Patents by Inventor Charles B. Perry

Charles B. Perry 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).

  • Multi frequency eddy current test apparatus with intermediate frequency processing
    Patent number: 4467281
    Abstract: An eddy current test apparatus and method in which multiple sequential test frequencies are employed. The voltage induced in a sensing coil at said test frequencies are multiplexed and frequency translated to provide a single frequency for processing. The apparatus employs a single channel to process the induced voltages.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: August 21, 1984
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Thomas J. Davis, Charles B. Perry
  • Machine tool
    Patent number: 4309600
    Abstract: This invention has to do with an automatic manufacturing system and, more particularly, to a plurality of work stations to which a variety of workpieces are carried by a network of conveyors, in which means are provided to identify each workpiece and means are provided to direct the workpiece through a path variable in accordance with load conditions in the network having various work stations where selected operations are automatically performed on the workpiece.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: January 5, 1982
    Assignee: Cincinnati Milacron Inc.
    Inventors: Charles B. Perry, Raymond L. Bomkamp, Kendall F. Bone
  • Digitally controlled multifrequency eddy current test apparatus and method
    Patent number: 4303885
    Abstract: Digitally controlled eddy current test apparatus for detecting flaws, their extent and location. The apparatus provides absolute and differential measurements. The apparatus employs multi-frequencies with the signals from the test coils mixed in a predetermined manner to reduce unwanted signals such as may be introduced by wobble (lift-off) and support plates.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: December 1, 1981
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Thomas J. Davis, Charles B. Perry