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).

  • Patent number: 5721986
    Abstract: 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: Grant
    Filed: December 30, 1996
    Date of Patent: February 24, 1998
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Nomura, Kazuyoshi Azegami, Takamitsu Sasaki, Yasushi Tabata, Norio Numako, Yoshinari Tanimura, Takuma Sato, Masaaki Kishimoto
  • Patent number: 5440369
    Abstract: 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: Grant
    Filed: November 30, 1993
    Date of Patent: August 8, 1995
    Assignee: Asahi Kogakuogyo Kabushiki Kaisha
    Inventors: Yasushi Tabata, Norio Numako, Kosei Kosako
  • Patent number: 5432577
    Abstract: 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: Grant
    Filed: February 14, 1991
    Date of Patent: July 11, 1995
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5430518
    Abstract: 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: Grant
    Filed: October 8, 1992
    Date of Patent: July 4, 1995
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Yasushi Tabata, Norio Numako, Takuma Sato
  • Patent number: 5384617
    Abstract: 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: Grant
    Filed: June 22, 1993
    Date of Patent: January 24, 1995
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5363164
    Abstract: 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: Grant
    Filed: September 21, 1993
    Date of Patent: November 8, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
  • Patent number: 5345288
    Abstract: 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: Grant
    Filed: July 2, 1992
    Date of Patent: September 6, 1994
    Assignee: Asahi Kogaku Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5323198
    Abstract: 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: Grant
    Filed: October 19, 1992
    Date of Patent: June 21, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Yasushi Tabata, Norio Numako, Takuma Sato
  • Patent number: 5317352
    Abstract: 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: Grant
    Filed: July 23, 1992
    Date of Patent: May 31, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5291232
    Abstract: 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: Grant
    Filed: January 21, 1992
    Date of Patent: March 1, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
  • Patent number: 5280320
    Abstract: 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: Grant
    Filed: March 23, 1993
    Date of Patent: January 18, 1994
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5257053
    Abstract: 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: Grant
    Filed: April 30, 1992
    Date of Patent: October 26, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5241334
    Abstract: 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: Grant
    Filed: August 29, 1991
    Date of Patent: August 31, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5235374
    Abstract: 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: Grant
    Filed: October 17, 1991
    Date of Patent: August 10, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai, Takao Nishida
  • Patent number: 5223887
    Abstract: 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: Grant
    Filed: December 20, 1991
    Date of Patent: June 29, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5220364
    Abstract: 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: Grant
    Filed: February 14, 1991
    Date of Patent: June 15, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5210558
    Abstract: 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: Grant
    Filed: February 14, 1991
    Date of Patent: May 11, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5181060
    Abstract: 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: Grant
    Filed: February 14, 1991
    Date of Patent: January 19, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5150147
    Abstract: 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: Grant
    Filed: February 14, 1991
    Date of Patent: September 22, 1992
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayshi, Yasushi Tabata, Norio Numako, Katsutoshi Nagai
  • Patent number: 5146259
    Abstract: 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: Grant
    Filed: February 12, 1990
    Date of Patent: September 8, 1992
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Takeo Kobayashi, Takao Nishida, Yasushi Tabata, Norio Numako, Katsutoshi Nagai