Patents by Inventor Leon F. Edelson

Leon F. Edelson 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).

  • Oscillatory circuit for an ultrasonic cleaning device with feedback from the piezoelectric transducer
    Patent number: 4081706
    Abstract: An improved oscillatory circuit in which the output of a radio frequency transformer is coupled from a half bridge squarewave amplifier to piezoelectric ultrasonic transducers through a serially connected feedback network. The feedback network employs a resistance connected in parallel with the serially connected combination of a capacitance, a feedback inductance and a feedback transformer. The improved feedback network provides a variable phase shift in feedback current to the half bridge squarewave amplifier tending to hold the frequency generated therein at a target frequency above anti-resonance.
    Type: Grant
    Filed: October 21, 1976
    Date of Patent: March 28, 1978
    Assignee: Delta Sonics, Inc.
    Inventor: Leon F. Edelson