions of the by-pass and loop back.

5. 发明专利

JPS63298312A OPTICAL FIBER CABLE AND OPTICAL FIBER CABLE LINE 失效
公开(公告)号：JPS63298312A
公开(公告)日：1988-12-06
申请号：JP13411087
申请日：1987-05-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATANO SATOSHI , NARA SHINICHI , MURATA HISASHI
IPC分类号： G02B6/38 , G02B6/28 , G02B6/44
摘要： PURPOSE:To eliminate a need of optical couplers and branching devices and to reduce the insertion loss accompanied with them by attaching a connector plug for optical coupling which is provided with a light guide sleeve essentially consisting of a transparent material and a transparent window provided to face the terminal face of the light guide sleeve. CONSTITUTION:A connector plug 25 for connection to which a centering member of an optical fiber is set is attached to one end of an optical fiber cable 18 constituted by providing a coating around the optical fiber, and a connector plug 26 for optical branching/coupling provided with a centering member of the optical fiber, a light guide sleeve 22 which is arranged to surround the optical fiber and essentially consists of the transparent material, and a transpar ent window 21 provided to face a reflection face 23 of this sleeve is attached to the other end. Since the optical coupling function and the optical branching function are given to the optical fiber connector plug, independent parts such as optical couplers and optical branching devices are unnecessary and the num ber of connection points is reduced to reduce the connection loss.

6. 发明专利

JPS62209404A MANUFACTURE OF SLOT AND OPTICAL CABLE USING SAME 失效
公开(公告)号：JPS62209404A
公开(公告)日：1987-09-14
申请号：JP4676586
申请日：1986-03-04
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUGAWARA YASUYUKI , AKIYAMA MICHIO , HATANO SATOSHI
IPC分类号： G02B6/44
摘要： PURPOSE:To measure the quantity of twisting of a slot under noncontacting state and to use for the identification of a unit by providing a colored stripe on the external surface of the slot in parallel to the axis. CONSTITUTION:The colored stripe 16 parallel to the axis is provided on the external surface of the slot. This colored stripe 16 is provided by printing or a two-layer extrusion system. One slot 10 is regarded as a unit and when a cable includes plural units, utilization for identification is made possible by making stripes 6 difference in color corresponding to the units or adding dot marks.

7. 发明专利

JPS60217312A OPTICAL CABLE TRANSMISSION LINE 失效
公开(公告)号：JPS60217312A
公开(公告)日：1985-10-30
申请号：JP7438184
申请日：1984-04-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATANO SATOSHI , TAKAHASHI MASAYUKI , KATSUYAMA YUTAKA
IPC分类号： G02B6/28 , G02B6/287 , G02B6/44
摘要： PURPOSE:To make a signal branch to other cable without cutting an optical cable by arranging in parallel and curving two optical cables, in its part to which a transparent covering has been performed, and covering them by a transparent substance for striding over its curved parts in common. CONSTITUTION:The parts which have performed transparent coverings 18, 18' to two optical cables 10, 12 are arranged in parallel and curved. Its parts are surrounded by a transparent substance, for instance, silicon oil 16 and wrapped in common by a cover 19. An optical signal of a core 17 of the cable 10 is emitted to the outside from the transparent covering 18 as indicated with an arrow, reflected by the inside surface of the cover 19, and made incident to a core 17' of the cable 12. In this way, the optical signal can be made to branch from one optical cable to the other optical cable without cutting the optical cable.

8. 发明专利

JPS60144709A PRODUCTION FOR STRENGTHENED FLAT OPTICAL CABLE 失效
公开(公告)号：JPS60144709A
公开(公告)日：1985-07-31
申请号：JP7084
申请日：1984-01-05
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： ONO TETSUHARU , YUTOU MASAO , NAKASUJI MASAAKI , HATANO SATOSHI
IPC分类号： G02B6/44
摘要： PURPOSE:To produce a strengthened flat optical cable, which has a high strength in the transverse direction, with a good productivity by holding plural optical fibers in parallel between two fiber-reinforced tapes which are formed preliminarily in the tape half-hardening state and sticking these two fiber-reinforced tapes to each other and hardening them completely. CONSTITUTION:Fiber-refinforced tapes 1 are led to preheating heaters 5 from both of the upper side and the lower side by guide rollers 4 and are superposed. Simultaneously, plural optical fibers 6 are led in parallel by arranging guides 7 and are inserted between upper and lower fiber-reinforced tapes 1. At this time, fiber-reinforced tapes 1 are preheated by preheating heaters 5 and can be welded. Fiber-reinforced tapes 1 are sent to a forming device 8 while interposing optical fibers 6 in parallel between them and are press-fitted to each other by heating. Thereafter, optical fibers and fiber-reinforced tapes 1 joined into one body are sent to a complete hardening device 9, and a strengthening plastic coating layer 11 is hardened completely to produce a strengthened flat optical cable 10, and this cable is wound up while being cooled.

9. 发明专利

JPS6024430A BOBBIN FOR CHECKING OPTICAL FIBER CORE AND CHECKING METHOD OF OPTICAL FIBER CORE 失效
公开(公告)号：JPS6024430A
公开(公告)日：1985-02-07
申请号：JP13097683
申请日：1983-07-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HATANO SATOSHI , KOKUBU TOSHINAO
IPC分类号： G01M11/00 , G01M11/02 , G01M11/08 , G02B6/00
摘要： PURPOSE:To reduce costs of core checking to a lage extent, by forming many parallel grooves and slant grooves on the outer surface of a bobbin, providing a slot in the direction of a bus line, winding the entire length of optical fiber core in the grooves, thereby realizing the state the core is made to be a cable. CONSTITUTION:Many grooves 2 are provided on the circumference of a bobbin 1. Slant grooves 3 are formed between the neighboring grooves 2. A slot 4 is formed along the entire length of the direction of the bus line of the bobbin. Optical fiber core to be checked is wound in one groove by several turns then wound in the next groove through the slant groove 3. After the entire length of the core is wound, the bobbin 1 is compressed so as to make the gap of the slot 4 zero. Then slack is yielded in the core, and the state similar to the actual state in the real optical cable is obtained. Under this state the amount of deterioration in the transmission characteristics of the core due to the slack is measured. Then the bobbin is put in a thermostatic bath, and the same measurement is performed. Since the state of the cable can be implemented, the manhours and the costs in checking and judging the optical fiber core can be reduced to a large extent.

10. 发明专利

JPS584324B2 失效
公开(公告)号：JPS584324B2
公开(公告)日：1983-01-26
申请号：JP12179480
申请日：1980-09-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MAEKAWA EIJI , MURATA HISASHI , NAGASAWA SHINJI , HATANO SATOSHI , NIHEI FUMIHIRO
IPC分类号： G02B6/04 , G02B6/44

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