Patents by Inventor Ernst-Friedrich Lechner

Ernst-Friedrich Lechner 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).

  • Heat-removing circuit boards
    Patent number: 4495378
    Abstract: The invention relates to circuit boards consisting of a flat core plate, 1 to 5 mm thick, of metallic material, graphite or electrically conductive carbon with a coating, 10 to 80 .mu.m thick, of electroplated aluminum eloxal and, optionally, an intermediate layer of copper or silver, 0.1 to 2 .mu.m thick. On the electroplated Al eloxal layer, a conductor run structure generated by an additive or subtractive technique may be present. The highly heat-conducting and mechanically strong circuit boards find application in electronics.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: January 22, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventors: Richard Dotzer, Ernst-Friedrich Lechner
  • Contact spring for low resistance connection of a circuit board to a grounded subassembly carrier
    Patent number: 4381878
    Abstract: A contact spring contained in a conforming recess in a guide channel has a U-shaped portion with projecting side tabs embracing the edge of a circuit board. The side tabs rest against conductors on the circuit board which carry circuit board potentials and establish a good electrical connection between the conductors and the contact spring. The contact spring also grips the circuit board. A spring leg on the contact strip goes through an opening in the guide channel and engages the subassembly carrier.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: May 3, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ernst-Friedrich Lechner, Otto Meusel
  • Hinged support for electrical devices
    Patent number: 4316236
    Abstract: A mounting structure for boards that can be equipped with electronic devices has structurally identical, adjacent frames, which are linked to each other on right angle lugs and can be flipped open like the pages of a book.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: February 16, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ernst-Friedrich Lechner, Otto Meusel, Meinhardt Muller