Patents by Inventor Lourens P. Swanepoel

Lourens P. Swanepoel 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).

  • Fire detectors
    Patent number: 3980928
    Abstract: A fire detector of the type including a smoke chamber and a grid supported in the chamber on an insulating element. In order to prevent the flow of leakage currents from the grid to the body of the chamber an electrically-conductive element is arranged around the insulating element in circumferential contact therewith. The electrically-conductive element is arranged to be at the same potential as the grid so that no leakage currents are able to flow from the grid to the body of the chamber.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: September 14, 1976
    Inventors: Timothy J. Newington, Lourens P. Swanepoel