Patents by Inventor Zbignew W. Turlej

Zbignew W. Turlej 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).

  • Sensitivity test system for photoelectric smoke detector by changing light source intensity
    Patent number: 4321466
    Abstract: A tester device is disclosed for a photoelectric smoke detector. The tester, when actuated, increases the intensity of light emitted by a light source to simulate in the sample chamber by such light scattering and reflecting off chamber walls, an amount of light which would be scattered by a predetermined concentration of smoke to which a photoelectric sensor is responsive and causes an indication that the detector is functioning as intended.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: March 23, 1982
    Assignee: Isotec Industries Limited
    Inventors: John Mallory, Zbignew W. Turlej