Patents by Inventor Charles J. Swigert

Charles J. Swigert 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).

  • System for wide bandwidth damping
    Patent number: 4633982
    Abstract: A positive electronic feedback circuit for mechanical vibration damping. The feedback circuit is connected from an output transducer fixed to a vibratable structure to an input transducer fixed to the structure. Preferably the feedback circuit has an output signal with a phase about 90 degrees lagging its input signal. Three conditions set forth herein make this possible.
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: January 6, 1987
    Inventor: Charles J. Swigert
  • Electronic cancelling of acoustic traveling waves
    Patent number: 4449235
    Abstract: An acoustic disturbance in a thin support rod may be suppressed by detecting the disturbance, and processing the detected signal with electronic circuits to generate two output signals, which are injected into the rod at spatially separate positions. It is the solution of the waveforms for the output signals that is the essence of the technique. The principal component of the electronic circuits is an integrator. There are also delay devices and summing circuits.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: May 15, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Charles J. Swigert