Patents by Inventor Takahito Otora

Takahito Otora 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: 5040008
    Abstract: A focal-plane shutter for a camera includes two shutter blades each of which comprises two opaque plates. At least one of the two plates has a slit and is held at two points by two arms such that the plates move like a pantograph. The arms are pivotally mounted by eccentric pins to provide for adjusting the parallelism of the blades.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: August 13, 1991
    Assignee: Seikosha Co., Ltd.
    Inventors: Tadashi Nakagawa, Takahito Otora, Ichiro Nemoto
  • Patent number: 5034765
    Abstract: A focal-plane shutter for use in a camera. The shutter has a driving lever which can be driven with a substantially uniform force. The shutter comprises a closing member for actuating closing blades, the driving lever that urges the closing member to perform an exposure operation, a tension spring connecting the driving lever with the closing member, a brake lever, and an anchoring lever. The brake lever has a retaining portion that retains the closing member in its exposure end position. The anchoring lever has an anchoring portion which, when the closing member is in its exposure end position, moves out of the operating range of the closing member.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: July 23, 1991
    Assignee: Seikosha Co., Ltd.
    Inventors: Ichiro Nemoto, Takahito Otora
  • Patent number: 4954860
    Abstract: A focal-plane shutter for a camera includes two shutter blades each of which comprises two opaque plates. At least one of the two plates has a slit and is held at two points by two arms such that the plates move like a pantograph. The arms are pivotally mounted by eccentric pins to provide for adjusting the parallelism of the blades.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: September 4, 1990
    Assignee: Seikosha Co., Ltd.
    Inventors: Tadashi Nakagawa, Takahito Otora, Ichiro Nemoto
  • Patent number: 4952957
    Abstract: A focal plane shutter camera including a first chamber forming section having a baseplate with a shutter opening formed therein and which accommodates shutter blades and including a second chamber forming section which accommodates shutter controlling members. A lower plate structure member is assembled to a baseplate structure member and is provided with a lower plate for partitioning the first and second chambers.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: August 28, 1990
    Assignee: Seikosha Co., Ltd.
    Inventors: Ichiro Nemoto, Takahito Otora, Osamu Miyauchi
  • Patent number: 4929977
    Abstract: In a camera having a lens shutter and a focal-plane shutter accomplishing the operations of programed exposure and aperture control, a flash photography changeover device includes a first changeover circuit for setting a lens shutter mode for operating the lens shutter as a programed shutter or a focal-plane shutter mode for controlling the shutter speed by the focal-plane shutter and the aperture by the lens shutter; a first driving device for controlling the programed exposure value and/or the aperture value of the lens shutter; a second driving device for controlling the shutter speed of the focal-plane shutter; a sequence control circuit for controlling the operating timings of the two driving devices; a setting circuit for selecting and setting automatic exposures with a natural light and a flash light; and a coercive changeover circuit for setting the lens shutter mode irrespective of the setting of the first changeover circuit when the setting circuit is set to the automatic exposure with the flash lig
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: May 29, 1990
    Assignee: Seikosha Co., Ltd.
    Inventors: Tadashi Ishikawa, Shigeru Tagami, Kazuo Akimoto, Hiroto Tsuyuki, Michio Kawai, Kanji Ito, Takayuki Sato, Takahito Otora, Teruyo Hayakawa
  • Patent number: 4819017
    Abstract: A camera having a focal plane shutter comprising two sets of blades which are movable to form a slit which opens a shutter aperture includes a body formed from a plastic material. A rail plate having a plurality of film guide rails is attached to the camera body. A plurality of drive shafts are provided on the camera body or the rail plate for supporting at least the blades. The camera body and the rail plate define therebetween a space in which the blades are housed.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: April 4, 1989
    Assignee: Seikosha Co., Ltd.
    Inventors: Ichiro Nemoto, Ko Aosaki, Atsushi Misawa, Takahito Otora
  • Patent number: 4797699
    Abstract: A focal plane shutter for a camera comprising two sets of parallel blades positioned between the plane of a lens in the camera and the plane of a film set therein and in a parallel relation thereto. These sets of blades are movable in opposite directions between a first position in which they are unfolded to close a shutter aperture and a second position in which they are folded to form a slit to open the shutter aperture. Every two adjoining blades in each set of blades has a smaller overlapping width in their first position than in their second position. This overlapping width in the first position is smaller between two adjoining blades closer to the lens plane than between two adjoining blades closer to the film plane.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: January 10, 1989
    Assignee: Seikosha Co., Ltd.
    Inventors: Ichiro Nemoto, Ko Aosaki, Atsushi Misawa, Takahito Otora