Patents by Inventor Ingvar Thorn-Andersen

Ingvar Thorn-Andersen 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: 4739819
    Abstract: A device for sensing the free surface level of melt in a continuous casting mold having an electromagnetic stirrer consisting of stirrer coils and magnetic poles therefor disposed around the circumference of the mold. The device is characterized in that at least one elongated radiation source extending in the direction of casting is arranged on one side of the mold, and that a detector for the radiation with a small extension in the casting direction is arranged on substantially the diametrically opposite side of the mold but at a height different from that of the radiation source. In the radiation path from the source to the detector an oblong slot is provided for the passage of the radiation through the pole of a stirrer coil.
    Type: Grant
    Filed: December 4, 1985
    Date of Patent: April 26, 1988
    Assignee: Asea AB
    Inventors: Jan-Erik Eriksson, Ingvar Thorn-Andersen