Patents by Inventor Samuel J. McRae

Samuel J. McRae 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).

  • Pedal volume control for electric instruments
    Patent number: 5274710
    Abstract: A variable impedance device which is connected between the preamplifier of a microphone or electric instrument and a public address system for controlling the signal volume of a musical performance. The variable resistor is controlled by a foot pedal operated by the performer so that his hands are free for an uninterrupted performance. The impedance includes a first section that can be preset manually to provide maximum desired signal volume with the footpedal in one direction (toe depressed on the pedal) and a second section that can be preset to provide minimum desired signal volume (heel depressed on the pedal).
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: December 28, 1993
    Assignee: Dunlop Manufacturing, Inc.
    Inventors: Mark S. Shaffer, Samuel J. McRae