Patents by Inventor Yukio Ogawa
Yukio Ogawa 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: 5032863Abstract: A shutter device for a still video camera comprises first and second shutter blades, a latch member and an unlatch member. The latch member latches the first blade at its moved position where an image pickup element is exposed to an image light. The first blade is kept latched for a preparatory exposure to correct a set exposure value on the basis of the output of the pickup element or for picking up a motion picture. The unlatch member releases the latching of the first blade. In one embodiment, the unlatch member is provided on the second blade to unlatch the first blade when the second blade is moved to terminate the exposure. In other embodiments, the unlatch member includes an electromagnet to unlatch the first blade.A still video camera comprises a view finder mirror and a mirror operating mechanism. The mechanism includes a motor and is arranged to retract and return the mirror relative to an optical path by utilizing a normal and a reverse rotation of the motor, respectively.Type: GrantFiled: February 27, 1990Date of Patent: July 16, 1991Assignee: Canon Kabushiki KaishaInventors: Nobuaki Date, Akio Sunouchi, Syuichiro Saito, Yoshitaka Murata, Yukio Ogawa, Nobuo Tezuka
-
Patent number: 5019843Abstract: A camera has a data imprinting function provided with transport means for transporting photosensitive means, data imprinting means for imprinting data on a frame of the photosensitive means during transportation by the transport means after that frame of the photosensitive means has been exposed, reader means for reading the regular maximum number of exposure frames from a code provided on the photosensitive means, counter means for counting the number of exposed frames of the photosensitive means, and restricting means for restricting, on the basis of the regular maximum number of exposure frames read out by the reader means and the counted content of the counter means, restricting the imprinting data on the photosensitive means during transportation beyond either the last frame or the last frame but one of the regular maximum number of exposure frames.Type: GrantFiled: July 31, 1990Date of Patent: May 28, 1991Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Kiyoshi Alyfuku
-
Patent number: 5005038Abstract: The disclosed camera changes between two focal lengths by bringing or taking a built-in attachment lens into and out of axial alignment with a master lens. A single electric motor serves as the drive source both for changing the focal length and effecting automatic focusing. The attachment lens is brought into axial alignment with the master lens for telephoto operation and taken out of axial alignment with the master lens for standard operation.Type: GrantFiled: June 27, 1990Date of Patent: April 2, 1991Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Michio Hirohata, Takanori Kodaira, Makoto Miyawaki
-
Patent number: 4973888Abstract: An image display device capable of uniforming luminance over a whole display plane. The image display device includes a plurality of vertical selecting electrodes each adapted to adjust an intensity of each of electron beams for every one of a plurality of cathodes. The device may include a protective electrode for insulating a low voltage region for selecting and deflecting of each electron beam and a high voltage region for accelerating the electron beam from each other.Type: GrantFiled: March 27, 1989Date of Patent: November 27, 1990Assignee: Futaba Denshi Kogyo K.K.Inventors: Kiyoshi Morimoto, Hiroshi Watanabe, Yukio Ogawa
-
Patent number: 4945379Abstract: A shutter device for a still video camera comprises first and second shutter blades, a latch member and an unlatch member. The latch member latches the first blade at its moved position where an image pickup element is exposed to an image light. The first blade is kept latched for a preparatory exposure to correct a set exposure value on the basis of the output of the pickup element or for picking up a motion picture. The unlatch member releases the latching of the first blade. In one embodiment, the unlatch member is provided on the second blade to unlatch the first blade when the second blade is moved to terminate the exposure. In other embodiments, the unlatch member includes an electromagnet to unlatch the first blade.A still video camera comprises a view finder mirror and a mirror operating mechanism. The mechanism includes a motor and is arranged to retract and return the mirror relative to an optical path by utilizing a normal and a reverse rotation of the motor, respectively.Type: GrantFiled: August 7, 1989Date of Patent: July 31, 1990Assignee: Canon Kabushiki KaishaInventors: Nobuaki Date, Akio Sunouchi, Syuichiro Saito, Yoshitaka Murata, Yukio Ogawa, Nobuo Tezuka
-
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
-
Patent number: 4881005Abstract: A flat type display device capable of being substantially thinned and carrying out display of very high definition on a large image plane. A plurality of electron streams emitted from a cathode arranged at one end of a airtight casing in a manner to be deviated from a phosphor screen section are guided and turned toward the phosphor screen section. Then, the electron streams are selected and controlled by an address electrode section, resulting in formation of an electron beam, which is then accelerated by an accelerating electrode section and impinged on the phosphor screen section for desired luminous display.Type: GrantFiled: July 8, 1988Date of Patent: November 14, 1989Assignee: Futaba Denshi Kogyo Kabushiki KaishaInventors: Kiyoshi Morimoto, Hiroshi Watanabe, Shigeo Itoh, Yukio Ogawa, Satoshi Uzawa
-
Patent number: 4811060Abstract: An optical system shifting device for a camera in which an optical system is shifted in the direction of the optical axis by the driving force of a motor, wherein a first positioning member effects the positioning of the optical system in the direction of the optical axis independently of the driving force of the motor, a second positioning member effects the positioning of the optical system in a direction perpendicular to the optical axis of the optical system, and a switching member actuates the motor by giving an external force to the optical system, whereby the functional features as well as maneuverability of the optical system shifting device are improved.Type: GrantFiled: February 1, 1985Date of Patent: March 7, 1989Assignee: Canon Kabushiki KaishaInventors: Makoto Miyawaki, Yukio Ogawa, Takanori Kodaira, Michio Hirohata
-
Patent number: 4802470Abstract: An electric field therapy apparatus having electrodes connected to a pair of output terminals characterized in that an intermediate point between the output terminals is connected, as a voltage point, ground. With this arrangement, each of the electrodes can be constructed so as to make withstand voltage to ground small, and the electric potential difference between the electrodes can be made large.Type: GrantFiled: March 2, 1987Date of Patent: February 7, 1989Assignee: Hakuju Institute For Health Science Co., Ltd.Inventors: Akikuni Hara, Yukio Ogawa
-
Patent number: 4780734Abstract: A camera is arranged such that when a film housed in a film cartridge is loaded into a film cartridge chamber of the camera with a leader portion of the film remaining outside the camera and upon closure of the film cartridge chamber, the leader portion of the film is retracted into the camera and the film is wound onto a film winding spool. This camera comprises a retracted-amount measuring system for measuring the retracted-amount of film when the leader portion thereof is retracted into the camera and a wound-amount detector responsive to an output of the retracted-amount measuring system to determine the amount of the film wound onto the film winding spool.Type: GrantFiled: January 4, 1988Date of Patent: October 25, 1988Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Toyotoshi Suzuki, Kiyoshi Alyfuku
-
Patent number: 4779111Abstract: A camera is arranged such that when a film housed in a film cartridge is loaded into a film cartridge chamber of the camera with a leader portion of the film remaining outside the camera and upon closure of the film cartridge chamber, the leader portion of the film is automatically retracted into the camera and the film is wound onto a winding spool. This camera is characterized by providing a detector for detecting occurrence of an abnormal state of movement of the film during operation of retraction of the leader portion of the film into the camera, or during operation of winding the film onto the winding spool, and a warning system responsive to the abnormal-state detector to stop the movement of the film or to produce a warning of the occurrence of the abnormal state.Type: GrantFiled: January 4, 1988Date of Patent: October 18, 1988Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Toyotoshi Suzuki, Kiyoshi Alyfuku
-
Patent number: 4725864Abstract: In a vari-focal camera which has a photo-taking optical system including a main lens system and an auxiliary lens system and is arranged to be shiftable between at least two different focal lengths by moving the photo-taking optical system back and forth on a photo-taking optical axis in such a way as to cause the auxiliary lens system to move onto and out of the optical axis, a guide bar is arranged to allow a lens barrel unit which includes the photo-taking optical system, a shutter and a photo-taking lens focusing device to straightly move. The guide bar is fittingly engaged with a member secured to a camera body. The camera is further provided with an adjusting member for focusing the photo-taking optical system in each of preset positions in which the photo-taking lens has the different focal lengths.Type: GrantFiled: October 16, 1985Date of Patent: February 16, 1988Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Michio Hirohata, Takanori Kodaira
-
Patent number: 4724450Abstract: A motorized camera having a gear train between an electric reversible motor and a film rewind fork with a mechanism for transferring the driving torque from an intermediate gear of the train to move a member having function other than film transportation as the gear is out of mesh with the next one, wherein a mechanism is provided between the last gear of the train and the rewind fork so that only when the last gear has rotated by a prescribed angular distance, the fork starts to engage the supply spool of the film cartridge to rewind the film.Type: GrantFiled: April 28, 1987Date of Patent: February 9, 1988Assignee: Canon Kabushiki KaishaInventors: Makoto Miyawaki, Yukio Ogawa, Takanori Kodaira, Michio Hirohata
-
Patent number: 4688919Abstract: Disclosed is an automatic focusing camera capable of measuring a wide range of distances by setting a plurality of focus targets in the photographic picture plane, so designed that when the photographic picture angle changes due to changes in the focal length of the photographic lens the distance is measured by focus targets whose numbers corresponds to the photographic picture angles, to avoid mismeasurement of the distance.Type: GrantFiled: February 12, 1985Date of Patent: August 25, 1987Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Hideo Taka
-
Patent number: 4643554Abstract: In a camera which has an automatic focusing device and is arranged to permit a change-over from one focal length of the photo taking optical system thereof to another, the focusing position of the automatic focusing device is arranged to vary in response to the focal length change-over of the photo taking optical system, so that the focusing operation can be always carried out appositely to the selected focal length of the optical system.Type: GrantFiled: November 1, 1985Date of Patent: February 17, 1987Assignee: Canon Kabushiki KaishaInventor: Yukio Ogawa
-
Patent number: 4630136Abstract: A reproduced signal switching circuit for a reproducing apparatus, comprises a switching circuit for switching output signals of rotary heads for special reproduction so as to obtain a continuous reproduced signal, a switching signal producing circuit for producing a switching signal responsive to an output pickup pulse of a rotation detecting circuit which detects the rotation of a rotary body which is mounted with the rotary heads, and for applying the switching signal to the switching circuit so as to switch the switching circuit, and a voltage supplying circuit for supplying a voltage which is in accordance with a tape moving speed to the switching signal producing circuit during the special reproduction. The switching signal producing circuit comprises time constant circuits for starting charging operations responsive to the pickup pulse, and a circuit for producing a switching signal having a polarity which changes when charged voltages in the time constant circuits reach a predetermined voltage.Type: GrantFiled: September 20, 1984Date of Patent: December 16, 1986Assignee: Victor Company of Japan, Ltd.Inventors: Yukio Ogawa, Koji Matsumura
-
Patent number: 4601563Abstract: In the automatic film transportation type camera using an electric motor in which upon a forward rotation thereof the film is wound and upon a reversed rotation thereof the film is rewound, a mechanism for moving a photographic lens barrel between a standard or wide angle setting and a telephoto setting is provided with a clutch capable of transferring the motion of the motor from a rewind fork to the moving mechanism, and a switch arranged to be closed when the clutch is cut off, thereby the motor is energized to rotate in the reverse direction, driving the barrel to move axially from one of the settings to the other, while leaving the rewind fork stationary.Type: GrantFiled: October 25, 1984Date of Patent: July 22, 1986Assignee: Canon Kabushiki KaishaInventors: Makoto Miyawaki, Michio Hirohata, Yukio Ogawa, Takanori Kodaira
-
Patent number: 4420237Abstract: A camera having an electromagnetically driven shutter provided with a counter capable upon counting a present number producing a signal. Each time the shutter is closed, the counted value is changed, while the period of actuation of the shutter is controlled to effect a predetermined fraction of an exposure, so that a continuous sequence of shots equal in number to that preset in the counter are taken automatically.Type: GrantFiled: December 17, 1982Date of Patent: December 13, 1983Assignee: Canon Kabushiki KaishaInventors: Yukio Ogawa, Isao Harigaya, Tateo Yamada, Michio Hirohata
-
Patent number: 4415252Abstract: An electromagnetically operated shutter includes a conductive member which has a number of radial components from the center of rotation of a sector ring, and is arranged on a plane parallel with the sector ring. The conductive member is secured to the sector ring, and a Lorentz force is generated by a magnetic field in the direction of the photographing optical axis, which force is applied to the conductive member so that the sector ring is caused to rotate to open and close the photographing optical path with a set of shutter blades. The radial components of the conductive member are arranged to be long by concentrating them in the vicinity of the diagonal lines of a rectangular space within a camera, and the conductive member is arranged to be rotatable within a predetermined angle range in this vicinity. The conductive member can be formed into a printed pattern which is arranged to increase, within a limited coil length, the length of the effective portion thereof for generating the Lorentz force.Type: GrantFiled: March 1, 1982Date of Patent: November 15, 1983Assignee: Canon Kabushiki KaishaInventors: Michio Hirohata, Yukio Ogawa
-
Patent number: 4390262Abstract: An electromagnetic diaphragm shutter mechanism is provided with an electromagnet in the form of a coil or a printed circuit pattern arranged on a sector ring of the shutter mechanism. With a magnetic field applied to the electromagnet, when current is caused to flow therethrough in a prescribed direction, the sector ring is driven to rotate. A light measuring diaphragm mechanism related to the exposure diaphragm of the shutter blades serves to control the shutter and to improve the accuracy of program control of the shutter, the sector ring being always urged to move in a direction to close the shutter.Type: GrantFiled: September 23, 1981Date of Patent: June 28, 1983Assignee: Canon Kabushiki KaishaInventors: Michio Hirohata, Yukio Ogawa, Tetsuya Taguchi