Patents by Inventor Gerd H. Martens

Gerd H. Martens 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).

  • Patent number: 4782331
    Abstract: An arrangement for the detection of icing on the surface of an object includes an optical conductor in which the radiation from a source strikes at least one plane of the conductor, which is located in the area of the surface to be tested and which is accessible from outside the object, and a detector which receive the radiation coming from this conductor plane and converts it into an electrical signal. An evaluation device compares the signal which a threshold value and, depending on the result of the comparison, generates an alarm signal.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: November 1, 1988
    Assignee: U.S. Philips Corporation
    Inventor: Gerd H. Martens
  • Patent number: 4622465
    Abstract: A simple and sensitive arrangement for determining the presence of specific substances in a liquid is provided for determining the presence of oil in water. The arrangement comprises a light source which emits diffused UV light through the liquid to be tested, a detector which receives the UV light, and a processing circuit which is driven with a measured signal from the detector. The processing circuit generates an alarm signal if the measurement signal which increases with intensity of the detected UV light becomes smaller than the predetermined value.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: November 11, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Egon H. A. Harig, Gerd H. Martens