Patents by Inventor Zbigniew Turlej

Zbigniew 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).

  • Ionization smoke detector
    Patent number: 4631412
    Abstract: In a smoke detector of the ionization type having inner, auxiliary and outer electrodes providing inner and outer ionization chambers disposed one within the other, the electrodes and the associated circuitry are mounted on one side of a printed circuit board, the outer electrode conforming to the configuration and dimensions of the circuit board so as to define a box-like enclosure.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: December 23, 1986
    Inventor: Zbigniew Turlej
  • Dual ionization chamber
    Patent number: 4245174
    Abstract: In an electronic smoke sensing and alarm device, a dual ionization chamber arrangement comprises a single source of radioactive material and first and second chambers separated by a common electrically conductive electrode. A portion of the radioactive material ionizes the air in the first chamber and another portion of the radioactive material ionizes the air in the second chamber. This arrangement provides an accurate control on the current flow through each chamber.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: January 13, 1981
    Assignee: Isotec Industries Limited
    Inventors: John Mallory, Zbigniew Turlej