Patents by Inventor Wesley H. Harker

Wesley H. Harker 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).

  • Method and apparatus for non-destructively determining ingredients of a sample
    Patent number: 4496907
    Abstract: A test apparatus is provided for measuring the proportion of at least one constituent in a sample of material, which constituent bears a known relationship to the electrical conductivity of the sample. The test apparatus comprises a sensor including both a receptacle for receiving a sample of material and a field producing coil for producing an electromagnetic field within the receptacle. The coil is also designed confining said electromagnetic field to a predetermined, fixed volume within the receptacle and for producing a substantially constant magnitude electromagnetic field throughout this predetermined, fixed volume. A monitoring circuit is coupled with the sensor and is responsive thereto for producing an output signal which bears a predetermined relationship with the real impedance of the sensor and therefore with the conductivity of the sample.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: January 29, 1985
    Assignee: Dickey-John Corporation
    Inventors: David B. Funk, James D. Kallmeyer, Wesley H. Harker