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1. 发明专利

JPH0833196A SEMICONDUCTOR CUT-OFF DEVICE 失效
公开(公告)号：JPH0833196A
公开(公告)日：1996-02-02
申请号：JP18543094
申请日：1994-07-14
申请人： FUJI ELECTRIC CO LTD
发明人： HATAKEYAMA YOSHIFUMI
IPC分类号： H02H7/12 , H02M1/00
摘要： PURPOSE:To provide a semiconductor cut-off device where the scattering of turn-off time among a plurality of semiconductor devices which are connected to a same polarity is eliminated. CONSTITUTION:A ferromagnetic body 91 is penetrated through a gate control line 81 at the side of a GTO thyristor element 11 with a short turn-off time in GTO thyristor elements 11 and 12 which are connected together and the rising of gate current is delayed, thus preventing the turn off time of the GTO thyristor elements 11 and 12 from scattering.

2. 发明专利

JPH09269415A FLUORESCENT FIBER AND LIGHT CONVERGENT UNIT 失效
公开(公告)号：JPH09269415A
公开(公告)日：1997-10-14
申请号：JP8030896
申请日：1996-04-02
申请人： FUJITSU KASEI KK , TOKYO ELECTRIC POWER CO , FUJI ELECTRIC CO LTD
发明人： KUROSAWA KIYOSHI , TANAKA AKIRA , HATAKEYAMA YOSHIFUMI
IPC分类号： G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide a fluorescent fiber having high fluorescent conversion efficiency and excellent for heat resistance and corrosion resistance and a convergent unit incorporating it. SOLUTION: The fluorescent fiber 1 is constituted so as to contain a core 3 formed by norbornene system resin containing fluorescent coloring matter and a clad 5 provided on the outside of the core 3 and with a refractive index lower than the core 3. A protodetector 23 is connected to at least one end of such a fluorescent fiber 1 directly or indirectly, and a transparent or translucent light convergent body 41, etc., is arranged on the side of the fluorescent fiber 1, and the convergent unit is constituted so that he light fluorescent converted by the convergent body 41, etc., is led by the fluorescent fiber 1 to be fluorescent converted again.

3. 发明专利

JPH03283328A BUFFER TYPE GAS CIRCUIT BREAKER 失效
公开(公告)号：JPH03283328A
公开(公告)日：1991-12-13
申请号：JP8425390
申请日：1990-03-30
申请人： FUJI ELECTRIC CO LTD
发明人： TSUCHIKAWA MIYUKI , HATAKEYAMA YOSHIFUMI , ISOZAKI MASARU
IPC分类号： H01H33/70 , H01H33/91
摘要： PURPOSE:To increase a current capable of breaking a circuit without increasing the control force of a driving device by providing in an opening space portion and independently of a buffer chamber a gas chamber for storing high-pressure gas therein. CONSTITUTION:An insulating nozzle 16 is comprised of insulating tubes 16A, 16B and thereby a ring shaped hollow portion 17 to be embedded in the nozzle 16 is formed and the insulating tube 16B has plural gas inlet ports 18 each provided on the side of a movable contact 4 and extending from an opening 10 and plural gas discharge ports 19 each provided at the opening 10 so that the hollow portion 17 is communicated with an opening space portion 19. A larger amount of gas to be blown to an arc 15 can thus be secured. A rated interrupting current is thereby increased without increasing the control force of a driving device.

4. 发明专利

JPS63150677A ACCIDENT DETECTING METHOD FOR HIGH-VOLTAGE COMPOSITE DEVICE 失效
公开(公告)号：JPS63150677A
公开(公告)日：1988-06-23
申请号：JP29788186
申请日：1986-12-15
申请人： FUJI ELECTRIC CO LTD
发明人： KANETAKA YASUHIKO , HATAKEYAMA YOSHIFUMI
IPC分类号： G01R31/12 , H02B13/065
摘要： PURPOSE:To securely decide which of equipment and an arrester has an accident first after the end of the accident by providing a fuse element formed by charging quartz sand at the periphery of a metallic wire in series with the nonlinear resistance element of the arrester. CONSTITUTION:If the nonlinear resistance element 8d deteriorates during the use of the arrester to cause the through-breakdown or surface flashover of an element, a large current flows in from an upper flange 82 to flow the metallic wire 104 of the fuse element 10. Consequently, the metallic wire is melted and vaporized instantaneously and the quartz sand 105 around an arc is melted with arc heat to bind, thereby forming a hollow arc tunnel. If an insulation container is broken with the pressure in the insulation container before the fault current is cut off by a high-order breaker, the quartz sand is scattered to the inside of an arrester container 8a. Further, when the time until the cutoff of the fault current is short and the insulation container of the fuse element is not broken, the container is broken artificially to confirm whether or not there is the arc tunnel.

5. 发明专利

JPS6390102A DISCHARGE CONSTRUCTION OF ARRESTOR 失效
公开(公告)号：JPS6390102A
公开(公告)日：1988-04-21
申请号：JP23553686
申请日：1986-10-03
申请人： FUJI ELECTRIC CO LTD
发明人： HATAKEYAMA YOSHIFUMI , NISHIHARA ATSUSHI
IPC分类号： H01C7/12

6. 发明专利

JP2002298711A GAS CIRCUIT BREAKER 失效
公开(公告)号：JP2002298711A
公开(公告)日：2002-10-11
申请号：JP2001099533
申请日：2001-03-30
申请人： FUJI ELECTRIC CO LTD
发明人： SUGIYAMA SHUICHI , YAMATO HIROSHI , YAMAGISHI YASUHIKO , ONCHI TOSHIYUKI , KIMURA YOICHI , HATAKEYAMA YOSHIFUMI , TAKAO NOBUYUKI , ISHIHARA MASARU , FUJITA MASAHIKO
IPC分类号： H01H33/915 , H01H33/70
摘要： PROBLEM TO BE SOLVED: To improve the shielding performance of a gas circuit breaker than conventional ones by selecting molecules and atoms intruding into an arc 1. SOLUTION: This gas circuit breaker is provided with a fixed contact 2 and a movable contact 4 capable of contacting with/separating from each other in a hermetically sealed vessel filled with arc-extinguishing gas. An insulating body 13 dissolving components into molecules and atoms respectively by arc heat generated in a dissociation clearance 5 is fitted to, at least, either one of the fixed contact 2 or the movable contact 4 and the constituent elements of the insulating body 13 are set to either of carbon and hydrogen, carbon and oxygen, or carbon, hydrogen, and oxygen.

7. 发明专利

JP2002250756A METHOD OF TESTING LEADING SMALL CURRENT OF CIRCUIT BREAKER 审中-公开
公开(公告)号：JP2002250756A
公开(公告)日：2002-09-06
申请号：JP2001288271
申请日：2001-09-21
申请人： FUJI ELECTRIC CO LTD
发明人： KAI SHINICHI , HATAKEYAMA YOSHIFUMI
IPC分类号： G01R31/327 , G01R31/333
摘要： PROBLEM TO BE SOLVED: To test the leading small current of a circuit breaker without using a short-circuit generator. SOLUTION: A capacitor 5 for waveform adjustment is connected in parallel with the circuit breaker 1 to be tested, the circuit breaker 1 is made to open in a state that a DC electric charge charged into a power-supply capacitor 2 is made to flow to the circuit breaker 1 via a reactor 4.

8. 发明专利

JPH04308414A DC CIRCUIT PROTECTIVE DEVICE 失效
公开(公告)号：JPH04308414A
公开(公告)日：1992-10-30
申请号：JP20965491
申请日：1991-08-22
申请人： FUJI ELECTRIC CO LTD
发明人： HATAKEYAMA YOSHIFUMI , TOBIYAMA YOSHIHIRO
IPC分类号： H01F7/18 , H02H3/08 , H02H3/087
摘要： PURPOSE:To cut off a circuit so as to protect a contact when layer short circuit occurs by connecting a cut-off circuit composed of a switching element and overcurrent detecting resistance to a DC circuit to be protected. CONSTITUTION:A cut-off circuit 10 is constituted by connecting in series a switching element S1 with an overcurrent detecting resistance path R7. When the terminals 1 and 2 of the circuit 10 are connected to a DC circuit to be protected and a power switch S0 is closed, a DC voltage is applied across the base B of the element S1 through a bias resistance R6 and the collector C and emitter E of the element S1 are conducted with each other. When layer short circuit occurs in the DC circuit and an overcurrent flows to the resistance R7, the potential at a connecting point H abruptly rises and the base B of a transistor S2 is conducted, since an electric current is supplied to the base B. Then an electric current flows to the terminal N of a DC power source and an alarm circuit 6 outputs an alarm signal 6S and, at the same time, the potential at the output terminal G of a resistance type potential divider 11 drops and the element S1 is set in a cut-off state. Therefore, the exhaustion of a contact can be prevented by cutting off an electric current when the DC current short-circuits.

9. 发明专利

JP2001210162A METHOD FOR FORMING INSULATION FILM BY ELECTRIC DISCHARGE 失效
公开(公告)号：JP2001210162A
公开(公告)日：2001-08-03
申请号：JP2000015701
申请日：2000-01-25
申请人： SAKAI YOSUKE , FUJI ELECTRIC CO LTD
发明人： SAKAI YOSUKE , HATAKEYAMA YOSHIFUMI
IPC分类号： H01B19/00
摘要： PROBLEM TO BE SOLVED: To provide a forming method easy but not requiring expensive facilities for an insulation film which is strong and hard enough against peeling from coated objects. SOLUTION: An additive, which forms a solid insulation substance by the reaction with negative gas, is filled into the negative gas. By generating electric discharge in it to make the additive react with the negative gas the solid insulation substance is formed adhering to the surface of an object.

10. 发明专利

JP2000081351A PHOTODETECTOR 失效
公开(公告)号：JP2000081351A
公开(公告)日：2000-03-21
申请号：JP35787898
申请日：1998-12-16
申请人： TOKYO ELECTRIC POWER CO , FUJI ELECTRIC CO LTD , FUJITSU KASEI KK
发明人： KUROSAWA KIYOSHI , HATAKEYAMA YOSHIFUMI , KANEKO HIDEO , TANAKA AKIRA
IPC分类号： G01J1/02 , G01J1/58 , G02B6/02
摘要： PROBLEM TO BE SOLVED: To provide a fluorescent fiber type photodetector which can detect light generated in an enclosed container at a higher sensitivity. SOLUTION: A fluorescent fiber 1 is arranged on the periphery of a light collecting plate 21 having a reflective plate on one side thereof and along the inner wall face of an inner fixing hole. Collected light is introduced to the fluorescent fiber 1 in order to excite fluorescent substance contained in the core thereof and resultant fluorescence is transmitted in the axial direction along the core thus detecting generation of light at the axial end.

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