Patents by Inventor Henry Francis Blind

Henry Francis Blind 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).

  • Audio amplifier with voltage limiting in response to spectral content
    Patent number: 6914987
    Abstract: Audio signals are reproduced with consistent perception of total harmonic distortion even with varying spectral content of a particular audio signal without separately limiting different frequency bands within the audio signal. A distortion threshold representative of an amount of distortion to be allowed to be introduced by a power amplifier is determined in response to a frequency content of the audio signal. A distortion trigger compares a measured average distortion signal and the distortion threshold and reduces the controllable gain of the amplifier if the average distortion signal exceeds the distortion threshold.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: July 5, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Henry Francis Blind, John Elliott Whitecar
  • Audio amplifier with voltage limiting in response to spectral content
    Publication number: 20020090096
    Abstract: Audio signals are reproduced with consistent perception of total harmonic distortion even with varying spectral content of a particular audio signal without separately limiting different frequency bands within the audio signal. A distortion threshold representative of an amount of distortion to be allowed to be introduced by a power amplifier is determined in response to a frequency content of the audio signal. A distortion trigger compares a measured average distortion signal and the distortion threshold and reduces the controllable gain of the amplifier if the average distortion signal exceeds the distortion threshold.
    Type: Application
    Filed: December 19, 2001
    Publication date: July 11, 2002
    Inventors: Henry Francis Blind, John Elliott Whitecar
  • Exterior noise absorbing cover for automotive loudspeaker
    Patent number: 5996727
    Abstract: A noise absorbing cover is provided for an automotive loudspeaker to prevent exterior noise from being coupled through a loudspeaker to the interior of the automobile. An air gap is provided around the cover to provide a vent to static pressure for the loudspeaker, thereby avoiding any degradation in low frequency performance. The air gap is oriented to exclude direct sound transmission paths for exteriorly generated noise to the interior.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: December 7, 1999
    Assignee: Ford Global Technologies, Inc.
    Inventors: Henry Francis Blind, David Alan Dage, Alan Scott Phillips