Patents by Inventor Frederick O. Bartell

Frederick O. Bartell 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).

  • Blackbody simulator with uniform emissivity
    Patent number: 4672211
    Abstract: A blackbody simulator which includes a core having a non-spherical cavity and an aperture to the cavity. A substantial portion of the cavity surface is shaped so that the value of the projected solid angle of the aperture with respect to any point of the cavity surface portion is approximately constant. Simplifications to the cavity surface are achieved by increasing the apex angle. Reductions in the size and weight to the cavity may also be achieved by reducing the ratio of the cavity depth to the aperture diameter.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: June 9, 1987
    Inventor: Frederick O. Bartell
  • Blackbody simulator with uniform emissivity
    Patent number: 4514639
    Abstract: A blackbody simulator which includes a core having a non-spherical cavity and an aperture to the cavity. A substantial portion of the cavity surface is shaped so that the value of the projected solid angle of the aperture with respect to any point of the cavity surface portion is approximately constant.
    Type: Grant
    Filed: June 7, 1983
    Date of Patent: April 30, 1985
    Inventor: Frederick O. Bartell
  • Blackbody simulator with uniform emissivity
    Patent number: 4317042
    Abstract: A blackbody simulator which includes a core having a non-spherical cavity and an aperture to the cavity. A substantial portion of the cavity surface is shaped so that the value of the projected solid angle of the aperture with respect to any point of the cavity surface portion is approximately constant.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: February 23, 1982
    Inventor: Frederick O. Bartell