Patents by Inventor David CHATAWAY

David CHATAWAY 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).

  • Publication number: 20180067201
    Abstract: A method for determining a length parameter of an electrode during operation of an electric arc furnace. An internal duct extends through the length of the electrode and is open at its lower end. A waveguide having a solid core is received in the internal duct and comprises a material having a low dielectric constant and high temperature resistance. The solid core of the waveguide includes at least one target. An electromagnetic radiation signal is emitted from a source and transmitted through the waveguide and the signal is diffracted and/or reflected from at least one target to produce at least one return signal which is transmitted back through the waveguide. A time or frequency difference between the emitted signal and the return signal is measured and the length parameter is calculated based on this difference.
    Type: Application
    Filed: November 14, 2017
    Publication date: March 8, 2018
    Inventors: Matthew H. CRAMER, Afshin SADRI, Jennifer ERSKINE, David CHATAWAY, Bert O. WASMUND, Terry GERRITSEN