Patents by Inventor Kazuo Ikawa
Kazuo Ikawa 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: 5285232Abstract: A red-eye phenomenon preventing device includes a light emitting part for flash photography, a light emitting part for preventing the red-eye phenomenon, a reflection shade arranged to surround the light emitting part for flash photography and the light emitting part for preventing the red-eye phenomenon, and a protector disposed in front of the light emitting part for flash photography and the light emitting part for preventing the red-eye phenomenon.Type: GrantFiled: September 22, 1992Date of Patent: February 8, 1994Assignee: Canon Kabushiki KaishaInventors: Hidenori Taniguchi, Kazuo Ikawa, Masayoshi Kiuchi, Michio Hirohata
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Patent number: 5097284Abstract: A camera comprises a first responsive circuit for initiating a red-eye phenomenon preventing illumination in response to a first stroke of operation on a shutter release button; a determining circuit for making a determination whether or not the red-eye phenomenon preventing illumination initiated by the first responsive circuit has lasted for a given period of time; and a second responsive circuit for initiating a flash photographing operation in response to a second stroke of operation on the release button and also to the determination made by the determining circuit that the red-eye phenomenon preventing illumination has lasted for the given period of time.Type: GrantFiled: October 26, 1990Date of Patent: March 17, 1992Assignee: Canon Kabushiki KaishaInventors: Hidenori Taniguchi, Kazuo Ikawa
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Patent number: 4983998Abstract: The present patent application discloses a flash device for camera, or a camera, including a light emitter for flash photography mounted about a pivot shaft on the camera body and a light condenser mounted about a pivot shaft on the photographic lens barrel which moves to vary the light distribution characteristics of the light emitter as the focal length of the photographic optical system varies, wherein when the flash device is in use, the light condenser moves as the focal length of the photographic optical system varies, thus making it possible to obtain the light distribution characteristic which is suited to the focal length of the photographic optical system, while when not in use, the light emitter and the light condenser are turned to be integrally housed in an appropriate plate of either the lens barrel or the camera body.Type: GrantFiled: December 19, 1989Date of Patent: January 8, 1991Assignee: Canon Kabushiki KaishaInventors: Michio Hirohata, Kazuo Ikawa, Kiyoshi Ikuta
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Patent number: 4942340Abstract: In the oscillating booster circuit of an electronic flash device for a camera arranged to boost the output of a DC low voltage source by a blocking oscillator circuit and to make it into a DC high voltage through a high voltage rectifier diode before a main capacitor of the flash device is charged therewith, a booster circuit operation display arrangement is operated solely by the spike voltage of the booster circuit to stably display the operating state of the booster circuit.Type: GrantFiled: December 12, 1988Date of Patent: July 17, 1990Assignee: Canon Kabushiki KaishaInventor: Kazuo Ikawa
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Patent number: 4941070Abstract: A flash device for a camera of the kind using a miniature lamp type flash tube solves all the problems resulting from the use of the straight tube type flash tube. The disclosed arrangement of the flash device not only ensures an adequate light distributing characteristic in all the vertical and lateral directions but also permits reduction in size of an electronic flash unit.Type: GrantFiled: March 30, 1989Date of Patent: July 10, 1990Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Kazuo Ikawa, Toru Shoji, Hideo Tamamura, Hiroki Nakayama, Takashi Matsushita
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Patent number: 4672273Abstract: The enclosed electronic flash device for a camera includes a booster circuit connectible to an electrical power source or battery, a high voltage rectifier diode for rectifying the output of the booster circuit, and a storage capacitor. A main power supply switch and an auxiliary power supply switch are connected in series between the negative poles of the power source and capacitor. The auxiliary power supply switch is arranged to close when the flash device is attached to the camera. A signal terminal is connected to the negative pole of the storage capacitor through other circuit elements and another signal terminal is connected to one contact of the auxiliary power supply switch, which is connected in turn to the negative pole of the storage capacitor. The auxiliary power supply switch is connected in series with the main power supply switch at a point farther from the negative terminal of the battery than the main power supply switch.Type: GrantFiled: July 27, 1984Date of Patent: June 9, 1987Assignee: Canon Kabushiki KaishaInventors: Kazuo Ikawa, Isao Watanabe
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Patent number: 4666280Abstract: A flash shot control device for a camera in which the angle of flash lighting is controlled in accordance with the output of a backlight detector. On assumption that a subject of principal photographic interest takes its place at the center of the field of view, when backlight is detected, the flash lighting is concentrated to the central portion of the field of view, thereby the shadows of the subject are lightened by the flash.Type: GrantFiled: March 25, 1986Date of Patent: May 19, 1987Assignee: Canon Kabushiki KaishaInventors: Makoto Miyawaki, Kazuo Ikawa
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Patent number: 4540059Abstract: A hydraulic servo axially biases a rack and pinion steering housing to add an additional amount of steering to the front wheels of a vehicle in response to one of (a) the amount of steering wheel rotation, (b) the rate of steering wheel rotation, or (c) the vehicle yaw rate, to compensate for the effect of cross winds or the like.Type: GrantFiled: May 19, 1983Date of Patent: September 10, 1985Assignee: Nissan Motor Co., Ltd.Inventors: Yasuji Shibahata, Namio Irie, Kazuo Ikawa, Yohsuke Akatsu
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Patent number: 4534435Abstract: A hydraulic or pneumatic servo arrangement which is controlled in response to the rotation of the steering wheel is connected to member of a rear suspension in a manner to apply a bias thereto which distorts an elastomeric insulator or insulators forming part of suspension so as to steer the wheel or wheels associated with the member in the same direction as the front wheels are steered.Type: GrantFiled: June 6, 1983Date of Patent: August 13, 1985Assignee: Nissan Motor Co., Ltd.Inventors: Yasuji Shibahata, Namio Irie, Kazuo Ikawa, Yohsuke Akatsu
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Patent number: 4527654Abstract: A delay which may take the form of a hydraulic flow restriction (either fixed or variable with a given parameter such as vehicle speed) or a suitable electronic delay circuit, is interposed between a device which outputs a signal indicative of the front wheels being steered and a device which is operatively connected with the rear wheels and which varies the orientation of the rear wheels in a manner to "steer" same in response to the signal to control the yawing of the vehicle.Type: GrantFiled: March 18, 1983Date of Patent: July 9, 1985Assignee: Nissan Motor Co., Ltd.Inventors: Yasuji Shibahata, Namio Irie, Kazuo Ikawa, Yohsuke Akatsu
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Patent number: 4519627Abstract: To control the compliance steering of the rear wheels of a vehicle during cornering or the like, a link member of the rear suspension arrangements supporting each of the rear road wheels, is provided with a servo mechansim which can vary the length thereof in a manner which tends to steer the rear wheel associated therewith in the same direction as the front wheels are turned to produce the cornering.Type: GrantFiled: June 6, 1983Date of Patent: May 28, 1985Assignee: Nissan Motor Co., Ltd.Inventors: Yasuji Shibahata, Namio Irie, Kazuo Ikawa, Yohsuke Akatsu
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Patent number: 4440254Abstract: The pressure outputs of a power steering control valve are fed either to hydraulic cylinders (or servos) or to chambered elastomeric insulator units to, in the case of the rear wheels, produce a bias which opposes a side force produced during cornering to prevent the rear wheels from undergoing "compliance steering", while in the case of front wheels, induce same to turn through an angle slightly greater than intended by the driver to either prevent compliance steering or increase same to improve vehicle handling when cornering respectively .Type: GrantFiled: November 9, 1981Date of Patent: April 3, 1984Assignee: Nissan Motor Co., Ltd.Inventors: Yasuji Shibahata, Namio Irie, Kazuo Ikawa, Yosuke Akatsu
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Patent number: 4404618Abstract: A flash device of the type in which the flash tube is coated with a trigger electrode and is positioned in contact with the back metal constituting part of the reflector so that when the trigger signal is applied directly to the back metal, the flash tube is triggered. In this type of flash device the back metal constituting part of the reflector is configured to a round shape. Because of the necessity of insuring good light distribution it is generally made of bright alloy aluminum. This not only makes it difficult to finely adjust the position of the flash tube relative to the back metal and electrically connect the trigger wire lead with the back metal, but also gives rise to a problem of electrically insulating the back metal from the other metallic parts since a very high voltage for triggering is applied to the back metal.Type: GrantFiled: September 3, 1981Date of Patent: September 13, 1983Assignee: Canon Kabushiki KaishaInventors: Tateo Yamada, Toshiharu Mamiya, Kazuo Ikawa
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Patent number: 4357087Abstract: In the disclosed flash camera, a flash unit is movable between protruding and stowed positions, and a sensor senses whether a capacitor that flashes the unit is adequately charged. A switch and a control circuit enable the flash only when the unit is in the protruding position and the sensor simultaneously senses an adequate charge.Type: GrantFiled: March 12, 1981Date of Patent: November 2, 1982Assignee: Canon Kabushiki KaishaInventors: Kazuo Ikawa, Michio Hirohata, Mutsuhide Matsuda, Yukio Mashimo
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Patent number: 4288722Abstract: A control circuit for an electronic flash device is disclosed. The control circuit is connected to a commutating capacitor and includes a coil connected in parallel to the capacitor and switching means connected in the discharge path of the commutating capacitor to discharge the charge stored on the commutating capacitor after a switching device for stopping flash emission has changed from the conducting state to the non-conducting state.Type: GrantFiled: August 28, 1979Date of Patent: September 8, 1981Assignee: Canon Kabushiki KaishaInventor: Kazuo Ikawa
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Patent number: 4256994Abstract: A computer type electronic flash device is disclosed. The flash device has an auxiliary capacitor for producing a bias voltage which is to be superimposed on the charged voltage across the main capacitor upon triggering of the flash tube, and an impedance circuit provided in the discharge path of the auxiliary capacitor to produce an actuating voltage for the light measuring circuit when the auxiliary capacitor produces the above-described bias voltage.Type: GrantFiled: September 21, 1979Date of Patent: March 17, 1981Assignee: Canon Kabushiki KaishaInventor: Kazuo Ikawa
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Patent number: 4246213Abstract: A cover member for a safety air-cushion device is made up of a bag-shaped outer laminate of high density polyurethane foam, and a bag-shaped inner laminate of low density polyurethane foam which is integral with the outer laminate, the inner laminate being made by pouring the fluidized foamable material into a mold after solidification of the other fluidized foamable material having been poured into the mold for the formation of the outer laminate.Type: GrantFiled: August 2, 1978Date of Patent: January 20, 1981Assignee: Nissan Motor Company, LimitedInventors: Yukio Takamatsu, Takashi Wakabayashi, Hideyo Noda, Kiyoshi Ichikawa, Tsuneteru Kamegai, Kazuo Ikawa
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Patent number: 4241369Abstract: An electrical power supply for an electronic flash unit with a main capacitor charged by a current flowing from a direct-current source through an electrical power source switch to the main capacitor is disclosed. The electrical power source has a semi-conductor switch connected in the charge path to the main capacitor and a detector, arranged to detect whether or not an aerial discharge is produced between the contacts of said switch upon opening of the electrical power source switch, and, upon occurrence of a discharge, to produce a signal. The semi-conductor switch is opened in response to the signal to stop charging of the main capacitor immediately.Type: GrantFiled: June 12, 1979Date of Patent: December 23, 1980Assignee: Canon Kabushiki KaishaInventor: Kazuo Ikawa
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Patent number: 4153355Abstract: A flash unit is slidable between a retracted position in a camera body and a pop-up position outside the body. A switch enables a flash exposure control in response to movement of the flash unit out of the camera body and disables the exposure control when the flash unit is moved into the camera body. An override switches the switch to the disabling position when the flash unit is moved outside of the body and forms a discharge circuit for the flash main capacitor.Type: GrantFiled: September 6, 1977Date of Patent: May 8, 1979Assignee: Canon Kabushiki KaishaInventors: Kazuo Ikawa, Michio Hirohata, Mutsuhide Matsuda, Yukio Mashimo
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Patent number: 4142423Abstract: A strap of plastically deformable material is alternately passed over at least two rod members which are fixed to a relatively stationary portion. The stap is subjected to sucessive plastical deformations by pulling the strap from the rod members to damp a large force suddenly applied to the strap member.Type: GrantFiled: December 6, 1977Date of Patent: March 6, 1979Assignee: Nissan Motor Company, LimitedInventor: Kazuo Ikawa