Patents by Inventor Guenter Roppelt

Guenter Roppelt 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).

  • Measuring method for determining the difference between an A-C voltage and another voltage, as well as a measuring device for carrying out the same
    Patent number: 4864224
    Abstract: A method for measuring the difference between two voltages with a time-controlled measuring cycle includes feeding two voltages with opposite polarity to one integrator, initially integrating up one of the voltages and subsequently integrating down the other of the voltages with the integrator in an integration cycle, and delivering a voltage corresponding to the mean valve of the difference between the voltage at an output at the conclusion of the integration cycle.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: September 5, 1989
    Assignee: Brown, Boveri & Cie Aktiengesellschaft
    Inventors: Guenter Roppelt, Fuerth Schick, Herbert Ziegler