Patents by Inventor Roger H. Peterson

Roger H. Peterson 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).

  • Electromechanical torsional oscillator with resonant frequency and amplitude control
    Patent number: 4187452
    Abstract: A limited rotation electromechanical torsional oscillator for driving a mirror in an optical deflection system. A drive armature is mounted on a torsion bar at the opposite end from the torsion bar support. The ends of the armature lie in an air gap between two pole pieces. The magnet flux in the gap is caused to vary by means of a drive winding which results in armature rotation. Resonant frequency is varied by adjustment of the length of the torsion bar and the flux density. Q is varied by means of resistance in series with the drive winding.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: February 5, 1980
    Assignee: International Business Machines Corporation
    Inventors: LaVerne F. Knappe, Roger H. Peterson, Gary J. Stroebel