Patents by Inventor Marvin Kravitz

Marvin Kravitz 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).

  • Television camera video level control system
    Patent number: 4495520
    Abstract: A video level control system 10 is provided which generates a normalized video signal for a camera processing circuit. The video level control system 10 includes a lens iris 12 which provides a controlled light signal to a camera tube 14. The camera tube 14 converts the light signal provided by the lens iris 12 into electrical signals. A feedback circuit 22 in response to the electrical signals generated by the camera tube 14, provides feedback signals to the lens iris 12 and the camera tube. This assures that a normalized video signal is provided in a first illumination range. An automatic gain control loop 50, which is also responsive to the electrical signals generated by the camera tube 14, operates in tandem with the feedback circuit 22. This assures that the normalized video signal is maintained in a second illumination range.
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: January 22, 1985
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Marvin Kravitz, Larry A. Freedman, Elmer H. Fredd, Dan E. Denef