Patents by Inventor Tadashi Takahashi

Tadashi Takahashi 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).

  • Patent number: 5829232
    Abstract: A device for detecting shortage of cigarette packs in a carton has a pair of first proximity sensors capable of individually detecting the cigarette packs at the opposite ends of the carton in an inspecting position, among other cigarette packs in the carton, and a plurality of second proximity sensors capable of individually detecting the remaining cigarette packs in the carton in the inspecting position, the interval between each two adjacent second proximity sensors being longer than the width of each cigarette pack.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: November 3, 1998
    Assignee: Tokyo Automatic Machinery Works, Ltd.
    Inventor: Tadashi Takahashi
  • Patent number: 5777750
    Abstract: Image data is separated into two colors to obtain two-color image data to form a two-color image. The two-color image data is reversed to obtain reversed two-color image data, which is output to an image forming device which forms an image of two colors.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: July 7, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Takiyama, Ryosuke Miyamoto, Hideaki Shimizu, Hiroyuki Yaguchi, Tadashi Takahashi
  • Patent number: 5768117
    Abstract: The invention relates to a power supply system having plural converters connected in parallel. The current of each of the plural converters is detected and each of the converters is controlled so as to match each of the converters to a maximum current value from among the detected current values. In the parallel converters, when one or more converter fails, having an output current of zero, the remaining converters are each partially charged equally to maintain the load current. Since a common bus is arranged between plural converters and plural loads, it is possible to carry out a redundant operation having a high reliability. Since a stable output can be obtained without being affected by the failed converter, a power supply system having the redundancy and the high reliability can be attained.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: June 16, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Takahashi, Kenichi Onda, Akihiko Kanouda, Masayoshi Sato, Hideaki Horie, Katsunori Hayashi
  • Patent number: 5693719
    Abstract: An ethylene polymer which is useful for molding inflation film having a particularly excellent moldability is provided.The ethylene polymer is obtainable by the first and second steps and satisfying the following conditions (a) to (d):(a) the polymer produced in the first polymerization step having an weight average molecular weight (Mw,.sub.1) in the range of 6.times.10.sup.5 to 4.times.10.sup.6 ;(b) the ratio (Mw,.sub.2 /Mw,.sub.1) of the weight average molecular weight of the polymer produced in the first polymerization step (Mw,.sub.1) and the weight average molecular weight of the polymer produced in the second polymerization step (Mw,.sub.2) being in the range of 0.7 to 1.4;(c) the molecular weight in which the integration fraction from the low molecular weight is equal to 1/2 of the weight fraction (W.sub.2) of the polymer produced in the second polymerization step being in the range of 5.times.10.sup.3 to 3.times.10.sup.4 ; and(d) the weight fraction (W.sub.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: December 2, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yukitaka Goto, Nobuaki Sakurai, Tadashi Takahashi, Katsumi Hirakawa, Yoichi Maeda, Yoshihiko Sasaki, Satoshi Nishimura, Masataka Souda
  • Patent number: 5666454
    Abstract: A single-mode optical fiber preform is produced by a process where a porous glass body of a core rod for a single-mode optical fiber is dehydrated and made into a glass to prepare a core rod for the optical fiber, clad layers are deposited on the circumference of the core rod for the optical fiber so as to give an outer diameter of a desired value, and then these are dehydrated and made into glass. At this time, the diameter of a part corresponding to the core rod for the optical fiber in the optical fiber obtained by drawing the preform for optical fiber is controlled to 1.9 times or more the mode field diameter, which is a diameter that allows light having a wavelength of 1.55 .mu.m to pass therethrough. As a result, a preform for a single-mode optical fiber with which an optical fiber little influenced by defects can be obtained can be produced.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: September 9, 1997
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Jun Terada, Hideaki Chiba, Mituhiro Kawasaki, Tadashi Takahashi
  • Patent number: 5650862
    Abstract: An image signal processing apparatus includes an input unit for inputting an image signal for each of at least one input line, and a conversion unit for converting the input image signal for each input line into parallel converted image signals for a plurality of output lines and for outputting the converted image signals. A processing unit is then provided for performing image processing for each of the converted image signals for the plurality of output lines.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: July 22, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideaki Shimizu, Masahiro Funada, Ryosuke Miyamoto, Hiroyuki Ichikawa, Masanori Sakai, Hiroyuki Yaguchi, Yasuhiro Takiyama, Tadashi Takahashi
  • Patent number: 5642269
    Abstract: A circuit construction comprising a diode and a capacitor is connected to a secondary coil of a thin transformer such as a wire-type transformer. An excitation energy is discharged during a reset time of the transformer, and this excitation energy is accumulated in the capacitor, thereby output voltage is obtained through the capacitor. A direct current output voltages having two outputs is obtained through one transformer. A small volume and a light weight of the transformer, so that a compact and thin power supply apparatus can be obtained. Since a winding ratio of the transformer can be made small, a copper loss of the transformer can be reduced. It is unnecessary to select a higher switching frequency and a manufacturing cost of the power supply apparatus can be reduced.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: June 24, 1997
    Assignees: Hitachi, Ltd., Hitachi Mizusawa Electronics Co., Ltd.
    Inventors: Akihiko Kanouda, Tadashi Takahashi, Kazuhiro Takizawa, Tetsuya Obara, Makoto Kawamura, Masami Joraku, Yoshio Miyamoto
  • Patent number: 5638264
    Abstract: A parallelized power supply system including a plurality of switching power supplies each having a circuit for limiting rush current generated when a main switch is turned on. This system can be installed in an apparatus which requires the functions such as power uninterrupted operation and live wire insertion/dismount. Each switching power supply has another power supply for driving the rush current limiter circuit and a relay circuit for supplying relay driving current and making a connection of relay contacts after a predetermined time lapse after the operation start of the switching power supply. An a.c. power is supplied via the relay contacts to each switching power supply. The relay driving time set in the rush current limiter circuit is different for each switching power supply.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: June 10, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Katsunori Hayashi, Akihiko Kanouda, Tadashi Takahashi, Hideaki Horie, Kenichi Onda, Yasuo Abe, Masayoshi Sato
  • Patent number: 5624761
    Abstract: A fire-protection and safety composite glass panel includes a fireproof glass plate and a film of fluorocarbon resin of a chain molecular structure type. The film is bonded onto one of opposite side surfaces of the fireproof glass plate by the thermo-compression bonding. The fluorocarbon resin is a copolymer of at least three kinds of monomers. It may be arranged that another film of the fluorocarbon resin is further bonded onto the other side surface of the fireproof glass plate by the thermo-compression bonding. Another glass panel may be arranged that a plurality of fireproof glass plates are attached with a film of the foregoing fluorocarbon resin interposed between adjacent glass plates through the thermo-compression bonding. Those glass panels can be used as glass plates in fire-protective windows and doors.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: April 29, 1997
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Akihiko Sakamoto, Tadashi Takahashi, Masayuki Ninomiya
  • Patent number: 5610449
    Abstract: A compact, thin-type, noise-tolerant and highly reliable electric power unit includes an input portion through which a predetermined voltage is applied, a plurality of power circuits for generating a plurality of different voltages from the predetermined voltage applied to said input portion, an output portion for outputting the plurality of different voltages generated in the plurality of power circuits, a control unit having a function to stabilize the plurality of different output voltages, and an insulated substrate which supports the input portion, the plurality of power circuits, the output portion and the control unit, and further has a printed wiring pattern for electrically coupling the constituent components of the electric power unit.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: March 11, 1997
    Assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd.
    Inventors: Tadashi Takahashi, Akihiko Kanouda, Kazuhiro Takizawa, Tetsunosuke Nakamura, Masami Joraku
  • Patent number: 5591832
    Abstract: A benzylated lignocellulosic substance obtained through benzylation, wherein 46 to less than 97% of lignin-carbohydrate complex (LCC) contained in a wood raw material from which the substance is formed remains.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: January 7, 1997
    Assignee: Japan Chemical Engineering & Machinery Co., Ltd.
    Inventors: Tetsuo Koshijima, Nobuo Shiraishi, Tadashi Takahashi, Toshiharu Hiraoka, Masami Ueda
  • Patent number: 5581377
    Abstract: High density portions of images are preferentially expressed when a plurality of images constructed by multivalue image data are synthesized. A plurality of different images are synthesized, wherein overlapped multivalue image data of pixels among multivalue image data constructing the images are compared and the multivalue image data of which one of the images should be preferentially used is determined in accordance with the comparison result.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: December 3, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideaki Shimizu, Hiroyuki Yaguchi, Yasuhiro Takiyama, Tadashi Takahashi
  • Patent number: 5563196
    Abstract: A wet frictional material having a high heat resistance, excellent durability and superior initial conformability. The wet frictional material contains a fiber base material, a filler, a frictional adjustment agent and a thermosetting synthetic resin. The thermosetting synthetic resin comprises a silicone resin represented by the following average formula. The silicone resin contains a trifunctional unit (RSiO.sub.3/2) (where R represents a substituted or unsubstituted monovalent hydrocarbon group) in an amount of from 40 to 100 mol % of units constituting the silicone resin:(R.sup.1).sub.a (OR.sup.2).sub.b SiO.sub.(4-a-b)/2where R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group, and R.sup.2 represents a hydrogen atom or an organic group having from 1 to 10 carbon atoms, and 0.2.ltoreq.a.ltoreq.1.8 and 0<b.ltoreq.1.0).
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: October 8, 1996
    Assignees: NSK-Warner Kabushiki Kaisha, Shin-Etsu Chemical Co., Ltd.
    Inventors: Shun Kitahara, Fumimasa Muramatsu, Shigeki Umezawa, Mitsuhiro Takarada, Tadashi Takahashi
  • Patent number: 5561366
    Abstract: The object of the present invention is to provide a small precise insulating type current sensor system.Sensing portion is composed of a magnetoresistance element, a bias conductor, and a current conductor, all of which are arranged on an insulating substrate. Resistance change of the magnetoresistance element is taken into an amplifier, and an output of the amplifier flows as a bias current to the bias conductor. When a current flows in the current conductor, the current causes a magnetic field and the resistance of the magnetoresistance element must be changed. However a feedback of the resistance change by the amplifier changes the bias current and controls the bias current for keeping the magnetic field of the magnetoresistance element at a constant. Accordingly, the insulation type current sensing with a wide range and preferable preciseness without being affected with a hysteresis of the magnetoresistance element and Barkhausen noise became possible.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: October 1, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Takahashi, Syooichi Kawamata, Shigeki Morinaga
  • Patent number: 5559682
    Abstract: A diode, a condenser and a switching element are connected to a primary winding of a flat type transformer such as a wire type transformer. A citation energy discharged during an off-condition of the switching element, namely a reset period of the transformer, is accumulated in the condenser. An output voltage is obtained from the condenser. Two system direct current voltage output can be obtained from one transformer. Since the two system direct current voltage output can be obtained from the transformer having a pair of a primary winding and a secondary winding, the volume and the weight of the transformer can be reduced and the compact and the slim of the machine apparatus being mounted can be contributed. Making the small winding ratio of the transformer, the copper loss of the transformer can be reduced. By using MOS synchronous rectification, the loss in the circuit can be reduced. It is unnecessary to select highly the switching frequency.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: September 24, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kanouda, Tadashi Takahashi, Hideaki Horie, Kenichi Onda, Syuya Hagiwara
  • Patent number: 5548069
    Abstract: A benzylated lignocellulosic substance obtained through benzylation, wherein 46 to less than 97% of lignin-carbohydrate complex (LCC) contained in a wood raw material from which the substance is formed remains.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: August 20, 1996
    Assignee: Japan Chemical Engineering & Machinery Co., Ltd.
    Inventors: Tetsuo Koshijima, Nobuo Shiraishi, Tadashi Takahashi, Toshiharu Hiraoka, Masami Ueda
  • Patent number: 5502430
    Abstract: A flat transformer has a coil body. The coil body is formed by winding plural insulated conductive wires. Each of the plural insulated conductive wires has a conductor having a circular shaped cross-section, and an outer peripheral portion of the conductor is coated by an insulating coating. A part of plural insulated conductive wires is used to form a primary winding and the remainder of the plural insulated conductive wires is used to form a secondary winding. A flat transformer may also have plural coil bodies. The plural coil bodies may be wound at plural stages. A part of the plural coil bodies is may be used to form a primary winding and the remainder of plural coil bodies may be used to form a secondary winding. The flat transformer can operate stably at a high frequency with a small loss.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: March 26, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Takahashi, Kenichi Onda, Akihiko Kanouda, Hideaki Horie, Syuya Hagiwara, Noriyuki Uchiyama, Sadamu Saito
  • Patent number: 5488022
    Abstract: A catalyst component for olefin polymerization which comprises an intimate mixture of: Component (A1) which is a solid component for Ziegler catalysts comprising titanium, magnesium and a halogen as essential components in a particulate form; and Component (A2) which is a compound selected from the group consisting of inorganic oxides, inorganic carbonates, inorganic sulfates and physical or chemical mixtures thereof in a particulate form; wherein Component (A2) is employed in a weight ratio to Component (A1) from 0.001 to 0.5 and has an average particle diameter smaller than that of Component (A1). The catalyst component may be of a structure such that the particulate inorganic material, Component (A2), adhere to or cover particles of a solid component of a Ziegler catalyst, whereby fluidity of the Ziegler catalyst component is improved.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: January 30, 1996
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tadashi Takahashi, Takashi Fujita, Kazuo Nakamura, Seiichi Tsukamoto
  • Patent number: 5488509
    Abstract: A light source apparatus for an endoscope having a light source for emitting a bundle of illuminating light rays which are to be supplied to a light guide of the endoscope. The apparatus includes at least a pair of light-blocking plates disposed in the bundle of illuminating light rays to face each other across the optical axis of the ray bundle, and a device for supporting the light-blocking plates such that the plates are rotatable about an axis extending therebetween at right angles to the optical axis. At least one of the light-blocking plates has such a cross-sectional configuration as viewed in the optical axis direction that the light-blocking plate is bent at an angle to the axis of rotation near the center of the illuminating optical path.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: January 30, 1996
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Tadashi Takahashi, Tetsuya Utsui, Rensuke Adachi, Mitsuru Iida, Katsuhiko Furuya, Junji Usami, Ryoji Honda
  • Patent number: 5474962
    Abstract: The present invention provides a powder catalyst composition for producing by gas-phase polymerization olefin polymers having excellent polymer qualities and good particle properties in a high yield.The powder catalyst composition comprises fine particles of the following Component (B) coated with the following Component (A), and is characterized in that the ratio of the Component (A) to the Component (B) based on percent by weight ranges from 5:50 to 95:50: Component (A): an inorganic compound in the form of fine particles having an average particle diameter of 0,003-1 .mu.m and mainly comprising an inorganic oxide, and Component (B): a solution or dispersion in a hydrocarbon of the following Sub-components (i) and (ii): Sub-component (i): a compound of a transition metal belonging to the IVB group of the Periodic Table, and Sub-component (ii): an alumoxane, a Lewis acid, or an ionic compound which can convert the Sub-component (i) upon reaction therewith into a cation.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: December 12, 1995
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Tadashi Takahashi, Kazuhiro Yamamoto, Katsumi Hirakawa