Patents by Inventor Mitutoshi Moriya

Mitutoshi Moriya 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 sensing apparatus of the light scattering type
    Patent number: 4649282
    Abstract: In a smoke sensing apparatus, a light receiving circuit including a light receiving element senses light emitted from a light emitting circuit including a light emitting element and scattered by smoke, and a voltage holding circuit converts the output signal of the light receiving circuit into a d.c. voltage and holds the d.c. voltage. A mean value circuit averages the voltage signal from the voltage holding circuit, and a switching circuit acts to bring the output of the mean value circuit to a level close to that of the output of the voltage holding circuit. A comparison circuit compares the output of the means value circuit with the output of the voltage holding circuit thereby generating a control signal.
    Type: Grant
    Filed: February 5, 1985
    Date of Patent: March 10, 1987
    Assignee: Nippondenso Co., Ltd.
    Inventors: Kazuomi Ota, Minoru Kato, Seiichi Narita, Mitutoshi Moriya