Patents by Inventor Ian J. Forsyth

Ian J. Forsyth 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).

  • A.C. to A.C. power converter for the adaptive correction of waveform abnormalities
    Patent number: 5621627
    Abstract: A device for controlling an AC output with an AC load from an AC supply comprises a power amplifier module connected to the AC supply and a control module in communication with the AC supply and the power amplifier module. The power amplifier module converts an AC supply to DC and then converts the DC to an AC output. The control module extracts predetermined characteristics, such as current, voltage and frequency from the AC supply and compares the predetermined characteristics with stored load characteristics of the AC load. The control module responsively triggers the power amplifier module to generate an output waveform of the AC output substantially in phase with respect to the AC supply.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: April 15, 1997
    Assignee: AC International Inc.
    Inventors: John Krawchuk, Ian J. Forsyth, John G. H. Eriksen