Patents by Inventor Jiri Matej

Jiri Matej 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).

  • Circuit arrangement for decreasing the corrosion of the electrodes in a furnace for the electric melting of vitreous material
    Patent number: 4624002
    Abstract: A circuit for performing a method melting vitreous materials in an electric furnace wherein the electrodes are supplied with an alternating current of optimal frequency lower than 60 or 50 Hz, respectively, the corrosion of electrodes being minimized. The circuit comprises a cycloconverter which changes a three-phase current supply into a single-phase current with a simultaneous changing of the input mains frequency into an optimal output frequency. The circuit also comprises a device for measuring and/or controlling the direct current component of the low frequency feeding alternating current, in order to stabilize the favorable anticorrosion effect of the low optimal frequency. Further, it comprises a device for the control of the power input of the cycloconverter with respect to the melting temperature in the furnace.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: November 18, 1986
    Assignee: Vysoka skola chemicko-technologicka
    Inventors: Pavel Zahalka, Jaroslav Stanek, Jiri Matej