Patents by Inventor Yutaka Kamijo

Yutaka Kamijo 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: 6252223
    Abstract: A rotary encoder 10 comprises a rotary shaft 12 supported for rotation about its axis AX and a disk 16 made of an insulating substrate with a conductive pattern 17 formed on a side surface thereof. The rotary shaft 12 has a pair of axially-extending, threaded holes 14a and 14b formed therein at its one end. The desk 14 is fixedly secured to the rotary shaft 12 by means of a pair of set screws 19a and 19b threadably engaged into the threaded holes 14a and 14b formed in the rotary shaft 12 such that the disk 16 is rotatable about a rotational center defined by the axis AX of the rotary shaft 12. A plurality of electrical contacts 20a-20e are fixedly mounted on a circuit board 22 and so arranged as to be in contact with the conductive pattern 17 depending on the angular position of the disk 16 such that various combinations of the electrical contacts 20a-20e may be electrically interconnected one another depending on the angular position of the disk 16.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: June 26, 2001
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Yutaka Kamijo
  • Patent number: 6021006
    Abstract: An optical system comprises a pentagonal roof prism and a transparent plate. A rear surface of the pentagonal roof prism is provided with a triangular recessed portion. The wall of the recessed portion is frosted. The transparent plate is a triangular plate, slightly smaller than that of the recessed portion, and is applied to the wall of the recessed portion. The obverse face of the transparent plate is a transparent or polished surface. The transparent plate is applied to the recessed portion with adhesive having photo-transmissibility. It is preferable that the adhesive does not shrink when hardening.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: February 1, 2000
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Etsuro Nishio, Yutaka Kamijo, Isamu Hirai
  • Patent number: 5969869
    Abstract: A prism has a notch at a lower end of a third reflection plane of a pentagonal roof prism. The notch has a frosted wall, on which a transparent plate is adhered with adhesive. A miniature prism is adhered to the transparent plate with adhesive. The adhesive has photo-transmissibility, so that a transparent plane is formed between the pentagonal prism, the transparent plate and the miniature prism. Information displayed by an indication device is directed to an eyepiece optical system, via a mirror and the miniature prism.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: October 19, 1999
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Isamu Hirai, Etsuro Nishio, Yutaka Kamijo
  • Patent number: 5915134
    Abstract: A release switch is directly activated by a self-timer button, and a shutter release button first activates a photometric switch, then the release switch. The self-timer operation is carried out in response to the activation of only the release switch, a photometric operation is carried out in response to the activation of only the photometric switch, and a shutter release operation is carried out in response to the secuential activation of both the photometric switch and the release switch.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: June 22, 1999
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Akihiro Arai, Yutaka Kamijo
  • Patent number: 5839010
    Abstract: A release switch is directly activated by a self-timer button, and a shutter release button first activates a photometric switch, then the release switch. The self-timer operation is carried out in response to the activation of only the release switch, a photometric operation is carried out in response to the activation of only the photometric switch, and a shutter release operation is carried out in response to the sequential activation of both the photometric switch and the release switch.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: November 17, 1998
    Assignee: Asahi Kogaku Kabushiki Kaisha
    Inventors: Akihiro Arai, Yutaka Kamijo
  • Patent number: 5678107
    Abstract: A release switch is directly activated by a self-timer button, and a shutter release button first activates a photometric switch, then the release switch. The self-timer operation is carried out in response to the activation of only the release switch, a photometric operation is carried out in response to the activation of only the photometric switch, and a shutter release operation is carried out in response to the sequential activation of both the photometric switch and the release switch.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: October 14, 1997
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Akihiro Arai, Yutaka Kamijo