Patents by Inventor Kazunori Tatsuda
Kazunori Tatsuda 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: 11062871Abstract: An analog amplification vacuum tube of the present invention suppresses influences of filament vibration on amplification characteristics. The analog amplification vacuum tube of the present invention is provided with a filament, an anode, a grid and a vibration-proof part. The filament is tensioned linearly and emits thermal electrons. The anode is disposed parallel to the filament. The grid is disposed between the filament and the anode so as to face the anode. The vibration-proof part includes a thin film usable in a vacuum environment and the thin film comes into contact with part of the filament.Type: GrantFiled: January 10, 2019Date of Patent: July 13, 2021Assignees: NORITAKE CO., LIMITED, NORITAKE ITRON CORPORATIONInventors: Kazunori Tatsuda, Takehiro Nakao, Tomotaka Ezaki
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Publication number: 20200328057Abstract: An analog amplification vacuum tube of the present invention suppresses influences of filament vibration on amplification characteristics. The analog amplification vacuum tube of the present invention is provided with a filament, an anode, a grid and a vibration-proof part. The filament is tensioned linearly and emits thermalelectrons. The anode is disposed parallel to the filament. The grid is disposed between the filament and the anode so as to face the anode. The vibration-proof part includes a thin film usable in a vacuum environment and the thin film comes into contact with part of the filament.Type: ApplicationFiled: January 10, 2019Publication date: October 15, 2020Applicants: NORITAKE CO., LIMITED, NORITAKE ITRON CORPORATIONInventors: Kazunori TATSUDA, Takehiro NAKAO, Tomotaka EZAKI
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Publication number: 20170103867Abstract: A vacuum tube includes a filament and two pairs of a grid and an anode. The filament is tensioned linearly and emits thermoelectrons. Both of the anodes are formed on a same face on a planar substrate. The filament is arranged parallel to the planar substrate at a position facing both of the anodes. Each of the grids is arranged, such that the grid faces the anode of a same pair at a first predetermined distance from the anode and has a second predetermined distance from the filament, between the anode and the filament. The vacuum tube further includes an intermediate filament fixing part fixing the filament at a position corresponding to an intermediate point between the anodes of the two pairs.Type: ApplicationFiled: December 22, 2016Publication date: April 13, 2017Applicants: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITED, KORG INC.Inventors: Kazunori TATSUDA, Tadami MAEDA, Misa YAMANAKA, Fumio MIEDA
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Patent number: 9620323Abstract: A vacuum tube includes a filament and two pairs of a grid and an anode. The filament is tensioned linearly and emits thermoelectrons. Both of the anodes are formed on a same face on a planar substrate. The filament is arranged parallel to the planar substrate at a position facing both of the anodes. Each of the grids is arranged, such that the grid faces the anode of a same pair at a first predetermined distance from the anode and has a second predetermined distance from the filament, between the anode and the filament. The vacuum tube further includes an intermediate filament fixing part fixing the filament at a position corresponding to an intermediate point between the anodes of the two pairs.Type: GrantFiled: December 22, 2016Date of Patent: April 11, 2017Assignees: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITED, KORG INC.Inventors: Kazunori Tatsuda, Tadami Maeda, Misa Yamanaka, Fumio Mieda
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Patent number: 9589758Abstract: An object of the present invention is to provide a vacuum tube with a structure close to that of an inexpensive and easily available vacuum fluorescent display which easily operates as an analog amplifier. A vacuum tube subject to the present invention comprises: a filament which is tensioned linearly and emits thermoelectrons, an anode arranged parallel to the filament, and a grid arranged between the filament and the anode such that the grid faces the anode. The present invention is characterized in that a distance between the filament and the grid is between 0.2 mm and 0.6 mm, including 0.2 mm and 0.6 mm.Type: GrantFiled: January 19, 2016Date of Patent: March 7, 2017Assignees: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITEDInventors: Kazunori Tatsuda, Tadami Maeda, Misa Yamanaka
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Patent number: 9583300Abstract: The vacuum tube subject to the present invention comprises a filament and two pairs of a grid and an anode. The filament is tensioned linearly and emitting thermoelectrons. Both of the anodes are formed on the same face on a planar substrate. The filament is arranged parallel to the planar substrate at a position facing both of the anodes. Each of the grids is arranged, such that the grid faces the anode in the same pair at a first predetermined distance from the anode and has a second predetermined distance from the filament, between the anode and the filament. The vacuum tube comprises an intermediate filament fixing part fixing the filament at a position corresponding to an intermediate point between the anodes of the two pairs.Type: GrantFiled: January 19, 2016Date of Patent: February 28, 2017Assignees: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITED, KORG INC.Inventors: Kazunori Tatsuda, Tadami Maeda, Misa Yamanaka, Fumio Mieda
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Publication number: 20160211107Abstract: An object of the present invention is to provide a vacuum tube with a structure close to that of an inexpensive and easily available vacuum fluorescent display which easily operates as an analog amplifier. A vacuum tube subject to the present invention comprises: a filament which is tensioned linearly and emits thermoelectrons, an anode arranged parallel to the filament, and a grid arranged between the filament and the anode such that the grid faces the anode. The present invention is characterized in that a distance between the filament and the grid is between 0.2 mm and 0.6 mm, including 0.2 mm and 0.6 mm.Type: ApplicationFiled: January 19, 2016Publication date: July 21, 2016Applicants: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITEDInventors: Kazunori TATSUDA, Tadami MAEDA, Misa YAMANAKA
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Publication number: 20160211106Abstract: The vacuum tube subject to the present invention comprises a filament and two pairs of a grid and an anode. The filament is tensioned linearly and emitting thermoelectrons. Both of the anodes are formed on the same face on a planar substrate. The filament is arranged parallel to the planar substrate at a position facing both of the anodes. Each of the grids is arranged, such that the grid faces the anode in the same pair at a first predetermined distance from the anode and has a second predetermined distance from the filament, between the anode and the filament. The vacuum tube comprises an intermediate filament fixing part fixing the filament at a position corresponding to an intermediate point between the anodes of the two pairs.Type: ApplicationFiled: January 19, 2016Publication date: July 21, 2016Applicants: NORITAKE ITRON CORPORATION, NORITAKE CO., LIMITED, KORG INC.Inventors: Kazunori TATSUDA, Tadami MAEDA, Misa YAMANAKA, Fumio MIEDA
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Patent number: 6917157Abstract: Disclosed is an electrode for an electron source, a method for producing the same, and an electronic tube using the same which provide a decreased thickness of an electron emitting source, and an improved current distribution percentage. The electronic tube comprises a substrate, an electron emitting source area formed on the substrate, and a shield area around the electron emitting area. The shield area is formed of a material that does not produce an electron emitting source, when the electron emitting source is produced by a dry method. As a result, if a space between an electron drawing electrode and the electrode for the electron source is narrow, the percentage of anode current increases in the total current, thereby improving the current distribution percentage.Type: GrantFiled: June 7, 2002Date of Patent: July 12, 2005Assignee: Noritake Co., Ltd.Inventors: Tomotaka Ezaki, Sashiro Uemura, Junko Yotani, Hiromu Yamada, Takeshi Nagasako, Hiroyuki Kurachi, Kazunori Tatsuda, Yukiharu Seko, Tsuyoshi Maesoba
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Publication number: 20030001478Abstract: Disclosed is an electrode for an electron source, a method for producing the same, and an electronic tube using the same which provide a decreased thickness of an electron emitting source, and an improved current distribution percentage. The electronic tube comprises a substrate, an electron emitting source area formed on the substrate, and a shield area around the electron emitting area. The shield area is formed of a material that does not produce an electron emitting source, when the electron emitting source is produced by a dry method. As a result, if a space between an electron drawing electrode and the electrode for the electron source is narrow, the percentage of anode current increases in the total current, thereby improving the current distribution percentage.Type: ApplicationFiled: June 7, 2002Publication date: January 2, 2003Inventors: Tomotaka Ezaki, Sashiro Uemura, Junko Yotani, Hiromu Yamada, Takeshi Nagasako, Hiroyuki Kurachi, Kazunori Tatsuda, Yukiharu Seko, Tsuyoshi Maesoba
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Patent number: 5844358Abstract: A light emitting device is provided including a front panel on which fluorescent elements are arranged in a matrix form and a rear panel onwhich cathodes are arranged in a corresponding relation to the fluorescent elements. The cathodes emit thermoelectrons for causing the fluorescent elements to emit light, and a square frame-like spacer is provided, one opening portionof the spacer being covered with the front panel and the other opening portion thereof covered with the rear panel. A stepped portion for fitting with the spacer is formed in a position of the rear panel to be bonded with the spacer.Type: GrantFiled: January 11, 1996Date of Patent: December 1, 1998Assignee: ISE Electronics CorporationInventors: Sashiro Uemura, Yoshiyuki Nishii, Isamu Kanda, Kazunori Tatsuda, Yukiharu Seko, Hiroshi Kamogawa, Tokuhide Shimojyo, Zenichiro Hara, Nobuo Terazaki, Shunichi Futatsuishi, Kozaburo Shibayama, Shuji Iwata
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Patent number: 5406170Abstract: The present invention relates to light emitting devices which emit light upon impingement of thermoelectrons on a front panel having fluorescent elements and where an array of cathodes and electrodes are provided on a substrate within each light emitting device. Thus, in the present invention, first electrode leads having a coefficient of thermal expansion substantially equal to that of the substrate are inserted into and through the substrate, and second electrode leads having a coefficient of thermal expansion substantially equal to that of the rear panel are inserted into and through the rear panel, and the first and second electrode leads are connected such that the substrate is supported at a distance above the rear panel.Type: GrantFiled: December 8, 1993Date of Patent: April 11, 1995Assignees: Ise Electronics Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Sashiro Uemura, Yoshiyuki Nishii, Isamu Kanda, Kazunori Tatsuda, Yukiharu Seko, Hiroshi Kamogawa, Tokuhide Shimojyo, Zenichiro Hara, Nobuo Terazaki, Shunichi Futatsuishi, Kozaburo Shibayama, Shuji Iwata
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Patent number: 5304083Abstract: The present invention relates to a light emitting device which emits light upon impingement of thermoelectrons on a front panel having fluorescent elements. In each bonding surface of a spacer which is bonded to both front and rear panels, a positional deviation or displacement of the spacer with respect to the front panel, the rear panel or a shielding electrode is prevented, whereby there is obtained a light emitting device of high accuracy free of variations in luminance, and it is made possible to reduce a dead space between adjacent light emitting devices and thereby attain a display of high resolution. In order to obtain such display, the front panel and the spacer, as well as the rear panel and the spacer, are respectively bonded through premolded frit glass.Type: GrantFiled: March 12, 1992Date of Patent: April 19, 1994Assignees: Ise Electronics Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Sashiro Uemura, Yoshiyuki Nishii, Isamu Kanda, Kazunori Tatsuda, Yukiharu Seko, Hiroshi Kamogawa, Tokuhide Shimojyo, Zenichiro Hara, Nobuo Terazaki, Shunichi Futatsuishi, Kozaburo Shibayama, Shuji Iwata
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Patent number: 4972116Abstract: A light source display tube arranged in matrix form in one plane as a unit element to constitute a large screen display device, where a stray path for electrons emitted from the cathode is eliminated, and concentration of the electric field of the control grid disturbing the electron flow is prevented, thereby pseudo light emission is prevented and electrical trouble is minimized in simple fashion.Type: GrantFiled: March 3, 1989Date of Patent: November 20, 1990Assignees: ISE Electronics Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Kazunori Tatsuda, Masaaki Kobayashi, Mitsuru Masuda, Hiroshi Kamogawa, Zenichiro Hara, Nobuo Terazaki, Shunichi Futatsuishi, Norihiro Ichikawa, Shiji Iwata
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Patent number: 4970430Abstract: A fluorescent display apparatus as a constituent of picture elements of a large-screen display apparatus which is provided with control electrodes for controlling courses of thermoelectrons emitted from cathodes, thereby decreasing fluctuation in brightness of a fluorescent display cell emitting light upon being bombarded by the electrons and preventing the electrons from bombarding other than predetermined fluorescent display cell with result of no emission of false light.Type: GrantFiled: March 29, 1989Date of Patent: November 13, 1990Assignees: ISE Electronics Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Kamogawa, Kazunori Tatsuda, Zenichiro Hara, Norihiro Ichikawa, Shuji Iwata, Nobuo Terazaki
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Patent number: 4893056Abstract: Fluorescent display apparatus for use in a large-screen display comprising a display portion having fluorescent display portions arranged in a matrix and coated with fluorescent material for emitting light upon being bombarded by thermoelectrons, cathodes of the type consuming small power shaped in a linear form oriented in the direction of the row or column and disposed to oppose the display portion arranged that one cathode corresponds to two or four of the fluorescent display portions, a first control electrode in a planar form having openings made therein corresponding to the fluorescent display portions of the display portion and disposed between the display portion and the cathodes, second control electrodes disposed on the side of the cathodes opposite to the display portion, and arranged corresponding to each cathode along the length of the cathode, and third control electrodes disposed on both sides of the second control electrodes in the direction of the column, and arranged so as to correspond to eType: GrantFiled: October 12, 1988Date of Patent: January 9, 1990Assignees: Mitsubishi Denki Kabushiki Kaisha, Ise Electronics CorporationInventors: Zenichiro Hara, Masaaki Kobayashi, Kazunori Tatsuda, Nobuo Terazaki, Shuji Iwata
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Patent number: 4692663Abstract: A fluorescent display tube includes a plurality of phosphor screens formed on a front panel of an envelope to constitute a matrix, a plurality of cathode electrodes floating from the inner surface of a rear panel of the envelope and corresponding to the phosphor screens so as to constitute a matrix in the same manner as the phosphor screens, grid electrodes which are arranged between the phosphor screens and the cathode electrodes of the rows of the matrix and each of which has electron beam apertures, and stripe-like back electrodes formed on the inner surface of the rear panel so as to correspond to the columns of the matrix. A voltage applied to the cathode electrodes is higher or lower than that to the grid and back electrodes. Light emission of the phosphor screens can be arbitrarily controlled to obtain high resolution with a compact arrangement.Type: GrantFiled: June 30, 1986Date of Patent: September 8, 1987Assignee: Ise Electronics CorporationInventors: Masaaki Kobayashi, Yosiyuki Okubo, Kazunori Tatsuda