Patents by Inventor Arthur Frederick McDonie

Arthur Frederick McDonie 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).

  • Electron emitter including porous antimony
    Patent number: 4039887
    Abstract: A reflective type photocathode of a photomultiplier includes a porous antimony layer in overlay relation to a layer of solid antimony along a supporting substrate.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: August 2, 1977
    Assignee: RCA Corporation
    Inventor: Arthur Frederick McDonie
  • Method of sensitizing electron emissive surfaces of antimony base layers with alkali metal vapors
    Patent number: 4002735
    Abstract: In a photomultiplier tube, antimony layers of a photocathode and a plurality of dynodes are simultaneously sensitized by exposure to the vapors of sodium and potassium at an initial temperature of less than about 120.degree. C. The temperature of exposure is gradually increased at a rate of less than about 10.degree. C. per minute until a final temperature of about 200.degree. C. is reached. Then, the photocathode and dynodes are baked at the final temperature until substantially maximum photosensitivity is achieved. The photocathode and dynodes are thereafter exposed to cesium and may be superficially oxidized until substantially maximum photosensitivity is achieved.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: January 11, 1977
    Assignee: RCA Corporation
    Inventors: Arthur Frederick McDonie, Charles Michael Tomasetti