Patents by Inventor Osami Minowa

Osami Minowa 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).

  • Smoke sensor
    Patent number: 5502434
    Abstract: A separate type photoelectric smoke sensor having a light emitting section for emitting a light beam to a reflecting plate disposed at a certain distance from the light emitting section, a light receiving section for receiving reflected light from the reflecting plate, and a judgement section for outputting a sense signal if a received light output from the light receiving section is smaller than a threshold value previously set.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: March 26, 1996
    Assignee: Hockiki Kabushiki Kaisha
    Inventors: Osami Minowa, Junichi Narumiya, Tetsuya Nagashima, Yoshihito Hirai, Mariko Ishida
  • Ionization smoke sensor
    Patent number: 4044262
    Abstract: An ionization smoke sensor wherein the electric circuit of the sensor is surrounded by a first metallic case; an ionization chamber into which smoke from the exterior enters is constructed of a radiation source, an intermediate electrode and an outer electrode; the outer electrode is formed of a second metallic case; and the first and second metallic cases are electrically connected through a member of conductive elastomer, so that electric elements of the electric circuit are protected from external electrostatic charges.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: August 23, 1977
    Assignee: Hochiki Corporation
    Inventor: Osami Minowa