Patents by Inventor Ian D. Mercer

Ian D. Mercer 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).

  • Nonlinear inductor with magnetic field reduction
    Patent number: 5350980
    Abstract: A nonlinear inductor for a CRT line timebase circuit comprises a bobbin carrying an inductive coil 41 and a first permanent magnet adjacent the coil. A second permanent magnet is positioned and oriented relative to the first magnet in such a manner that the magnetic field generated by the nonlinear inductor is substantially reduced. Because the second magnet is integral, the nonlinear inductor occupies the same printed circuit board area as a conventional nonlinear inductor. Furthermore, because the second magnet is oriented to substantially cancel the magnetic field, no additional magnets are required for deflecting the magnet field away from the CRT.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: September 27, 1994
    Assignee: International Business Machines Corporation
    Inventors: Malcom Dye, Terence K. Gibbs, Ian D. Mercer, Graham Luck