Patents by Inventor Lowell H. Koski

Lowell H. Koski 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 for rectifying a three-phase alternating signal
    Patent number: 3988660
    Abstract: A circuit for converting a three-phase alternating voltage to a rectified unidirectional output voltage including a three-phase full-wave bridge rectifier rectifying the three-phase voltage and supplying a first unidirectional voltage and a line selector providing a second unidirectional voltage representing the summation of selected segments of the three-phase voltage. The first and second unidirectional voltages are summed via respective choppers, transformers and a rectifier to provide a unidirectional output voltage.
    Type: Grant
    Filed: August 1, 1975
    Date of Patent: October 26, 1976
    Assignee: General Motors Corporation
    Inventors: David E. Ruch, Lowell H. Koski