Patents by Inventor Toshinori Tatsumi
Toshinori Tatsumi 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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Patent number: 11342127Abstract: A vacuum-capacitor-type instrument voltage transformer (1) is equipped with a main capacitor (2) and an insulating tube (3) that accommodates the main capacitor (2). A voltage dividing capacitor (4) is connected to the main capacitor (2) in series. The main capacitor (2) is equipped with a plurality of vacuum capacitors (2a) to (2c) that are connected in series. A high-voltage-side electrode (6) is provided on a high-voltage side of the insulating tube (3), and a ground-side electrode (7) is provided on its low-voltage side. The high-voltage-side electrode (6) is equipped with a high-voltage shield (8). Electrostatic capacity of the vacuum capacitor (for example, the vacuum capacitor (2a)) disposed on the high-voltage side is set to be greater than electrostatic capacity of the vacuum capacitor (for example, the vacuum capacitor (2b)) disposed on the low-voltage side.Type: GrantFiled: October 16, 2018Date of Patent: May 24, 2022Assignee: MEIDENSHA CORPORATIONInventors: Osamu Takeya, Yoshiyuki Tanimizu, Toshimasa Fukai, Toshinori Tatsumi, Toru Tanimizu
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Publication number: 20200357572Abstract: A vacuum-capacitor-type instrument voltage transformer (1) is equipped with a main capacitor (2) and an insulating tube (3) that accommodates the main capacitor (2). A voltage dividing capacitor (4) is connected to the main capacitor (2) in series. The main capacitor (2) is equipped with a plurality of vacuum capacitors (2a) to (2c) that are connected in series. A high-voltage-side electrode (6) is provided on a high-voltage side of the insulating tube (3), and a ground-side electrode (7) is provided on its low-voltage side. The high-voltage-side electrode (6) is equipped with a high-voltage shield (8). Electrostatic capacity of the vacuum capacitor (for example, the vacuum capacitor (2a)) disposed on the high-voltage side is set to be greater than electrostatic capacity of the vacuum capacitor (for example, the vacuum capacitor (2b)) disposed on the low-voltage side.Type: ApplicationFiled: October 16, 2018Publication date: November 12, 2020Applicant: MEIDENSHA CORPORATIONInventors: Osamu TAKEYA, Yoshiyuki TANIMIZU, Toshimasa FUKAI, Toshinori TATSUMI, Toru TANIMIZU
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Patent number: 10607801Abstract: Emitter (3) and target (7) are arranged so as to face each other in vacuum chamber (1), and guard electrode (5) is provided at outer circumferential side of electron generating portion (31) of emitter (3). Guard electrode (5) is supported movably in directions of both ends of vacuum chamber (1) by guard electrode supporting unit (6). To perform regeneration process of guard electrode (5), guard electrode (5) is moved to opening (22) side (to separate position) by operating guard electrode supporting unit (6), and a state in which field emission of electron generating portion (31) is suppressed is set, then by applying voltage across guard electrode (5), discharge is repeated. After performing regeneration process, by operating guard electrode supporting unit (6) again, guard electrode (5) is moved to opening (21) side (to emitter position), and a state in which field emission of electron generating portion (31) is possible is set.Type: GrantFiled: March 16, 2017Date of Patent: March 31, 2020Assignee: MEIDENSHA CORPORATIONInventors: Daizo Takahashi, Toshinori Tatsumi, Michihiro Hatanaka
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Publication number: 20190341218Abstract: Emitter (3) and target (7) are arranged so as to face each other in vacuum chamber (1), and guard electrode (5) is provided at outer circumferential side of electron generating portion (31) of emitter (3). Guard electrode (5) is supported movably in directions of both ends of vacuum chamber (1) by guard electrode supporting unit (6). To perform regeneration process of guard electrode (5), guard electrode (5) is moved to opening (22) side (to separate position) by operating guard electrode supporting unit (6), and a state in which field emission of electron generating portion (31) is suppressed is set, then by applying voltage across guard electrode (5), discharge is repeated. After performing regeneration process, by operating guard electrode supporting unit (6) again, guard electrode (5) is moved to opening (21) side (to emitter position), and a state in which field emission of electron generating portion (31) is possible is set.Type: ApplicationFiled: March 16, 2017Publication date: November 7, 2019Applicant: MEIDENSHA CORPORATIONInventors: Daizo TAKAHASHI, Toshinori TATSUMI, Michihiro HATANAKA
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Patent number: 9422933Abstract: A conductive coating layer 2a, 2b is formed on at least one of an inner peripheral side and an outer peripheral side of a base body 2 of bellows 1 by diffusion-bonding. Regarding the diffusion-bonding, the flat conductive coating layer 2a, 2b is layered on at least one end surface side of the plate-shaped base body 2, and these base body 2 and conductive coating layer 2a, 2b are diffusion-bonded. After forming this diffusion-bonded multilayer member into a tubular body by a drawing process, a side wall of the tubular body is formed into a bellows shape. With these processes, it is possible to obtain the bellows that has the conductive coating layer having a more uniform thickness on the base body of the bellows and has extremely good characteristics (the mechanical characteristics and the electric characteristics).Type: GrantFiled: April 19, 2012Date of Patent: August 23, 2016Assignee: MEIDENSHA CORPORATIONInventors: Toshinori Tatsumi, Eiichi Takahashi
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Patent number: 8755166Abstract: A vacuum capacitor includes a fixed electrode, a movable electrode, a movable electrode shaft, a magnetic flux receiving unit, a magnetic flux generating unit and a capacitance control unit. The fixed electrode is formed from a plurality of electrode members in a vacuum casing. The movable electrode is formed from a plurality of electrode members arranged in gaps formed between the electrode members of the fixed electrode in the vacuum casing. The movable electrode shaft supports the movable electrode. Capacitance appearing between the movable electrode and the fixed electrode is varied by rotation of the movable electrode shaft. The magnetic flux receiving unit rotates the movable electrode shaft in the vacuum casing. The magnetic flux generating unit is located outside the vacuum casing and rotates the magnetic flux receiving unit by magnetic attraction. The capacitance control unit rotates the magnetic flux generating unit.Type: GrantFiled: November 19, 2009Date of Patent: June 17, 2014Assignee: Meidensha CorporationInventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki, Toru Tanimizu
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Patent number: 8749947Abstract: The present invention can easily adjust capacitance of a vacuum capacitor while maintaining a vacuum state in a vacuum chamber of the vacuum capacitor. A fixed electrode 4 is formed by arranging a plurality of flat electrode members 5 in layers at a certain distance in an axial direction of a vacuum chamber 1b. A movable electrode 7 is formed by arranging a plurality of flat electrode members 8 in layers at a certain distance in the axial direction of the vacuum chamber 1b and fixing the electrode members 8 to a movable electrode shaft 9. By rotation of the movable electrode shaft 9, each electrode member 8 is inserted into and extracted from a gap between the electrode members 5 of the fixed electrode 4 in noncontact with the electrode members 5 of the fixed electrode 4. A magnetic flux receiving portion 106b is fixed to a seal member 102 side of a disk member 106a that is provided at the movable electrode shaft 9.Type: GrantFiled: March 28, 2011Date of Patent: June 10, 2014Assignee: Meidensha CorporationInventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki
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Patent number: 8749946Abstract: A vacuum capacitor includes a fixed electrode, a movable electrode, a movable electrode shaft, a magnetic flux receiving unit, a magnetic flux generating unit and a capacitance control unit. A plurality of electrode members in a vacuum casing form the fixed electrode. The fixed electrode is divided into a plurality of fixed electrodes, and each fixed electrode is lead outside the vacuum casing and electrically connected to each other in series. A plurality of electrode members arranged in gaps between the electrode members of the fixed electrode form the movable electrode. Rotating the movable electrode shaft, which supports the movable electrode, varies capacitance between the movable electrode and the fixed electrode. The magnetic flux receiving unit rotates the movable electrode shaft. The magnetic flux generating unit, located outside the vacuum casing, rotates the magnetic flux receiving unit by magnetic attraction. The capacitance control unit rotates the magnetic flux generating unit.Type: GrantFiled: November 19, 2009Date of Patent: June 10, 2014Assignee: Meidensha CorporationInventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki, Toru Tanimizu
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Publication number: 20140083288Abstract: A conductive coating layer 2a, 2b is formed on at least one of an inner peripheral side and an outer peripheral side of a base body 2 of bellows 1 by diffusion-bonding. Regarding the diffusion-bonding, the flat conductive coating layer 2a, 2b is layered on at least one end surface side of the plate-shaped base body 2, and these base body 2 and conductive coating layer 2a, 2b are diffusion-bonded. After forming this diffusion-bonded multilayer member into a tubular body by a drawing process, a side wall of the tubular body is formed into a bellows shape. With these processes, it is possible to obtain the bellows that has the conductive coating layer having a more uniform thickness on the base body of the bellows and has extremely good characteristics (the mechanical characteristics and the electric characteristics).Type: ApplicationFiled: April 19, 2012Publication date: March 27, 2014Inventors: Toshinori Tatsumi, Eiichi Takahashi
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Publication number: 20130038978Abstract: The present invention can easily adjust capacitance of a vacuum capacitor while maintaining a vacuum state in a vacuum chamber of the vacuum capacitor. A fixed electrode 4 is formed by arranging a plurality of flat electrode members 5 in layers at a certain distance in an axial direction of a vacuum chamber 1b. A movable electrode 7 is formed by arranging a plurality of flat electrode members 8 in layers at a certain distance in the axial direction of the vacuum chamber 1b and fixing the electrode members 8 to a movable electrode shaft 9. By rotation of the movable electrode shaft 9, each electrode member 8 is inserted into and extracted from a gap between the electrode members 5 of the fixed electrode 4 in noncontact with the electrode members 5 of the fixed electrode 4. A magnetic flux receiving portion 106b is fixed to a seal member 102 side of a disk member 106a that is provided at the movable electrode shaft 9.Type: ApplicationFiled: March 28, 2011Publication date: February 14, 2013Inventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki
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Publication number: 20110235231Abstract: [Object] An object of the present invention is to provide a vacuum capacitor, a vacuum state of a vacuum chamber of which is maintained without bellows etc., and whose capacitance is easily adjustable, and a decrease of life of which is lessened. [Means to Solve] A fixed electrode 4 is formed by arranging a plurality of flat electrode members 5 in layers at a certain distance in an axial direction of a vacuum chamber 1b in the vacuum chamber 1b.Type: ApplicationFiled: November 19, 2009Publication date: September 29, 2011Inventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki, Toru Tanimizu
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Publication number: 20110228441Abstract: [Object] An object of the present invention is to provide a vacuum capacitor, a vacuum state of a vacuum chamber of which is maintained without bellows etc., and whose capacitance is easily adjustable, and a decrease of life of which is lessened. [Means to solve] A fixed electrode 4 is formed by arranging a plurality of flat electrode members 5 in layers at a certain distance in an axial direction of a vacuum chamber 1b in the vacuum chamber 1b.Type: ApplicationFiled: November 19, 2009Publication date: September 22, 2011Inventors: Eiichi Takahashi, Toshimasa Fukai, Toshinori Tatsumi, Yuichi Nishikiori, Kaoru Kitakizaki, Toru Tanimizu