Patents Examined by Brian Mattson
  • Method and apparatus for controlling a power converter
    Patent number: 4994981
    Abstract: Apparatus controls a power converter 34 to interchange power between first and second electric sources, 30 and 32. Typically the first source 30 is a standard utility bus and the second source 32 is a storage battery. A controller generates control signals in response to the utility bus voltage, to a command specifying the required power interchange and to a feedback signal indicative of the actual power being interchanged. These signals control the power converter 34 to produce the required power interchange.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: February 19, 1991
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Loren H. Walker, Russel G. Shiflett, Roy A. Carter
  • Method and apparatus for recording a flaw in a fabric web
    Patent number: 4972326
    Abstract: Apparatus and a method records a flaw in a fabric web during a flaw inspection. The flaw is recorded by a mark placed on the fabric web along with the X- and Y-values of a system of points defining a boundary line around the flaw. The mark and a side edge of the fabric web, respectively, serve as reference points for these X-and Y-values.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: November 20, 1990
    Assignee: Krauss u. Reichert GmbH & Co. KG Spezialmaschinenfabrik
    Inventors: Rolf Jung, Albert Buss, Ulf Breckel, Winfried Buchmann