Patents by Inventor Yukihiko Usami

Yukihiko Usami 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).

  • Fire alarm system
    Patent number: 6081192
    Abstract: An object of the present invention is to provide a fire alarm system which is adaptable to form a large-size fire alarm system and is capable of causing a receiving portion to quickly detect fire information from a terminal unit, or the like, if the terminal unit has been operated. In a fire alarm system in which terminal units, such as fire detectors, are connected to the receiving portion, an address is given to the terminal unit to allow detection of terminal units that have a status change, wherein system polling or the like for a specific terminal unit, such as a transmitter, among the terminal units is performed prior to performing system polling of other terminal units.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: June 27, 2000
    Assignee: Nohmi Bosai Ltd.
    Inventors: Kaoru Takahashi, Keiichi Takahashi, Yukihiko Usami, Kouichi Hishino
  • Fire alarm system
    Patent number: 5790018
    Abstract: An object of the present invention is to provide a fire alarm system which is adaptable to form a large-size fire alarm system and is capable of causing a receiving portion to quickly detect fire information from a terminal unit, or the like, if the terminal unit has been operated. In a fire alarm system in which terminal units, such as fire detectors, are connected to the receiving portion, an address is given to the terminal unit to allow detection of terminal units that have a status change, wherein system polling or the like for a specific terminal unit, such as a transmitter, among the terminal units is performed prior to performing system polling of other terminal units.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: August 4, 1998
    Assignee: Nohmi Bosai Ltd.
    Inventors: Kaoru Takahashi, Keiichi Takahashi, Yukihiko Usami, Kouichi Hishino
  • Fire alarm system
    Patent number: 5650762
    Abstract: A transmitter for use with a fire alarm system controls the monitoring of devices to be controlled based on a control command transmitted from a receiving section such as a fire receiver. With this transmitter, even if there is a short circuit in control lines for connecting the transmitter and the devices, it is not necessary to exchange fuses, and it is also possible to avoid the waste of power consumption which would otherwise incur during the actuation operation of the device(s). When the short circuit is recovered, the transmitter is able to correctly actuate the device(s). A small reverse current is permitted to flow in the control lines so as to enable the monitoring of a short circuit in the control lines by the transmitter.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: July 22, 1997
    Assignee: Nohmi Bosai Ltd.
    Inventors: Kaoru Takahashi, Yukihiko Usami