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1. 发明专利

JPS63308809A LIGHT COAXIAL CABLE AND ITS MANUFACTURE 失效
公开(公告)号：JPS63308809A
公开(公告)日：1988-12-16
申请号：JP14437787
申请日：1987-06-10
申请人： NIPPON TELEGRAPH & TELEPHONE , HITACHI CABLE
发明人： SAKIDA EIICHI , SEKI JUNICHI , IWAKI GENZO , KIYOFUJI MASAHIRO , KAIZU RYOSUKE , KIKUCHI HITOSHI
IPC分类号： H01B13/016 , H01B5/02 , H01B11/18 , H01B13/00
摘要： PURPOSE:To obtain a light coaxial cable excellent in electric characteristic and mechanical characteristic by constituting an outside conductor out of a pipe clad with Ag layer, through a Cu layer, at the inner face of a Al tube. CONSTITUTION:An insulator 2 and an external conductor 3 which is clad with a Cu layer 5 and an Ag layer 4 at the inside face of an Al tube 6 is provided round an internal conductor 1. For departing material of the external conductor 3, the inner layer 21 is Ag, the intermediate layer 22 is Cu and the outer layer 23 is Al and the layers 21, 23 and a plug 24 are brazed with Ag so as to prevent a pressure medium from flowing into a bonded interface at the time of extrusion processing. A mandrel 34 is supported by a compound billet 31 through a holder 35 and shifted to the die 36 side with the extrusion of the compound billet 31 and the interface between each layer of the compound billet is bonded, thus a tube is formed. By this method, the extrusion processing can be performed stably with small pressure medium 33 and a light coaxial cable excellent in electric and mechanic characteristics can be obtained.

2. 发明专利

JPS63183717A MANUFACTURE OF INNER FACE SILVER CLAD ALUMINUM PIPE 失效
公开(公告)号：JPS63183717A
公开(公告)日：1988-07-29
申请号：JP1548587
申请日：1987-01-26
申请人： NIPPON TELEGRAPH & TELEPHONE , HITACHI CABLE
发明人： SAKIDA EIICHI , SEKI JUNICHI , KIYOFUJI MASAHIRO , KAIZU RYOSUKE , KIKUCHI HITOSHI
IPC分类号： B21C23/22 , B21C23/00
摘要： PURPOSE:To form the clad pipe of good accuracy even if the inner face silver layer is thin by performing the pipe forming of the compound billet consisting of a silver pipe and aluminum alloy pipe with performing the interface joining of the inner layer and outer layer by a hydrostatic extrusion method. CONSTITUTION:The compound billet 31 consisting of a silver pipe 21 as the inner layer, an aluminum alloy pipe 22 as the outer layer and a plug 23 is formed. A pipe making is performed by fitting this compound billet 31 to a hydrostatic extrusion device and with performing the interface joining of the silver pipe 21 of the inner layer and the aluminum alloy pipe 22 of the outer layer via a pressure medium 33 and die 36. A stabilized manufacture of the inner face silver clad aluminum alloy pipe can thus be performed by holding the dimensional accuracy well even in the case of the thickness of the inner face silver clad layer being extremely thin line

3. 发明专利

JPH01175114A LIGHT WEIGHT COAXIAL CABLE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH01175114A
公开(公告)日：1989-07-11
申请号：JP33458687
申请日：1987-12-28
申请人： NIPPON TELEGRAPH & TELEPHONE , HITACHI CABLE
发明人： SAKIDA EIICHI , SEKI JUNICHI , IWAKI GENZO , KIYOFUJI MASAHIRO , KAIZU RYOSUKE , KIKUCHI HITOSHI
IPC分类号： H01B11/18 , H01B13/00
摘要： PURPOSE:To improve solderability and reliability of a light coaxial cable by forming a composite billet by arranging silver in the internal layer, aluminum in the intermediate layer and metal with good solderability in the external layer, and by forming a tube with this composite billet as the outer conductor by hydrostatic pressure extrusion and the like, while making the surface junction of each layer. CONSTITUTION:An internal layer 4 of an outer conductor 3 is made of silver. An intermediate layer 5 is made of aluminum, and an outer layer 6 is made of good solderable metal to improve soldering. Copper is mainly used as a good solderable metal. In the manufacture of three layer clad tubes using silver, aluminum and good solderable metal, a composite billet, in which silver for the internal layer 4, aluminum for the intermediate layer 5, and good solderable metal for external layer 6 are arranged, is used, and this composite billet is formed in the shape of a tube by the hydrostatic pressure extrusion method, the lubrication extrusion method, and the like, whereby interface junction level and dimension accuracy can be improved.

4. 发明专利

JP2002245880A WIND NOISE PREVENTING INSULATOR 失效
公开(公告)号：JP2002245880A
公开(公告)日：2002-08-30
申请号：JP2001042240
申请日：2001-02-19
申请人： HITACHI CABLE
发明人： SHIMADA NORIYUKI , KIKUCHI HITOSHI
IPC分类号： H01B17/40 , H01B17/02 , H02G1/02 , H02G7/00 , H02G7/14
摘要： PROBLEM TO BE SOLVED: To provide a wind noise preventing insulator that is effective even for a long insulator string and easy to take computer measures for an existing facilities. SOLUTION: In the insulator 10 that has ceramic part 12 which plural ring pleats 21 are formed integrally in concentric circle form at the lower part of a disc 20 made of porcelain, dampers 23 made of insulating elastic body are provided from the bottom end of the pleat 21, that is at the lowest end, to the outer circumference.

5. 发明专利

JP2002175734A WIND NOISE PREVENTING INSULATOR 失效
公开(公告)号：JP2002175734A
公开(公告)日：2002-06-21
申请号：JP2000370380
申请日：2000-12-05
申请人： HITACHI CABLE , TOKYO ELECTRIC POWER CO
发明人： KIKUCHI HITOSHI , KUBOKAWA HIROSHI , KUMOFUJI KATSUYOSHI , NAKAMURA HIROSHI , TACHIBANA AKIRA , IKEDA KOICHI
IPC分类号： H01B17/02 , H02G7/00
摘要： PROBLEM TO BE SOLVED: To provide a wind noise preventing insulator capable of preventing wind noise generated from a large insulator string of an extra high voltage system. SOLUTION: Cavity noise is generated in a groove formed by an outermost circumferential rib of a suspension insulator 1 and a rib in a second row from an outer side and the cavity noise causes the insulator wind noise. When substantially perpendicular wind hits the insulator string where a plurality of such suspension insulators are connected, vortexes are generated at outermost circumferential ribs 2a of each suspension insulator 1, sound waves are generated when the vortexes hit ribs in second rows from outer sides, the sound waves return and hit the upstream side ribs, they become triggers for new vortex generation and form feedback mechanisms, and the so-called cavity noise is generated. To prevent generation of the feedback mechanisms, making turbulent flows in the upstream ribs 2a is effective. Namely, the wind noise can be prevented by providing uneven elastic bodies 31 and 41 in an end rim of the outermost circumferential rib 2a of an earthenware part 2 of the suspension insulator 1.

6. 发明专利

JP2002116359A COMPOSITE FIBER OPTIC OVERHEAD GROUND WIRE 失效
公开(公告)号：JP2002116359A
公开(公告)日：2002-04-19
申请号：JP2000311719
申请日：2000-10-05
申请人： HITACHI CABLE
发明人： SUMIYA KAZUHIRO , KIKUCHI HITOSHI
IPC分类号： G02B6/44 , H01B11/22
摘要： PROBLEM TO BE SOLVED: To provide a composite fiber optics overhead ground wire having a structure which stabilizes the transmission loss characteristic of the optical fiber situated at both ends of a tape fiber stored in a spacer grove and which also enables a stress relaxing effect to be imparted to the optical fiber. SOLUTION: The structure is such that a cushioning spacer is stored in a protective tube which is twined with a conductive wire on the outside, that a plurality of tape fibers are stored in a laminated state in this spacer groove, and that, by using the elasticity of this spacer, a stress relaxing effect is imparted to the optical fiber as well as restraining optical fiber behaviors inside an optical fiber unit to which various cable behaviors are imparted. In addition, this cushioning property, i.e., the buffering effect improves the buffering effect against a lateral pressure to the optical fiber stored in the spacer groove, and then the transmission loss characteristic of the optical fiber at both ends of the tape fiber can be stabilized. A desirable material of the cushioning spacer is sponge.

7. 发明专利

JP2001342751A SNOW RESISTANT FENCE 失效
公开(公告)号：JP2001342751A
公开(公告)日：2001-12-14
申请号：JP2000169065
申请日：2000-06-01
申请人： HITACHI CABLE
发明人： OTAKA KAZUYOSHI , KIKUCHI HITOSHI
IPC分类号： E04H17/02
摘要： PROBLEM TO BE SOLVED: To provide a snow resistant fence by eliminating the occurrence of deformation due to the weight of snow without taking a special step such as reinforcement to the fence in itself. SOLUTION: A heat dissipation part of a heat pipe, laid on the furring strips of wire netting, melts the fallen snow, reduces the settling force of the snow, which is applied to the furring strips, and prevents the deformation in the case of settlement of the snow to the furring strips. The heat dissipation part of the heat pipe, laid on the upper furring strips, can get ahead of others in melting the settling snow. The length of the heat dissipation part is made to range from 2 to 8 m.

8. 发明专利

JP2001243845A WIND NOISE DAMPENING INSULATOR 失效
公开(公告)号：JP2001243845A
公开(公告)日：2001-09-07
申请号：JP2000056018
申请日：2000-02-28
申请人： HITACHI CABLE
发明人： KIKUCHI HITOSHI , KUBOKAWA HIROSHI
IPC分类号： H01B17/20
摘要： PROBLEM TO BE SOLVED: To provide a wind noise dampening insulator with a wind noise dampening element having a function to dampen wind noises as well as having a function of preventing corrosion of an insulator pin. SOLUTION: A wind noise dampening insulator 10 has the wind noise dampening element 40 enclosing the insulator pin 23 of an insulator coupling part 35. Inside of the wind noise-dampening element 40, a sacrificial metal block 11 is embedded so as to contact with the insulator pin 23.

9. 发明专利

JPH104615A METHOD FOR CONNECTING JUMPER DEVICE 失效
公开(公告)号：JPH104615A
公开(公告)日：1998-01-06
申请号：JP15265396
申请日：1996-06-13
申请人： CHUGOKU ELECTRIC POWER , HITACHI CABLE
发明人： ASHIDA SHIRO , YAMAMOTO KENJI , KIKUCHI HITOSHI
IPC分类号： H02G1/02 , H02G7/20
摘要： PROBLEM TO BE SOLVED: To provide a method for connecting a jumper device capable of mechanically and electrically stable connection without being influenced by the diameter of a used aluminum pipe. SOLUTION: For a jumper device, connecting metal fittings 102 and 103 are attached to the connection ends of pipe conductors 101a and 101b. These connecting metal fittings have spigots 102a and 103a to pipe conductors, and planes to stick fast to the opposite connection pieces 103c (102c), and the fixation between both after connection of these planes is made by a puerility of bolts 105. Fastening by bolts is performed with metallic plate interposed. hereby, required mechanical strength and electrical stability can be secured, without being influenced by the diameters of pipe conductors 101a and 101b.

10. 发明专利

JPH09322368A WIND SOUND PREVENTIVE SPIRAL ROD 失效
公开(公告)号：JPH09322368A
公开(公告)日：1997-12-12
申请号：JP13327596
申请日：1996-05-28
申请人： HITACHI CABLE
发明人： SHIMADA NORIYUKI , KIKUCHI HITOSHI
IPC分类号： H02G7/14
摘要： PROBLEM TO BE SOLVED: To improve the work execution efficiency to an aerial transmission line, and lessen the manhour in work execution, and besides, to see that it is hard to separate from the aerial transmission line even if a short circuit accident, etc. occur after work execution, by annealing both ends of a wind sound preventive spiral rod by heat treatment. SOLUTION: A wind sound preventive spiral rod 1 comprises annealed rectilinear metallic wire parts 2 and 2 at both terminals and a body part 3 preformed in spiral form by a hard metallic wire. Then, since the wind sound preventive spiral rod has annealed rectilinear metallic wire parts 2 and 2 at both terminals, a worker can wind and fix the rectilinear metallic wire parts 2 and 2 at small pitches on an aerial transmission line easily at winding work execution to the aerial transmission line. Moreover, in the case that this has annealed spiral metallic wire parts at both terminals, even if heavy external force works on the aerial transmission line by the shock of thunderbolt, etc., this absorbs effectively the external force by plastic transformation, consequently this can prevent the wind sound preventive spiral rod wound around the aerial transmission line from coming off without fail.

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