Patents by Inventor David A. Swagel

David A. Swagel 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: 4847984
    Abstract: A flexible circuit, sufficiently rigid for easy handling, is inserted once into the window of an integrally formed core member for a magnetic or ferrite head assembly. This flexible circuit contains a pattern of several parallel conductors. When the flexible circuit is bent around the core member, the ends of the parallel conductors come together. When respective ends are soldered together, a continuous multi-turn winding is created. Only one insertion is required, the flexible circuit is less prone to breakage, the electrical characteristics are repeatable, and the turns are inherently shielded and insulated from each other. Most importantly, the flexible circuit is easily adapted to an automated assembly line.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: July 18, 1989
    Assignee: International Business Machines Corporation
    Inventors: Renato V. Rossi, Steven F. Starcke, David A. Swagel
  • Patent number: 4799119
    Abstract: A flexible circuit, sufficiently rigid for easy handling, is inserted once into the window of an integrally formed core member for a magnetic or ferrite head assembly. This flexible circuit contains a pattern of several parallel conductors. When the flexible circuit is bent around the core member, the ends of the parallel conductors come together. When respective ends are soldered together, a continuous multi-turn winding is created. Only one insertion is required, the flexible circuit is less prone to breakage, the electrical characteristics are repeatable, and the turns are inherently shielded and insulated from each other. More importantly, the flexible circuit is easily adapted to an automated assembly line.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: January 17, 1989
    Assignee: International Business Machines Corporation
    Inventors: Renato V. Rossi, Steven F. Starcke, David A. Swagel