Patents by Inventor Takashi Niwa

Takashi Niwa 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).

  • Publication number: 20010011704
    Abstract: Realized are a near-field optical probe capable of illuminating or/and detecting near-field light great in intensity and acquiring an optical image great in S/N ratio, and a manufacturing method and near-field optical apparatus. Accordingly, a near-field optical probe comprises a cantilever in a cantilever form, a base for supporting the cantilever, a tip in a weight form formed on the cantilever, a microscopic aperture formed in an end of the tip, and a shade film formed on a surface of the cantilever opposite to the base and on area other than the microscopic aperture of the tip. The tip and the cantilever are formed of a transparent material high in transmissivity relative to a wavelength of light to be generated and/or detected by the microscopic aperture, and the tip is structurally filled with the transparent material.
    Type: Application
    Filed: December 19, 2000
    Publication date: August 9, 2001
    Inventors: Takashi Niwa, Kenji Kato, Nobuyuki Kasama, Manabu Oumi, Yasuyuki Mitsuoka, Susumu Ichihara
  • Patent number: 6165336
    Abstract: A gas sensor including a gas detection element and a gas selective permeation element covering at least part of the gas detection element. The gas sensor is arranged so that gases containing a gas to be detected is brought in contact with the gas detection element via the gas selective permeation element.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: December 26, 2000
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Masao Maki, Takashi Niwa
  • Patent number: 5489808
    Abstract: An electric circuit substrate apparatus having a micro-processor for a control of a device is comprised of a substrate, an electric circuit arranged on the substrate and including a rectifier, an electrolysis condenser, a detecting device for detecting the voltage of a current outputted from the electrolysis condenser and the micro-processor which is set to stop the control of the device upon receipt of a signal from the detecting device, and an enclosing device for immersing therein the substrate and the electric circuit, except for a portion of electrolysis condenser, in order that the immersed elements are interrupted from the ambient air.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: February 6, 1996
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Takashi Niwa, Kenichi Kaneko, Osamu Matsubara, Katsuhiko Yamamoto
  • Patent number: 5488207
    Abstract: A key switch which could, for example, be used to switch a power supply for a machine tool on and off, has a locking mechanism on a rotating element of a key disengages the locking mechanism on the rotating element. The key also engages the guide on the rotating element, thereby initiating the rotation of that element and activating the switching element. If an object other than the key is inserted, the lock on the rotating element will not be released, and the rotating element will be prevented from moving, so that the switching element cannot be activated. Furthermore in another embodiment, a machine stop detection signal is fed to an internal solenoid which prevents removal of the key until the machine stops completely.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: January 30, 1996
    Inventors: Takashi Niwa, Kenji Shinohara, Makito Morii
  • Patent number: 5364283
    Abstract: A connecting device is comprised of a first housing having therein a pair of parallely spaced first passages each of which has a proximal end and a distal end, a male terminal accommodated in each of the first passages and having a proximal end to which a first wire is connected and a distal end, a second housing having therein a pair of parallely spaced second passages each of which has a proximal end and a distal end fitted into the distal end of the corresponding first passage, a female terminal accommodated in each of the second passages, having a proximal end to which a second wire is connected and a distal end engaged with the distal end of the corresponding male terminal, and an amount of viscous oily substance positioned in the neighbourhood of a portion at which the distal end of the male terminal and the distal end of the female terminal are in engagement with each other in such a manner of an establishment of conductivity therebetween.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: November 15, 1994
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kiyokazu Katoh, Kenichi Kaneko, Osamu Matsubara, Takashi Niwa
  • Patent number: 5165530
    Abstract: A light emitting type push button switch having an indication unit including an operation block containing an indicator and a switch unit having a microswitch turned on or off by the pushing of the operation block through a plunger axially movably held in the case of the indication unit, the indication unit and switch unit which can be easily engaged with each other or disengaged from each other.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: November 24, 1992
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Kenji Shinohara, Takashi Niwa
  • Patent number: 5122626
    Abstract: In a push-button switch in which a switch mechanism switched over on the basis of push-button depression is supported between a pair of split-type switch bases so as to be switchably operated, a falling-off prevention engage portion is formed at an end of a lever pivotal axle of a inclination lever provided for the switch mechanism, so as to be engageable with a pivotal hole formed in an opposing side wall of the switch base for prevention of falling-off of the inclination lever from the switch base.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: June 16, 1992
    Assignee: Omron Tateishi Electronics Co.
    Inventors: Kenji Shinohara, Takashi Niwa, Norio Iwakiri
  • Patent number: 5104838
    Abstract: Disclosed is a titanium-containing solid catalyst component which is a contact reaction product of:(i) a magnesium halide such as MgCl.sub.2,(ii) a titanium compound represented by the formula:Ti(OR.sup.1).sub.a X.sub.4-awherein a is a number of 0.ltoreq.a.ltoreq.4, R.sup.1 represents a hydrocarbon residue having 1 to 20 carbon atoms, and X represents a halogen atom, such as Ti(O--nBu).sub.4, and(iii) a coordination titanium compound represented by the formula:R.sup.2.sub.m R.sup.3.sub.n TiX.sub.4-m-nwherein R.sup.2 represents a cyclopentadienyl group or a substituted cyclopentadienyl group, R.sup.3 represents a hydrogen atom, a hydroxyl group, a hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an amino group or a substituted amino group, X represents a halogen atom, and m is a number of 1.ltoreq.m.ltoreq.4 and n is a number of 0.ltoreq.n.ltoreq.3, with the proviso that the condition of 1.ltoreq.m+n.ltoreq.4 is satisfied, such as Cp.sub.2 TiCl.sub.2, i.e.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: April 14, 1992
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Takashi Fujita, Toshihiko Sugano, Takashi Niwa
  • Patent number: 5091617
    Abstract: A high-frequency heating apparatus comprises an inverter including a semiconductor switch and a resonance capacitor, a boosting transformer for a supplying high-voltage power and heater to a magnetron an inductance device inserted in the heater circuit of the magnetron, and an inverter control unit for controlling the semiconductor switch. The inverter control unit is controlled by a start control at the start time of the inverter so that the conduction time of the semiconductor switch becomes shorter than that under a normal operating condition and the non-conduction time thereof becomes longer than that under a normal operating condition and so that the switching period of the semiconductor switch becomes substantially an integral multiple of a resonance period of the resonance circuit formed by the resonance capacitor, whereby the operating frequency of the inverter at the time of starting thereof becomes substantially equal to its normal operating frequency.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: February 25, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naoyoshi Maehara, Takahiro Matsumoto, Kazuho Sakamoto, Daisuke Bessyo, Takashi Niwa, Shigeru Kusunoki, Takao Shitaya
  • Patent number: 5072085
    Abstract: Herein disclosed is an illuminated push-button switch structure in which, when the push button is pushed, the push-button guide member united to the button is depressed while being supported to slide by the switch base. Then, the switch lever of the switch mechanism associated with the push-button guide member is abruptly turned back with a predetermined depression stroke to afford a switching feel. This turn prevents further movement of the push button in a predetermined depression direction in order to eliminate any undesired vibration of the push button. Even if the push button is obliquely pushed, it is always prevented from being inclined to provide the stable switching operation at all times.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: December 10, 1991
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Kenji Shinohara, Takashi Niwa
  • Patent number: 5017747
    Abstract: A microswitch in which a good snap action feeling is obtained and an operating stroke is large is provided. Included in the microswitch is a swingable lever which is pushed by a pressing projection of a push button swingably pivotally supported. One end of the lever is pivotally supported and the other end is coupled with one end of a movable member having a movable contact. The movable member is biased by a spring in one direction.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: May 21, 1991
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Toyohiro Nagahara, Takashi Niwa, Takezo Sano, Isao Kato
  • Patent number: 4999762
    Abstract: A high voltage power source device which comprises an electric power source; a low voltage circuit constituted by an inverter circuit including a semiconductor switching element and a capacitor for converting an electric power from the electric power source into a high frequency electric power; a magnetron; a high voltage transformer for converting the high frequency electric power into a high voltage and supplying the high voltage to the magnetron; and a printed circuit board having an electric wiring system formed thereon for connection with and support thereon of the inverter circuit and a high voltage circuit for the voltage boosted by the high voltage transformer. The printed circuit board has separate areas defined therein, and the low and high voltage circuits are formed respectively on the separate areas of the printed circuit board.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: March 12, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuho Sakamoto, Takashi Niwa, Haruo Suenaga, Takahiro Matsumoto
  • Patent number: 4990730
    Abstract: Herein disclosed is an illuminated push-button switch structure in which, when the push button is pushed, the push-button guide member united to the button is depressed while being supported to slide by the switch base. Then, the switch lever of the switch mechanism associated with the push-buton guide member is abruptly turned back with a predetermined depression stroke to afford a switching feel. This turn prevents further movement of the push button in a predetermined depression direction in order to eliminate any undesired vibration of the push button. Even if the push button is obliquely pushed, it is always prevented from being inclined to provide the stable switching operation at all times.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: February 5, 1991
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Kenji Shinohara, Takashi Niwa
  • Patent number: 4968860
    Abstract: A light emitting type push button switch having an indication unit including an operation block containing an indicator and a switch unit having a microswitch turned on or off by the pushing of the operation block through a plunger axially movably held in the case of the indication unit, the indication unit and switch unit which can be easily engaged with each other or disengaged from each other.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: November 6, 1990
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Kenji Shinohara, Takashi Niwa
  • Patent number: 4967051
    Abstract: A high-frequency heating apparatus comprises a semiconductor power converter which is supplied with electric power from a commercial power supply, a radio wave radiation section which is energized by the semiconductor power converter, a control section which controls the operation of a semiconductor element of the semiconductor power converter, and a start control section which controls the operation of the control section at the start time of the high-frequency heating apparatus. The start control section controls the operation of the control section so that the radio wave output power from the radio wave radiation section at the start time of the high-frequency heating apparatus becomes greater than that in the steady operation state thereof, whereby optimization of the performance and price of the heating apparatus can be realized.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: October 30, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naoyoshi Maehara, Haruo Suenaga, Kazuho Sakamoto, Takashi Niwa, Kimiaki Yamaguchi, Takahiro Matsumoto
  • Patent number: 4933523
    Abstract: A push-button switch including a switch base which is formed into two divisions each for mounting a switch mechanism thereon, the terminals of one circuit provided within the switch mechanism being molded in insertion in the respective division switch base, whereby the switch base is made smaller in size and simplified in assembly of the push-button switch.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: June 12, 1990
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Sueaki Honda, Mitsuji Hayashi, Takashi Niwa, Akihiko Hayakawa, Hideyuki Bingo
  • Patent number: 4910368
    Abstract: The push-button switch according to the present invention comprises a switch base, a plunger movable along a sliding portion thereof, an alternate cam pivotally provided with said plunger and guides for said alternate cam integrally formed with said sliding portion of said plunger. Therefore, the guides for the alternate cam are positioned with high accuracy with respect to the sliding portion achieving secured movement of the alternate cam.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: March 20, 1990
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Sueaki Honda, Mitsuji Hayashi, Takashi Niwa, Akihiko Hayakawa, Hideyuki Bingo
  • Patent number: 4908485
    Abstract: A switch in which a switch unit is constituted by situating the free end of a first movable member disposed with a contact between stationary contacts opposing to each other along the vertical direction, while engaging the other end of the movable member to a fixed portion, pivoting one end of a second movable member to the free end of the first movable member while engaging a spring to the other end of the s econd movable member, thereby biasing the contact of the first movable member to one of the stationary contacts, and setting the other end of the second movable member to a switch operation portion, as well as a switch wherein a housing, which enhouses a push button unit containing an illumination unit, a socket unit to be connected to the illumination unit and a plunger to be connected to the push button switch, contains to secure the switch mechanism at the lower opening thereof and the lower end of the plunger is disposed to the switch operation portion.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: March 13, 1990
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Sueaki Honda, Mitsuji Hayashi, Yasuhiro Kiyono, Takashi Niwa, Tomohiko Hayakawa
  • Patent number: 4904832
    Abstract: A microswitch in which a good snap action feeling is obtained and an operating stroke is enhanced is provided. A compession spring is interposed between a movable member and a swingable lever which are respectively pivotaly supported at close positions. The swingable lever is operated by a push button which is vertically slidable. Further, restricting plates to restrict the motion in the width direction of the movable member are attached to the push button. A positioning member to hold the swingably lever to the position which faces the push button when the microswitch is assembled is also provided.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: February 27, 1990
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Toyohiro Nagahara, Takashi Niwa, Takezo Sano, Isao Kato
  • Patent number: 4900989
    Abstract: A magnetron feeding apparatus includes an inverter circuit for converting DC power into high-frequency power; a high-tension transformer for converting the high-frequency power into high-tension power to be supplied to the magnetron; an output voltage detector for detecting the output voltage of the high-tension transformer; an input current detector for detecting the input current into the inverter circuit; a power controller for controlling the operation of the inverter circuit in response to the output voltage detected by the output voltage detector and the input current detected by the input current detector.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: February 13, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Haruo Suenaga, Naoyoshi Maehara, Kazuho Sakamoto, Takahiro Matsumoto, Takashi Niwa, Daisuke Bessyo