Patents by Inventor Alexander H. Clark

Alexander H. Clark 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).

  • Microprocessor directed optical pyrometer
    Patent number: 4375333
    Abstract: A portable automatic disappearing filament optical pyrometer having low power demand incorporating a solid state line scanner as a sensing element is controlled by a microprocessor to perform a balance between the radiation from a target and a lamp filament to provide a digital indication of the temperature of the target including compensation for emissivity of the target.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: March 1, 1983
    Assignee: Leeds & Northrup Company
    Inventors: Alexander H. Clark, John E. O'Neil, Albert S. Tenney, III