Patents by Inventor Peter E. Perkins

Peter E. Perkins 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).

  • Patent number: 4130775
    Abstract: A cathode ray tube includes first and second electrostatic quadrupole lens between the electron gun and the vertical deflection plates to properly focus the electron beam before it enters the vertical deflection plates. A third electrostatic quadrupole lens is located between the vertical deflection plates and the horizontal deflection plates to enhance the angle of deflection as well as to aid in the proper focus of the electron beam as it moves from the vertical deflection plates into the horizontal deflection plates thereby providing substantially improved vertical sensitivity and scan expansion of the electron beam while maintaining the beam velocity constant.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: December 19, 1978
    Assignee: Tektronix, Inc.
    Inventors: Peter E. Perkins, Stephen F. Blazo