Patents by Inventor Lewis Eckhart

Lewis Eckhart 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).

  • Phonograph tonearm pickup counterbalance
    Patent number: 4114895
    Abstract: A low mass counterbalance assembly is provided for the tonearm of a phonograph. The counterbalance assembly includes a leaf spring and magnet that are attached to the tonearm. The magnet interacts with a second magnet attached to the base of the phonograph thereby affecting the downward tracking force of the tonearm stylus. The leaf spring modulates the interaction of the magnets.
    Type: Grant
    Filed: July 26, 1977
    Date of Patent: September 19, 1978
    Inventor: Lewis Eckhart