Patents by Inventor Witold Kotlewski

Witold Kotlewski 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).

  • In-line fire detector of a fire protection and alarm system
    Patent number: 4496930
    Abstract: A fire detector is provided with an electric insulator consisting of short segments of preferably a ceramic pipe disposed end-to-end within the space between an inside cylindrical electrode and cylindrical outside electrode. The inside electrode together with the insulator segments are covered with a thin salt-based layer and are disposed in the interior of the outside electrode so that between the insulator segments and the internal wall of the outside electrode an air space is formed along the length of the detector, whereby the insulator segments each provide a point-type contact between the internal wall of the outside electrode and the thin salt-based layer.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: January 29, 1985
    Assignee: Politechnika Warszawska
    Inventors: Maria Krecisz, Witold Kotlewski, Krzysztof Bebenkowski