Patents by Inventor David M. Koening

David M. Koening 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).

  • Method controlling the draw rate in the drawing of a glass feedstock
    Patent number: 5314517
    Abstract: A method for drawing glass objects from glass feedstock, wherein a dimension of the glass object is measured on-line and controlled by a control structure which compensates for the deadtime between a change to the drawing speed and the measurement of the effect of that change to the measured dimension. The model which compensates for the deadtime is preferably nonlinear, and the control gains and model parameters are preferably continuously calculated during the drawing process. The invention is particularly applicable to drawing optical waveguide cane from optical waveguide preforms.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: May 24, 1994
    Assignee: Corning Incorporated
    Inventors: David M. Koening, Peter J. Majestic, Richard O. Maschmeyer