Patents by Inventor James R. Qualey, III

James R. Qualey, III 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).

  • Multiwavelength smoke detector using white light LED
    Patent number: 7474227
    Abstract: A smoke detector includes a smoke detection chamber containing a white light LED and a light detector. The light detector detects light within at least two distinct optical wavelength bands, and generates respective signals indicative of the intensities of the detected light. An analyzer determines, based on the measured light intensities of the different wavelength bands, whether a dangerous smoke/fire condition is present.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: January 6, 2009
    Assignee: SimplexGrinnell LP
    Inventor: James R Qualey, III
  • Multiwavelength smoke detector using white light LED
    Patent number: 7233253
    Abstract: A smoke detector includes a smoke detection chamber containing a white light LED and a light detector. The light detector detects light within at least two distinct optical wavelength bands, and generates respective signals indicative of the intensities of the detected light. An analyzer determines, based on the measured light intensities of the different wavelength bands, whether a dangerous smoke/fire condition is present.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: June 19, 2007
    Assignee: SimplexGrinnell LP
    Inventor: James R. Qualey, III
  • Smoke chamber
    Patent number: 6778091
    Abstract: A smoke detecting chamber for use in a light-scattering type smoke detector is provided which includes a chamber cover that forms one side of the smoke detecting chamber. The chamber cover includes a plurality of first baffles that prevent external light from entering the smoke chamber. The smoke detector further includes a chamber base that forms another side of the smoke detecting chamber, the chamber base including a plurality of second baffles that intermesh with the first baffles when the smoke detecting chamber is formed.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: August 17, 2004
    Inventors: James R. Qualey, III, Louis Desmarais, Jayanthi Prasad, Lawrence G. Stanley, Donald D. Brighenti