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1. 发明专利

BR8304221A 未知
公开(公告)号：BR8304221A
公开(公告)日：1984-03-13
申请号：BR8304221
申请日：1983-08-05
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBUYA SEIJI , SATO TUGUO , KOMATSU WATARU , SHIMIZU TAKEO
IPC分类号： G02B6/06 , G02B5/17

2. 发明专利

CA1247900A IMAGE FIBER AND METHOD OF FABRICATING BASE MATERIAL FOR THE SAME 未知
公开(公告)号：CA1247900A
公开(公告)日：1989-01-03
申请号：CA433969
申请日：1983-08-05
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBUYA SEIJI , SATOH TUGUO , KOMATSU WATARU , SHIMIZU TAKEO
IPC分类号： G02B6/06 , G02B6/00 , B29C73/00 , B29C73/34 , B29D11/00 , C03B37/014 , C03B37/018 , G02B6/04 , G02B6/10 , G02B6/16 , G02B6/42 , G02B6/44
摘要： The invention provides an image fiber and a method for fabricating a base material therefor. By arranging optical fiber strands at random pinholes or dislocations of the core arrangement, as seen in cross section of the image fiber, do not result. This gives a marked reduction in the moire produced when the image fiber is connected to a TV camera.

3. 发明专利

JP2003137587A METHOD FOR DRAWING OPTICAL FIBER 审中-公开
公开(公告)号：JP2003137587A
公开(公告)日：2003-05-14
申请号：JP2001338234
申请日：2001-11-02
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , ITO KYOICHI
IPC分类号： G02B6/00 , C03B37/027 , C03B37/03 , C03B37/12
摘要： PROBLEM TO BE SOLVED: To optimize condition between drawing speed and twisting condition in a method of drawing an optical fiber while continuously twisting a coated optical fiber. SOLUTION: A 1st guiding roller 4 and a 2nd guiding roller 5 which regulate running positions of the coated optical fiber 1 are provided while keeping an interval to each other in a running direction Z of the coated optical fiber 1, and between the guide rollers are provided a 1st roller 2, and a 2nd roller 3 which are in contact with the coated optical fiber 1 while turning around the center axes O directing X direction, move reciprocally along X direction reversely to each other, so as to continuously twist the coated optical fiber 1. The coated optical fiber is depressed by the 2nd reciprocating roller 3 by an amount of depression d2 which is >=0.1% to =4% to =300 m/min.

4. 发明专利

JPH06115972A METHOD FOR DRAWING WIRE OF OPTICAL FIBER 失效
公开(公告)号：JPH06115972A
公开(公告)日：1994-04-26
申请号：JP26887392
申请日：1992-10-07
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , MAEDA KEIGO
IPC分类号： C03C13/04
摘要： PURPOSE:To stabilize the gas flow and obtain optical fiber with hardly any warpage by making the sealing gas flow in the direction to draw a wire of optical fiber and regulating the flow velocity at the outlet within a specific range. CONSTITUTION:An optical fiber preform 1 is placed in the interior of a wire drawing furnace 5 having a structure equipped with a heater 3 on the outside of a furnace core tube 4, then heated with the heater 3, thereby melted and drawn into a wire. Thereby, the objective optical fiber 2 is obtained. In the process, the velocity of a sealing gas flowing in the furnace core tube 4 is measured with a current meter 7 installed in the interior of an outlet part 6 of the wire drawing furnace. The resultant information is then received with a mass flow controller 8 to control the flow rate of the sealing gas (e.g. Ar gas) and the pore diameter (e.g. 8-14mmphi) at the outlet part 6 of the wire drawing furnace is changed to control the flow velocity thereof so as to provide 1.4-5.0m/sec. Thereby, a wire of the optical fiber is drawn and formed into a tape core wire to measure the connection loss. The extent of warpage is 0.67-1.75mm and the connection loss of the tape core wire is 0.05-0.11dB/km. Thereby, the objective optical fiber with hardly any warpage is obtained.

5. 发明专利

JPH05310446A 失效
公开(公告)号：JPH05310446A
公开(公告)日：1993-11-22
申请号：JP11464792
申请日：1992-05-07
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , WAKITA TORU
IPC分类号： C03C25/10 , G02B6/44 , C03C25/02
摘要： PURPOSE:To provide a method for producing a core fiber of an optical fiber capable of preventing the waste of a resin from stacking on the end face at outlet side of dice of a cross head. CONSTITUTION:Gas seal boxes 13a and 13b are provided at two stages so as to wholly cover the end face 4a at outlet side of dice of a cross head 2. An inert gas is fed from gas feed valves 14a and 14b in gas seal boxes 13a and 13b. An inert gas is fed from gas feed valves 14a and 14b in gas seal boxes 13a and 13b. In this state, a raw fiber 1 of an optical fiber is passed through a nipple 3 of the cross head 2 and a thermoplastic resin 6 fed from a flow path 5 of the resin between the nipple 3 and the dice 4 is applied to the raw fiber 1 of the optical fiber to provide the objective core fiber 7 of the optical fiber. At this time, dice outlet side of the cross head 2 is pressurized with the inert gas in the gas seal box 13a. Thereby, the waste of the resin is prevented from stacking on the end face at the outlet of dice of cross head.

6. 发明专利

JPH04310532A DRAWING OF OPTICAL FIBER 失效
公开(公告)号：JPH04310532A
公开(公告)日：1992-11-02
申请号：JP7487791
申请日：1991-04-08
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU
IPC分类号： C03B37/027 , C03B37/029 , G02B6/00
摘要： PURPOSE:To continuously produce an optical fiber having high strength in high stability while preventing the lowering of the optical fiber strength. CONSTITUTION:An optical fiber preform 7 in a furnace core tube 3 is heated and melted by a heater 2 placed at the outer circumference of a furnace core tube 3 in a furnace 1 and an optical fiber 8 is drawn from the molten part of the optical fiber preform 7. The furnace core tube 3 has a cooling chamber 9 under the heater 2. The drawing of the optical fiber 8 is carried out while cooling the cooling chamber 9 and forcedly exhausting gas from the cooling chamber 9.

7. 发明专利

JPH03291813A MANUFACTURE OF CERAMIC SUPERCONDUCTOR 失效
公开(公告)号：JPH03291813A
公开(公告)日：1991-12-24
申请号：JP9190390
申请日：1990-04-06
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KIKUCHI SUKEYUKI , TANAKA YASUZO , KOMATSU WATARU , UNO NAOKI
IPC分类号： B21C37/00 , B21C37/06 , H01B12/10 , H01B13/00
摘要： PURPOSE:To manufacture a ceramic superconductor with excellent superconductive properties and mechanical strength by carrying out heating treatment after preparing a composite material from raw materials and a metal material for reinforcement and repeating prescribed processes. CONSTITUTION:In a metal container 3 having a square cross section and hollow parts 1, 2, the hollow part 1 and the hollow part 2 are filled with raw material 4 and a reinforcing material 5, respectively, and after the open ends of the container 3 are vacuum-sealed, the container is extruded to give a sheet-like composite body 6. The sheet-like composite body 6 is a composite of a layer of the raw materials 4 and the reinforcing material 5 packed in a stabilized metal material 7. The obtained composite 6 is formed into, for example, a spiralled body 8, it is packed in a metal tube 9, and after the open end is vacuum-sealed, the tube is extruded to give a wire with a desired shape. Next, the wire is subjected to prescribed heat treatment to convert the raw material into a superconductor and a ceramic superconductive conductor is manufactured. As a result, owing to high mechanical strength of the superconductor, easy process of manufacture is achieved.

8. 发明专利

JPH03252374A BINDING METHOD FOR CERAMIC SUPERCONDUCTING MATERIAL 失效
公开(公告)号：JPH03252374A
公开(公告)日：1991-11-11
申请号：JP4906890
申请日：1990-02-28
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , SUZUKI MINORU , UNO NAOKI , SHIGA SHOJI
IPC分类号： C04B37/00 , H01B12/02 , H01B13/00 , H01R4/68
摘要： PURPOSE:To accomplish the title mutual firm binding of a pair of superconducting materials without impairing critical current density by making their ends close to each other or bringing the ends into mutual contact and by deposition, on the boundary area, of fine particles of the same composition as that of said materials produced by a vapor phase process followed by treatment under heating. CONSTITUTION:Firstly, a pair of superconducting materials is arranged with their ends made close to each other or brought into mutual contact. Second, fine particles of composition same in the metallic component as said superconductor produced by a vapor phase process are put to on-line deposition on the boundary area. Thence, the fine particles thus deposited are subjected to treatment under heating to accomplish the objective mutual binding of said pair of ceramic superconducting materials. In the present method, handling of the powdery fine particles can be omitted, and productivity can be improved by continuous hot treatment of the fine particles deposited and carrying out sintering; furthermore, since the fine particles produced by the vapor phase process are those of submicron order size with high surface activity, the particles deposited can be sintered at relatively low temperatures, also resulting in firm binding to the interfaces of said materials.

9. 发明专利

JPH027309A MANUFACTURE OF OXIDE TYPE SUPERCONDUCTIVE WIRE 失效
公开(公告)号：JPH027309A
公开(公告)日：1990-01-11
申请号：JP15650088
申请日：1988-06-24
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBATA TOSHIAKI , SEDAKA RYOJI , KOMATSU WATARU
IPC分类号： B22D23/04 , C01G1/00 , C01G29/00 , C04B35/00 , C04B35/45 , H01B12/04 , H01B13/00
摘要： PURPOSE:To manufacture high density supeconductive wire of oxide type having crystal orientativeness and having high critical current density by heating and melting a composite oxide consisting of metal elements Bi, alkali earth metal, Cu plus oxygen, placing it around a core and giving it a form, and applying a magnetic field of 500-50000Gauss. CONSTITUTION:Material powder to become oxide type superconductor consisting of Bi, alkali earth metal, Cu and oxygen is melted 1, an the composite oxide molten substance 6 in amorphous phase is put on the periphery of a core 5 and a form is given thereto. This is cooled to crystallization temp. in heating furnaces 2, 3, 4 to fabricate an oxide type superconductive wire, and a magnetic field 8 is applied to the composite oxide in the temp. range where crystal seeds grow. As magnetic field is thus applied in the process of crystallization, the oxide type superconductor molding is homogeneous and has crystal orientativeness and enhanced density. This accomplishes an oxide superconductive wire consisting of Bi, alkali earth metal, Cu, oxygen having high density and large critical current density.

10. 发明专利

JPH01320709A MANUFACTURE OF SUPERCONDUCTIVE LINEAR SUBSTANCE IN OXIDE LINE 失效
公开(公告)号：JPH01320709A
公开(公告)日：1989-12-26
申请号：JP15399788
申请日：1988-06-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SEDAKA RYOJI , KOMATSU WATARU , SHIBATA TOSHIAKI
IPC分类号： C01G3/00 , C01G1/00 , C01G15/00 , C01G29/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To obtain a superconductive linear substance in oxide line by ultrasonic-heating a linear substance in the liquid phase material of superconductor, and precipitating superconductor precursor in oxide line on the surface of a linear substance by the reaction of thermal decomposition, and then oxidizing and heating it. CONSTITUTION:An Ni base alloy line 27 is contacted with liquid phase materiel 22 which dissolved Bi1-Sr1-Ca1-Cu2 by 0.05 mole in toluene of 1l, and is heated up to 200 deg.C by a vibrator 24 through a ultrasonic generator 25 so as to precipitate the precursor of a superconductor on the surface of the line 27. The precursor is easily and efficiently held by the line 27. Next, it is entered in a furnas 16 and dried so as to vaporize H2O and CO2. Thereafter, oxidation treatment is applied in H2O=15% aqueous solution inside a vessel 17. Lastly, it is heated to 875 deg.C in a reaction furnas 18, thus a superconductive cable 28 whose surface is covered with BiSrCaCu2OX film can be obtained.

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