Patents by Inventor Hiroyuki Uematsu
Hiroyuki Uematsu 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: 20070047128Abstract: A data erasing device that erases data recorded on a magnetic disk, by a magnetic field generated in a horizontal direction by magnets, in order to prevent leakage of the data recorded on the magnetic disk of a magnetic disk device to be abandoned. The data erasing device includes a main body case having a path on which a tray is reciprocated, a demagnetizing circuit having plural permanent magnets adjacently disposed along the path in mutually adsorbing polarities, and a tray for accommodating the magnetic recording medium, and capable of reciprocating on the path. This tray includes a first accommodation groove and a second accommodation groove for accommodating the magnetic disk device. The first accommodation groove and the second accommodation groove cross each other to form an angle of 45 degrees or 90 degrees.Type: ApplicationFiled: December 20, 2005Publication date: March 1, 2007Applicant: FUJITSU LIMITEDInventors: Yoshinori Kadowaki, Hisato Suzuki, Hiroyuki Uematsu, Hiroshi Hasegawa
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Patent number: 7084976Abstract: To measure the concentration of an optically active substance in a solution without contacting the solution, the concentration measuring apparatus of the present invention includes: a light source for outputting linearly polarized light; a light intensity detecting element disposed opposite the light source with a sample placed therebetween; an optically active liquid crystal element placed between the light source and the light intensity detection circuit; a control circuit which controls the voltage to be applied to the optically active liquid crystal element so that an output value from the light intensity detecting element will in effect take an extreme value; and a concentration computing circuit for computing the concentration of an optically active substance in the sample, based on an output from the control circuit.Type: GrantFiled: September 28, 2001Date of Patent: August 1, 2006Assignee: Citizen Watch Co., Ltd.Inventors: Shigeru Morokawa, Takakazu Yano, Kenji Matsumoto, Hiroyuki Uematsu
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Publication number: 20060146435Abstract: A data erasing device erasing data from a magnetic disk using horizontal-direction and vertical-direction magnetic fields of magnets consists of a main body case having a path connected to an opening formed on one side surface, a first magnetic field generating source having three permanent magnets adjacently disposed on one surface of the path in mutually adsorbing polarities, a second magnetic field generating source having three permanent magnets on the other side of the first magnetic field generating source via the path, and a tray that accommodates a magnetic recording medium and reciprocates within the path. Only one permanent magnet at one end of the second magnetic field generating source has a polarity of the same direction as that of the opposite permanent magnet. Each of the rest two permanent magnets has a polarity in a direction different from that of the opposite permanent magnet.Type: ApplicationFiled: May 13, 2005Publication date: July 6, 2006Applicant: FUJITSU LIMITEDInventors: Hiroshi Hasegawa, Hisato Suzuki, Hiroyuki Uematsu
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Patent number: 7027249Abstract: The invention enables a magnetic disk drive to be inserted and removed against an attraction force exerted by a magnetic force that is strong enough to erase data on a magnetic disk enclosed within a metal case. A converting mechanism comprising a ballscrew and a ballscrew nut bracket is provided that converts rotational motion of a handle into translational motion of an HDD holder; by rotating the handle, the HDD holder with the hard disk drive mounted thereon is moved in the inserting and removing directions by overcoming the attraction force being exerted by the magnetic field generated by means of a permanent magnet. An electric motor may be used to generate the rotational force.Type: GrantFiled: February 19, 2004Date of Patent: April 11, 2006Assignee: Fujitsu LimitedInventors: Hiroshi Hasegawa, Hisato Suzuki, Kazutoshi Suzuki, Hiroyuki Uematsu, Takahiro Ono
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Patent number: 6872251Abstract: A method for manufacturing single crystal ceramic powder is provided. The method includes a powder supply step for supplying powder consisting essentially of ceramic ingredients to a heat treatment area with a carrier gas, a heat treatment step for heating the powder supplied to the heat treatment area at temperatures required for single-crystallization of the powder to form a product, and a cooling step for cooling the product obtained in the heat treatment step to form single crystal ceramic powder. The method provides single crystal ceramic powder consisting of particles with a very small particle size and a sphericity being 0.9 or higher.Type: GrantFiled: May 29, 2002Date of Patent: March 29, 2005Assignee: TDK CorporationInventors: Minoru Takaya, Yoshiaki Akachi, Hiroyuki Uematsu, Hisashi Kobuke
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Publication number: 20050056347Abstract: A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reducing action starting temperature for the powdered magnetic metal oxide and above a melting point of the magnetic metal in the powder. The powdered magnetic metal oxide is subject to a reducing process, and then magnetic metal particles, the resultant reduced product, is melted to form a melt. The melt is re-crystallized in a succeeding cooling step, to obtain single crystal magnetic metal power in substantially spherical form.Type: ApplicationFiled: September 22, 2004Publication date: March 17, 2005Inventors: Minoru Takaya, Yoshiaki Akachi, Hisashi Kobuke, Hiroyuki Uematsu
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Publication number: 20050041319Abstract: The invention enables a magnetic disk drive to be inserted and removed against an attraction force exerted by a magnetic force that is strong enough to erase data on a magnetic disk enclosed within a metal case. A converting mechanism comprising a ballscrew and a ballscrew nut bracket is provided that converts rotational motion of a handle into translational motion of an HDD holder; by rotating the handle, the HDD holder with the hard disk drive mounted thereon is moved in the inserting and removing directions by overcoming the attraction force being exerted by the magnetic field generated by means of a permanent magnet. An electric motor may be used to generate the rotational force.Type: ApplicationFiled: February 19, 2004Publication date: February 24, 2005Applicant: FUJITSU LIMITEDInventors: Hiroshi Hasegawa, Hisato Suzuki, Kazutoshi Suzuki, Hiroyuki Uematsu, Takahiro Ono
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Patent number: 6827758Abstract: A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reducing action starting temperature for the powdered magnetic metal oxide and above a melting point of the magnetic metal in the powder. The powdered magnetic metal oxide is subject to a reducing process, and then magnetic metal particles, the resultant reduced product, is melted to form a melt. The melt is re-crystallized in a succeeding cooling step, to obtain single crystal magnetic metal power in substantially spherical form.Type: GrantFiled: May 29, 2002Date of Patent: December 7, 2004Assignee: TDK CorporationInventors: Minoru Takaya, Yoshiaki Akachi, Hisashi Kobuke, Hiroyuki Uematsu
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Publication number: 20040051989Abstract: In a portable data erasing device, to prevent data leaks from magnetic disk devices to be disposed, data is erased by a simple operation. The data erasing device using a magnetic field generated by permanent magnets to erase data comprises a sliding tray, a main body and a swinging tray. The sliding tray is movable into and out from the main body, two permanent magnets, adjacently arranged so that the north and south poles thereof have mutually attracting polarities, are attached to the front end of the sliding tray. One end of the swinging tray is fixed to the upper surface of the main body by a shaft, so that a magnetic disk device can be mounted and swung on top of the main body. While the sliding tray is extracted stepwise from the main body, the magnetic disk device can be swung, and data on the magnetic disks erased.Type: ApplicationFiled: September 8, 2003Publication date: March 18, 2004Applicant: FUJITSU LIMITEDInventors: Hiroshi Hasegawa, Hisato Suzuki, Hiroyuki Uematsu
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Publication number: 20040012783Abstract: To measure the concentration of an optically active substance in a solution without contacting the solution, the concentration measuring apparatus of the present invention comprises: a light source for outputting linearly polarized light; a light intensity detecting element disposed opposite the light source with a sample placed therebetween; an optically active liquid crystal element placed between the light source and the light intensity detection circuit; a control circuit which controls the voltage to be applied to the optically active liquid crystal element so that an output value from the light intensity detecting element will in effect take an extreme value; and a concentration computing circuit for computing the concentration of an optically active substance in the sample, based on an output from the control circuit.Type: ApplicationFiled: May 8, 2003Publication date: January 22, 2004Inventors: Shigeru Morokawa, Takakazu Yano, Kenji Matsumoto, Hiroyuki Uematsu
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Publication number: 20020197461Abstract: A method for manufacturing single crystal ceramic powder is provided. The method includes a powder supply step for supplying powder consisting essentially of ceramic ingredients to a heat treatment area with a carrier gas, a heat treatment step for heating the powder supplied to the heat treatment area at temperatures required for single-crystallization of the powder to form a product, and a cooling step for cooling the product obtained in the heat treatment step to form single crystal ceramic powder. The method provides single crystal ceramic powder consisting of particles with a very small particle size and a sphericity being 0.9 or higher.Type: ApplicationFiled: May 29, 2002Publication date: December 26, 2002Inventors: Minoru Takaya, Yoshiaki Akachi, Hiroyuki Uematsu, Hisashi Kobuke
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Publication number: 20020189401Abstract: A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reducing action starting temperature for the powdered magnetic metal oxide and above a melting point of the magnetic metal in the powder. The powdered magnetic metal oxide is subject to a reducing process, and then magnetic metal particles, the resultant reduced product, is melted to form a melt. The melt is re-crystallized in a succeeding cooling step, to obtain single crystal magnetic metal power in substantially spherical form.Type: ApplicationFiled: May 29, 2002Publication date: December 19, 2002Inventors: Minoru Takaya, Yoshiaki Akachi, Hisashi Kobuke, Hiroyuki Uematsu
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Patent number: 4646158Abstract: A liquid crystal television receiver has a first housing containing a television receiving circuit, a mirror mounted on an upper portion thereof, and a battery for driving the television receiving circuit, a second housing containing a liquid crystal display panel, and a third housing containing a light emitting element. The first, second and third housings are pivotally connected with each other at rear portions thereof, respectively.Type: GrantFiled: October 3, 1985Date of Patent: February 24, 1987Assignee: Citizen Watch Co., Ltd.Inventors: Hideshi Ohno, Akira Tsuzuki, Toshiaki Oguchi, Shigeru Futami, Masaru Yoshida, Satoshi Kimura, Hiroyuki Uematsu, Kouichi Nakajima, Katuo Matsuyama, Hiroya Sakamoto, Yasuhiko Takayama, Osamu Matsumura, Toshio Sakaguchi
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Patent number: 4261048Abstract: An analog quartz timepiece having a manually operated external control member, and a correction signal generation circuit controlled by the external control member to generate low speed and high speed correction signals when the external control member is actuated for a short period of time and for a predetermined time interval, respectively, by which a stepping motor is driven at a selected speed to perform time correction. The timepiece also includes a click mechanism operative to shift an hours hand step-wise from any optional position without affecting a minutes hand and a seconds hand. The timepiece further includes a seconds zero-reset mechanism operative to reset the seconds hand to zero.Type: GrantFiled: June 8, 1979Date of Patent: April 7, 1981Assignee: Citizen Watch Company LimitedInventors: Jinro Motoki, Singo Ichikawa, Kenzi Miyasaka, Hiroyuki Uematsu, Mitsuhiro Murata, Hideyuki Kawashima, Yuri Inoue, Masae Ohkubo, Mituo Oooka
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Patent number: 4173863Abstract: An analog quartz timepiece having a manually operated external control member, and a correction signal generation circuit controlled by the external control member to generate low speed and high speed correction signals when the external control member is actuated for a short period of time and for a predetermined time interval, respectively, by which a stepping motor is driven at a selected speed to perform time correction. The timepiece alo includes a click mechanism operative to shift an hours hand step-wise from any optional position without affecting a minutes hand and a seconds hand. The timepiece further includes a seconds zero-reset mechanism operative to reset the seconds hand to zero.Type: GrantFiled: December 20, 1976Date of Patent: November 13, 1979Assignee: Citizen Watch Company LimitedInventors: Jinro Motoki, Singo Ichikawa, Kenzi Miyasaka, Hiroyuki Uematsu, Mitsuhiro Murata, Hideyuki Kawashima, Yuri Inoue, Masae Ohkubo, Mituo Oooka
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Patent number: 4087957Abstract: A movement construction for a small size analog quartz timepiece having a battery, a quartz crystal oscillator, an integrated circuit chip, an electro-mechanical transducer including a driving coil, stators and a rotor, and a wheel train driven by the electro-mechanical transducer to actuate a time-indicating mechanism. In one preferred embodiment, the driving coil, stators and battery are arranged in a predetermined order along the longitudinal axis of the movement construction and the integrated circuit chip is disposed to be in vertical alignment with the stators. In another preferred embodiment, the driving coil, stators and battery are arranged in spaces different from each other in a horizontal plane.Type: GrantFiled: December 20, 1976Date of Patent: May 9, 1978Assignee: Citizen Watch Company LimitedInventors: Kenzi Miyasaka, Mitsuhiro Murata, Hiroyuki Uematsu