Patents by Inventor James R. Portzer

James R. Portzer 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).

  • System for measuring optical waveguide fiber diameter
    Patent number: 4280827
    Abstract: The diameter of an optical fiber being drawn is monitored and controlled by an optical measuring technique. An electrical input signal is generated from the fringe pattern produced by directing a laser beam onto the fiber. The input signal is connected to appropriate terminals of first, second, third and fourth comparators. The input signal is delayed 180.degree. to provide an input signal to the remaining two terminals of the first and second comparators and is delayed 90.degree. to provide an input signal to the remaining terminals of the third and fourth comparators. The output pulses from the comparators are shaped, summed and counted to provide a control signal for the fiber drawing apparatus.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: July 28, 1981
    Assignee: Corning Glass Works
    Inventors: Edward F. Murphy, James R. Portzer