Patents by Inventor Daniel K. Armstrong

Daniel K. Armstrong 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: 4283982
    Abstract: A magnetic pickup for a stringed musical instrument, comprising a polar magnet having a polar axis extending across its thinnest dimension, a coil having a magnetically permeable pole piece extending upwardly for positioning adjacent an instrument string, with the polar magnet positioned longitudinally parallel to the coil and having its polar axis perpendicular to the winding axis of the coil. Positioned within the coil is either a magnet or a pole piece. The pickup may include a plurality of coils and magnets arranged as described above to increase the effectiveness of the pickup. Also disclosed is a method for manufacturing the pickup which includes setting the pole piece, coil, magnet, and mounting bracket in a mold cavity, and casting the entire unit with potting material.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: August 18, 1981
    Inventor: Daniel K. Armstrong