Patents by Inventor Yasushi Tabata
Yasushi Tabata 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: 5721986Abstract: Disclosed is a camera provided with a strobe system. The strobe system includes a capacitor to be charged. Charging voltage of the capacitor can be detected through an output terminal. The output terminal can be electrically connected and disconnected to and from the capacitor by a switching element. The circuit has an input terminal which receives a control signal. In response to the control signal, charging operation is enabled, and at the same time, the switching element is controlled to connect the output terminal to the capacitor. While, if the charging voltage has reached an upper limit, the charging operation is disabled and the output terminal is disconnected from the capacitor for a predetermined period of time by changing the status of the control signal.Type: GrantFiled: December 30, 1996Date of Patent: February 24, 1998Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Hiroshi Nomura, Kazuyoshi Azegami, Takamitsu Sasaki, Yasushi Tabata, Norio Numako, Yoshinari Tanimura, Takuma Sato, Masaaki Kishimoto
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Patent number: 5440369Abstract: A compact camera has a variable focal length photographing optical system, a multisegment photometric system that is separate from the photographing optical system, each segment outputting a brightness level, and a controller that determines an exposure value for exposing a film by using weighting coefficients to calculate a weighted average of the brightness levels outputted by the photometric system. The weighting coefficients vary according to the focal length of the photographing optical system.Type: GrantFiled: November 30, 1993Date of Patent: August 8, 1995Assignee: Asahi Kogakuogyo Kabushiki KaishaInventors: Yasushi Tabata, Norio Numako, Kosei Kosako
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Patent number: 5432577Abstract: An electronically controlled camera is disclosed which is capable of being operated in an automatic release mode in which a plurality of shootings can be automatically executed. A period of time between the first shooting, of the plurality of shootings, and the start of the automatic release mode, and another period of time between, each shooting, can be set arbitrarily.Type: GrantFiled: February 14, 1991Date of Patent: July 11, 1995Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5430518Abstract: A remote control camera has a remote controller that emits a remote control signal. A remote control signal receiving device is provided in a camera body to receive the remote control signal emitted from the remote controller. The camera also includes a delaying release circuit which commences an exposure operation after a predetermined delay time, and a control circuit which actuates the delaying release circuit when the remote control signal receiving device receives the remote control signal emitted from the remote controller.Type: GrantFiled: October 8, 1992Date of Patent: July 4, 1995Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Yasushi Tabata, Norio Numako, Takuma Sato
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Patent number: 5384617Abstract: An automatic exposure control system for a camera includes selecting either a normal taking mode or an interval taking mode, determining an exposure value according to at least photometry data, setting a lower exposure value limit, wherein the lower exposure value limit in the interval taking mode is lower than the lower exposure value limit in a normal taking mode, and a strobe that operates when the exposure value is lower than the lower limit.Type: GrantFiled: June 22, 1993Date of Patent: January 24, 1995Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5363164Abstract: An electronically controlled camera having a macro mode operating capability which is disabled in the event predetermined object-distance-information is not obtained which is required for automatically focusing the camera in the macro mode. In this event, the lens is automatically shifted from the macro position to a non-macro position to enable a properly focused photograph to be taken. The shifting of the lens is preferably performed in response to actuation of the shutter release button while the lens is in the macro position, without further actuation of the shutter release button. Further, the camera can be arranged to return the lens to a macro position after the photograph is taken.Type: GrantFiled: September 21, 1993Date of Patent: November 8, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
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Patent number: 5345288Abstract: An electronically controlled camera is provided capable of being operated in an automatic release mode in which a plurality of shootings can be automatically executed. The camera includes a device for setting the number of shootings to be executed and a device for automatically setting the internal time between each shooting in accordance with the number of shootings set to be executed.Type: GrantFiled: July 2, 1992Date of Patent: September 6, 1994Assignee: Asahi Kogaku Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5323198Abstract: A film winding apparatus of a camera for winding and/or rewinding a perforated film. The film winding apparatus includes a photoelectric member that is opposed to perforations of the film to detect presence or absence of the perforations in the film. A predetermined reference value, along with an upper threshold value and a lower threshold value, is set in accordance with an initial signal output by the photoelectric member. A second mechanism detects a feed position of the film by comparing a rising output curve and a descending output curve produced by the photoelectric member with the upper and lower threshold values of the predetermined reference value.Type: GrantFiled: October 19, 1992Date of Patent: June 21, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Yasushi Tabata, Norio Numako, Takuma Sato
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Patent number: 5317352Abstract: An electronically controlled camera comprises a zoom lens which is capable of being driven to move in the direction of the optical axis thereof within a zooming area between a tele extremity and a wide extremity. A single operation member is provided for instructing the movement direction of the zoom lens, and the zoom lens is driven to move either stepwisely or continuously in accordance with the operating amount of the operation member.Type: GrantFiled: July 23, 1992Date of Patent: May 31, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5291232Abstract: An electronically controlled camera having a macro mode operating capability which is disabled in the event predetermined object-distance-information is not obtained which is required for automatically focusing the camera in the macro mode. In this event, the lens is automatically shifted from the macro position to a non-macro position to enable a properly focused photograph to be taken. The shifting of the lens is preferably performed in response to actuation of the shutter release button while the lens is in the macro position, without further actuation of the shutter release button. Further, the camera can be arranged to return the lens to a macro position after the photograph is taken.Type: GrantFiled: January 21, 1992Date of Patent: March 1, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
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Patent number: 5280320Abstract: An electronically controlled camera which takes a picture every time a preset interval passes and displays remaining time available until a picture taking operation is effected on a display portion by reducing the interval time. A display portion displays the taking number and prohibits the display of the remaining time at a time when interval photographing is being performed.Type: GrantFiled: March 23, 1993Date of Patent: January 18, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5257053Abstract: A position detecting arrangement for detecting the position of a movable member relative to a reference position. The arrangement is particularly adapted for use in connection with electronically controlled cameras which include a zoom lens and includes a code information carrier which is able to transmit information indicative of a plurality of codes, at least one of the codes being used a plurality of times for identifying more than one position of the zoom lens, i.e., more than one focal length of the lens. The use of such "relative" codes permits the camera to be made more compact. However, the disclosed invention includes an arrangement for retaining a given number of "position" codes which correspond to the actual position of the lens, to thereby enable the camera to retain a given degree of accuracy in its object-distance-measuring unit for focusing the zoom lens.Type: GrantFiled: April 30, 1992Date of Patent: October 26, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5241334Abstract: An electronically controlled camera having a zoom lens has an operational member for driving the zone lens between a tele position and a wide angle position. The zoom lens is moved toward the tele position when the operational member is moved in a normal direction. The zoom lens is moved toward the wide angle position when the operational member is moved in the reverse direction. A taking mode changing mechanism changes taking modes. A display device displays a taking mode. A control mechanism changes the taking mode to another taking mode when the taking mode changing mechanism is operated. A setting time changing device changes the setting time of a manual shutter (or interval) to another setting time under predetermined conditions when the camera is set in a manual shutter mode (or interval) and both the operational member and the taking mode changing mechanism are operated.Type: GrantFiled: August 29, 1991Date of Patent: August 31, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5235374Abstract: An electronically controlled camera having a macro mode operating capability which is disabled in the event predetermined object-distance-information is not obtained which is required for automatically focusing the camera in the macro mode. In this event, the lens is automatically shifted from the macro position to a non-macro position to enable a properly focused photograph to be taken. The shifting of the lens is preferably performed in response to actuation of the shutter release button while the lens is in the macro position, without further actuation of the shutter release button. Further, the camera can be arranged to return the lens to a macro position after the photograph is taken.Type: GrantFiled: October 17, 1991Date of Patent: August 10, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
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Patent number: 5223887Abstract: An apparatus for monitoring the operation of a measuring unit for obtaining information related to a predetermined parameter. The measuring unit provides an indication of said information having been measured, which can take the form of an indicator lamp, for example. The measuring unit includes a mechanism for inhibiting operation of the indicator for a predetermined time interval, after the elapse of a time period which is related to the information obtained by said measuring unit. The monitoring apparatus measures the length of time of the time period and provides an indication of the time period measured, preferably in terms of the monitored parameter. The disclosed invention is particularly suited to the monitoring of an distance measuring unit or a photometric unit for an automatic camera so that proper operation of such units can be confirmed without having to disassembly the camera.Type: GrantFiled: December 20, 1991Date of Patent: June 29, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5220364Abstract: In an exposure control device employed in an electronically controlled camera, an exposure value, representing the relation between an exposure time and an aperture value, is determined in accordance with the brightness of an object to be photographed. In addition, the open F-number of a lens is determined based on a predetermined film sensitivity. When the exposure value is determined, it is limited to a predetermined minimum exposure value. In the camera, the minimum exposure value is compensated in accordance with the film sensitivity of the film to be used.Type: GrantFiled: February 14, 1991Date of Patent: June 15, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5210558Abstract: An electronically controlled camera comprises a zoom lens which is capable of being driven to move in the direction of the optical axis thereof within a zooming area between a tele extremity and a wide extremity. A single operation member is provided for instructing the movement direction of the zoom lens, and the zoom lens is driven to move either stepwisely or continuously in accordance with the operating amount of the operation member.Type: GrantFiled: February 14, 1991Date of Patent: May 11, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5181060Abstract: In an electronically controlled camera capable of being operated in an automatic release mode in which a plurality of shootings can be automatically executed, when the number of shootings to be executed, the interval time between each shooting is automatically set in accordance with the set number of shootings to be executed.Type: GrantFiled: February 14, 1991Date of Patent: January 19, 1993Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5150147Abstract: In an electronically controlled camera, if an operating status thereof has been kept unchanged for a predetermined period of time, the operating status is automatically stored and power supply to the camera is automatically prohibited. When power is resupplied to the camera within another predetermined period of time, the operating status of the camera is set to the status which was stored before the prohibition of power supply.Type: GrantFiled: February 14, 1991Date of Patent: September 22, 1992Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
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Patent number: 5146259Abstract: An electronically controlled camera having a zoom function for changing a focal length of a taking lens and a manual function which is able to select the shutter speed by the manual operation when the camera is in a manual mode, shutter speed automatic changing apparatus automatically changes the shutter speed in the direction for reducing the changing amount of the Full-open Aperture F-number which is changed in accordance with the change of the focal length so that the exposure value becomes a predetermined value in accordance with the reference shutter speed at a time when said reference shutter speed is selected in the manual mode and said focal length is changed by said zoom function.Type: GrantFiled: February 12, 1990Date of Patent: September 8, 1992Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai