Patents by Inventor Noboru Hosokawa
Noboru Hosokawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200227464Abstract: A photodetecting device includes a semiconductor substrate, a plurality of avalanche photodiodes each including a light receiving region disposed at a first principal surface side of the semiconductor substrate, the avalanche photodiodes being arranged two-dimensionally at the semiconductor substrate, and a through-electrode electrically connected to a corresponding light receiving region. The through-electrode is provided in a through-hole penetrating through the semiconductor substrate in an area where the plurality of avalanche photodiodes are arranged two-dimensionally. At the first principal surface side of the semiconductor substrate, a groove surrounding the through-hole is formed between the through-hole and the light receiving region adjacent to the through-hole.Type: ApplicationFiled: March 30, 2020Publication date: July 16, 2020Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Atsushi ISHIDA, Noboru HOSOKAWA, Terumasa NAGANO, Takashi BABA
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Patent number: 8854053Abstract: Provided is an apparatus for analyzing the state of oil-filled electrical devices. The apparatus simulates the state of an oil-filled electrical device in which copper wire wrapped in insulating paper is immersed in insulating oil. The apparatus for analyzing the state of oil-filled electrical devices includes a first paper-covered copper wire and a second paper-covered copper wire, which are adjacent to each other; a tank which holds the first and second paper-covered copper wires as well as insulating oil extracted from the oil-filled electrical device, thereby immersing the first and second paper-covered copper wires in the insulating oil; and a capacitance measurement unit which measures the capacitance between the first and second paper-covered copper wires. The first and second paper-covered copper wires includes copper wire and insulating paper wrapped therearound.Type: GrantFiled: March 31, 2010Date of Patent: October 7, 2014Assignee: Mitsubishi Electronics CorporationInventor: Noboru Hosokawa
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Patent number: 8854068Abstract: An object of the invention is to provide a diagnostic method for an oil-filled electrical device that considers a temperature distribution in the oil-filled electrical device and enables accurate diagnosis to be conducted even when the method is applied to diagnosis of an actually operating device, and further provide a method with which such diagnosis of an oil-filled electrical device can be conducted from a component analysis value of an insulating oil in the oil-filled electrical device. The invention is a diagnostic method for an oil-filled electrical device including in an insulating oil a metal part wrapped with insulating paper, and determines that a time when a surface resistivity of a maximum precipitation site where metal sulfide is most precipitated on the insulating paper reaches a preset surface resistivity management value is a time of occurrence of an abnormality.Type: GrantFiled: August 18, 2008Date of Patent: October 7, 2014Assignee: Mitsubishi Electric CorporationInventors: Eiichi Nagao, Kentaro Taninouchi, Noboru Hosokawa, Tsuyoshi Amimoto, Kozo Tachibana, Hirotaka Muto, Junji Tanimura, Satoru Toyama
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Patent number: 8728565Abstract: The present invention provides a method for inhibiting production of copper sulfide in an electrical insulating oil inside an oil-filled electrical apparatus, including adding a benzotriazole compound not having a long-chain alkyl group when the oil-filled electrical apparatus is an open-type oil-filled electrical apparatus, or adding a benzotriazole compound having a long-chain alkyl group when the oil-filled electrical apparatus is a closed-type oil-filled electrical apparatus.Type: GrantFiled: April 8, 2011Date of Patent: May 20, 2014Assignee: Mitsubishi Electric CorporationInventors: Fukutaro Kato, Eiichi Nagao, Tsuyoshi Amimoto, Yoshio Kimura, Noboru Hosokawa, Junji Tanimura, Satoru Toyama
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Patent number: 8547193Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.Type: GrantFiled: October 18, 2010Date of Patent: October 1, 2013Assignee: Mitsubishi Electric CorporationInventors: Soichiro Kainaga, Takao Tsurimoto, Takahiko Ishikura, Hirotaka Muto, Hiroki Otera, Tetsuya Matsuda, Koji Kise, Noboru Hosokawa, Kiyoyuki Ishikawa, Koji Shinya, Ryuichi Nishiura
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Publication number: 20130216698Abstract: The present invention provides a method for inhibiting production of copper sulfide in an electrical insulating oil inside an oil-filled electrical apparatus, including adding a benzotriazole compound not having a long-chain alkyl group when the oil-filled electrical apparatus is an open-type oil-filled electrical apparatus, or adding a benzotriazole compound having a long-chain alkyl group when the oil-filled electrical apparatus is a closed-type oil-filled electrical apparatus.Type: ApplicationFiled: April 8, 2011Publication date: August 22, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Fukutaro Kato, Eiichi Nagao, Tsuyoshi Amimoto, Yoshio Kimura, Noboru Hosokawa, Junji Tanimura, Satoru Toyama
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Patent number: 8456264Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.Type: GrantFiled: October 18, 2010Date of Patent: June 4, 2013Assignee: Mitsubishi Electric CorporationInventors: Soichiro Kainaga, Takao Tsurimoto, Takahiko Ishikura, Hirotaka Muto, Hiroki Otera, Tetsuya Matsuda, Koji Kise, Noboru Hosokawa, Kiyoyuki Ishikawa, Koji Shinya, Ryuichi Nishiura
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Publication number: 20130034909Abstract: Provided is a diagnosis method for an oil-filled electrical apparatus, which is for evaluating the degree of danger of copper sulfide being generated within the oil-filled electrical apparatus, comprising: a first step for detecting a specific compound contained within insulating oil inside the oil-filled electrical apparatus; a second step for evaluating the possibility of copper sulfide being generated inside the oil-filled electrical apparatus, on the basis of the result detected by the first step; and a third step for diagnosing the degree of danger of a malfunction occurring in the oil-filled electrical apparatus, on the basis of the evaluation result obtained in the second step. The specific compound contains dibenzyl disulfide and/or a reaction product of a radical resulting from dibenzyl disulfide, and di-tert-butyl-p-cresol and/or a reaction product of a radical resulting from di-tert-butyl-p-cresol, or, di-tert-butyl-phenol and/or a reaction product of a radical resulting from di-tert-butyl-phenol.Type: ApplicationFiled: May 10, 2011Publication date: February 7, 2013Applicant: Mitsubishi Electric CorporationInventors: Satoru Toyama, Junji Tanimura, Fukutaro Kato, Tsuyoshi Amimoto, Eiichi Nagao, Takeshi Kawashima, Noboru Hosokawa
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Patent number: 8305179Abstract: An oil immersed electrical apparatus such as an oil immersed transformer that can detect copper sulfide precipitated on coil insulating paper is provided. In the oil immersed transformer in which a coil with its surface covered by insulating paper is arranged in a container filled with insulating oil, a detection member is prepared by providing two electrodes on a surface of a plate-like pressboard formed of cellulose, which is a same material as that of the insulating paper, this detection member is arranged in contact with the insulating oil, and generation of copper sulfide is detected from reduction in a surface resistance between the electrodes. The temperature of the detection member is set higher than the temperature of the coil so that copper sulfide is generated thereon prior to generation of copper sulfide on a coil unit.Type: GrantFiled: September 26, 2008Date of Patent: November 6, 2012Assignee: Mitsubishi Electric CorporationInventors: Eiichi Nagao, Kentaro Taninouchi, Noboru Hosokawa, Tsuyoshi Amimoto, Kozo Tachibana, Takanori Sone, Junji Tanimura, Satoru Toyama
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Publication number: 20120197559Abstract: The present invention is a method of predicting the probability of abnormality occurrence in an oil-filled electrical device, including the steps of: measuring a residual dibenzyl disulfide concentration in an insulating oil sampled from an oil-filled electrical device in operation; determining an estimated decrease of the residual dibenzyl disulfide concentration, relative to an initial dibenzyl disulfide concentration at the start of operation of the oil-filled electrical device; calculating the initial dibenzyl disulfide concentration from the residual dibenzyl disulfide concentration and the estimated decrease; and comparing the initial dibenzyl disulfide concentration with a specific management value.Type: ApplicationFiled: December 24, 2009Publication date: August 2, 2012Applicant: Mitsubishi Electric CorporationInventors: Eiichi Nagao, Tsuyoshi Amimoto, Fukutaro Kato, Noboru Hosokawa, Kota Mizuno
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Publication number: 20120161912Abstract: In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.Type: ApplicationFiled: October 18, 2010Publication date: June 28, 2012Applicant: Mitsubishi Electric CorporationInventors: Soichiro Kainaga, Takao Tsurimoto, Takahiko Ishikura, Hirotaka Muto, Hiroki Otera, Tetsuya Matsuda, Koji Kise, Noboru Hosokawa, Kiyoyuki Ishikawa, Koji Shinya, Ryuichi Nishiura
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Publication number: 20110291674Abstract: Provided is an apparatus for analyzing the state of oil-filled electrical devices. The apparatus simulates the state of an oil-filled electrical device in which copper wire wrapped in insulating paper is immersed in insulating oil. The apparatus for analyzing the state of oil-filled electrical devices includes a first paper-covered copper wire and a second paper-covered copper wire, which are adjacent to each other; a tank which holds the first and second paper-covered copper wires as well as insulating oil extracted from the oil-filled electrical device, thereby immersing the first and second paper-covered copper wires in the insulating oil; and a capacitance measurement unit which measures the capacitance between the first and second paper-covered copper wires. The first and second paper-covered copper wires includes copper wire and insulating paper wrapped therearound.Type: ApplicationFiled: March 31, 2010Publication date: December 1, 2011Inventor: Noboru Hosokawa
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Publication number: 20110090034Abstract: An oil immersed electrical apparatus such as an oil immersed transformer that can detect copper sulfide precipitated on coil insulating paper is provided. In the oil immersed transformer in which a coil with its surface covered by insulating paper is arranged in a container filled with insulating oil, a detection member is prepared by providing two electrodes on a surface of a plate-like pressboard formed of cellulose, which is a same material as that of the insulating paper, this detection member is arranged in contact with the insulating oil, and generation of copper sulfide is detected from reduction in a surface resistance between the electrodes. The temperature of the detection member is set higher than the temperature of the coil so that copper sulfide is generated thereon prior to generation of copper sulfide on a coil unit.Type: ApplicationFiled: September 26, 2008Publication date: April 21, 2011Applicant: Mitsubishi Electric CorporationInventors: Eiichi Nagao, Kentaro Taninouchi, Noboru Hosokawa, Tsuyoshi Amimoto, Kozo Tachibana, Takanori Sone, Junji Tanimura, Satoru Toyama
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Publication number: 20110084716Abstract: An object of the invention is to provide a diagnostic method for an oil-filled electrical device that considers a temperature distribution in the oil-filled electrical device and enables accurate diagnosis to be conducted even when the method is applied to diagnosis of an actually operating device, and further provide a method with which such diagnosis of an oil-filled electrical device can be conducted from a component analysis value of an insulating oil in the oil-filled electrical device. The invention is a diagnostic method for an oil-filled electrical device including in an insulating oil a metal part wrapped with insulating paper, and determines that a time when a surface resistivity of a maximum precipitation site where metal sulfide is most precipitated on the insulating paper reaches a preset surface resistivity management value is a time of occurrence of an abnormality.Type: ApplicationFiled: August 18, 2008Publication date: April 14, 2011Applicant: Mitsubishi Electric CorporationInventors: Eiichi Nagao, Kentaro Taninouchi, Noboru Hosokawa, Tsuyoshi Amimoto, Kozo Tachibana, Hirotaka Muto, Junji Tanimura, Satoru Toyama
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Patent number: 7472410Abstract: A video transmission apparatus for connecting to a network has a peripheral block including a video processing unit for generating compressed video data of video signals and a network control unit for controlling transmission and reception of compressed video data through a transmission medium such as a network, and a central processing unit block including a storage unit for storing the compressed image data, a central processing unit for executing data processing and a central control unit for controlling each of these units in cooperation with the central processing unit, each of the units inside the peripheral block and inside the central processing unit block is successively connected in series by first and second buses, and the first and second buses are connected through a bus buffer.Type: GrantFiled: February 27, 2002Date of Patent: December 30, 2008Assignee: Hitachi Kokusai Electric Inc.Inventor: Noboru Hosokawa
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Publication number: 20020124122Abstract: A video transmission apparatus for connecting to a network has a peripheral block including a video processing unit for generating compressed video data of video signals and a network control unit for controlling transmission and reception of compressed video data through a transmission medium such as a network, and a central processing unit block including a storage unit for storing the compressed image data, a central processing unit for executing data processing and a central control unit for controlling each of these units in cooperation with the central processing unit, each of the units inside the peripheral block and inside the central processing unit block is successively connected in series by first and second buses, and the first and second buses are connected through a bus buffer.Type: ApplicationFiled: February 27, 2002Publication date: September 5, 2002Inventor: Noboru Hosokawa
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Patent number: 6351202Abstract: A stationary induction apparatus superior in insulating ability against a surge voltage includes a coil piece on a line end side surrounded by one electrostatic shield insulating layer. The coil piece and electrostatic shield insulating layer, together with another coil piece, are surrounded by another electrostatic shield insulating layer, thus forming a successively nested configuration. Each of the electrostatic shield insulating layers includes an electrical insulating layer of pressboard and first and second conductive layers respectively located on inner and outer surface sides of the electrical insulating layer, The capacitance of each of the electrostatic shield insulating layers is adjusted to control an electrical potential distribution upon application of a surge voltage.Type: GrantFiled: May 25, 2000Date of Patent: February 26, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Keiichi Ito, Kosei Tsuji, Taketoshi Hasegawa, Noboru Hosokawa, Kiyoyuki Ishikawa, Yasuo Toba, Yasuji Yoshizumi
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Patent number: 5951193Abstract: A mechanism for connecting ornamental parts of wrist watches that permit easily connecting and disconnecting ornamental parts without using any special tool and without marring the appearance of wrist watches. A stepped pin is inserted in a larger-diameter bore of a cocoon-shaped ring fitted in an end piece and a bore in a watch casing. Then, a smaller-diameter part of the stepped pin is moved into a smaller-diameter bore by pulling the watch casing and a band longitudinally. With the stepped pin thus securely held in place, the watch casing and band are firmly connected.Type: GrantFiled: February 15, 1996Date of Patent: September 14, 1999Assignee: Kabushiki Kaisha Hattori SeikoInventors: Akio Yamamoto, Taro Tanaka, Haruyuki Shimayama, Shunichi Kojima, Noboru Hosokawa