Patents by Inventor Bengt Sehman

Bengt Sehman 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).

  • Combination of a thyristor connection and a test device
    Patent number: 4056776
    Abstract: A thyristor connection which includes a plurality of thyristors each parallel to a voltage divider and a test device for individual testing of the individual thyristors. The test device includes a feeding circuit and a device for measuring the leakage current in one thyristor. The voltage divider for each thyristor is provided with output terminals for connecting the feeding circuit across a part of the voltage divider during measurement. There is a measuring section in series with such part of the voltage divider for connection of the measurement device. The thyristor connection is provided with an outer voltage divider in parallel with the connection which is provided with an output for connection of a point of the voltage divider to a pole of the feeding circuit.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: November 1, 1977
    Assignee: ASEA Aktiebolag
    Inventors: Karl Erik Olsson, Bengt Sehman