Patents by Inventor David M. Zolt

David M. Zolt 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).

  • Turntable system with low aggregate resonance
    Patent number: 4387453
    Abstract: A high fidelity turntable system with low aggregate resonance is disclosed. The turntable system comprises a tone arm assembly and a belt-driven platter assembly joined rigidly by a silent substructure of pure aluminum tubing and other shapes. This low acoustic mass substructure is internally damped beyond its resonance point and is resiliently suspended from a base plate in a mounting cabinet to isolate the turntable system for substantially all resonant feedback. The acoustic mass of the turntable system and, consequently, the resonance, is further reduced by decoupling the tone arm counterweight from the tone arm assembly by means of additional resilient elements.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: June 7, 1983
    Inventor: David M. Zolt
  • Turntable system with low aggregate resonance
    Patent number: 4225142
    Abstract: A high fidelity turntable system with low aggregate resonance is disclosed. The turntable system comprises a tone arm assembly and a belt-driven platter assembly joined rigidly by a silent substructure of pure aluminum tubing. This low acoustic mass substructure is internally damped beyond its resonance point and is resiliently suspended from a base plate in a mounting cabinet to isolate the turntable system from substantially all resonant feedback. The acoustic mass of the turntable system and, consequently, the resonance, is further reduced by decoupling the tone arm counterweight from the tone arm assembly by means of additional resilient elements.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: September 30, 1980
    Inventor: David M. Zolt