Patents by Inventor Daniel R. Nardozzi

Daniel R. Nardozzi 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).

  • Stable infrared analyzer
    Patent number: 4355234
    Abstract: A double beam infrared analyzer is modulated to separately and alternately project the sample beam and comparison beam into a condenser microphone type detector thereby generating alternate pulsed signals indicating the intensity of the sample beam and comparison beam. The peak comparison beam signal is detected and maintained at a constant value through a feedback circuit controlling the degree of amplification of both the comparison beam signal and the sample beam signal, thereby providing comparison and sample signals that are corrected every cycle for analyzer instabilities.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: October 19, 1982
    Assignee: Mine Safety Appliances Company
    Inventors: Glenn H. Fertig, Daniel R. Nardozzi, Richard N. Evanuik