Patents by Inventor James McCrink

James McCrink 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 detector having variable level sensitivity
    Patent number: 4792797
    Abstract: A smoke detector having variable sensitivity to smoke levels and using one button both to test the smoke detector and actuate a mode of diminished sensitivity to smoke levels. The smoke detector is operable in a normal sensitivity mode and a diminished sensitivity mode with rapid switching between the modes. The sensitivity to smoke levels is substantially constant when in either the normal or diminished sensitivity mode.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: December 20, 1988
    Assignee: Seatt Corporation
    Inventors: William P. Tanguay, James McCrink
  • Smoke detector having variable level sensitivity
    Patent number: RE33920
    Abstract: A smoke detector having variable sensitivity to smoke levels and using one button both to test the smoke detector and actuate a mode of diminished sensitivity to smoke levels. The smoke detector is operable in a normal sensitivity mode and a diminished sensitivity mode with rapid switching between the modes. The sensitivity to smoke levels is substantially constant when in either the normal or diminished sensitivity mode.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: May 12, 1992
    Assignee: Seatt Corporation
    Inventors: William P. Tanguay, James McCrink