Patents by Inventor John A. Ulaky

John A. Ulaky 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).

  • Photomultiplier tube having a gain modifying Nichrome dynode
    Patent number: 4347458
    Abstract: An electron discharge device includes an evacuated envelope having therein a photocathode, an anode and an electron multiplier. The electron multiplier comprises a plurality of dynodes having a nickel substrate, an exposed surface of which has a base layer of antimony sensitized with the vapors of a plurality of alkali metals. At least one Nichrome dynode, substantially devoid of secondary emissive material is disposed adjacent to the anode. The Nichrome dynode reduces and stabilizes the anode sensitivity and gain of the device.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: August 31, 1982
    Assignee: RCA Corporation
    Inventors: Charles M. Tomasetti, John A. Ulaky