Patents Represented by Attorney J. Stephen Yeo

Find this attorney in the Justia Lawyer Directory

  • Ultrasonic signal generator
    Patent number: 3931533
    Abstract: A controllable frequency ultrasonic signal generator for driving an ultrasonic transducer via a switching type output circuit for the efficient transfer of energy thereto. The signal generator includes a phase lock loop feedback control for locking the operation of the oscillator to the resonant frequency of the transducer for following variations in transducer resonant frequency due to loading changes, temperature changes, tool tip variations, and the like.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: January 6, 1976
    Assignee: Sybron Corporation
    Inventors: Frank A. Raso, John J. Saeli