Patents by Inventor John A. Pappas

John A. Pappas 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).

  • High intensity reflector lamp
    Patent number: 4345178
    Abstract: A reflector lamp comprises an arc discharge tube disposed at about the focus of a parabolic reflector. The arc tube is supported by two lead-in support wires which extend through the back of the reflector. The external ends of the lead-in support wires are secured in a stabilizer support which is adhesively bonded to the back of the reflector.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: August 17, 1982
    Assignee: GTE Products Corporation
    Inventors: John A. Pappas, Roger T. Hebert
  • Flashing light indicator structures
    Patent number: 4253085
    Abstract: An indicator structure including one or more lengths of perforated tubing arranged in a desired configuration, such as a traffic barricade. The tubing contains one or more flash lamps which produce a light-tunnel effect during operation to provide a high intensity warning or indicating signal in a pre-selected configuration of flash illumination via the tubing perforations.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: February 24, 1981
    Assignee: GTE Products Corporation
    Inventors: Henry T. Hidler, John M. Lo, John A. Pappas
  • Lamp and lens retrofit assembly for overhead projector
    Patent number: 4023893
    Abstract: A retrofit assembly for replacing a lens-containing lamp in an overhead projector. The assembly comprises a quartz-halogen lamp, having an internal reflector and an enlarged base removably mounted in the projector, and a lens holding bracket removably mounted in the projector in alignment with the lamp. The bracket is resiliently pivoted toward the lamp and has a tab for striking the lamp base to retain the lens at a predetermined distance from the lamp.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: May 17, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Roger T. Hebert, John A. Pappas, Richard J. Shea
  • Deuterium arc lamp
    Patent number: 4016445
    Abstract: A UV source comprising an arc lamp containing deuterium gas at an initial fill pressure in excess of that at which peak UV light intensity occurs, thereby extending the useful life of the lamp.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: April 5, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert L. Cassidy, Robert J. Cosco, John A. Pappas
  • Three-electrode short duration flash tube
    Patent number: 4004189
    Abstract: A flash tube having an elongated tubular envelope containing a pair of anode electrodes disposed at opposite ends and a centrally located cathode electrode which is common to both anodes for simultaneously defining two separate arc discharge paths during operation. The three-electrode configuration is particularly useful in photograhic and photocopying applications for minimizing dark spots and providing a shorter flash duration.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: January 18, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert J. Cosco, John A. Pappas, Thomas A. Brewin
  • Arc discharge lamp with integral trigger electrode
    Patent number: 3993922
    Abstract: A high voltage xenon filled flash tube has a trigger conductor wire embedded in the glass envelope of the tube or in an aluminum reflector on the tube. The wire does not penetrate the glass envelope nor enter the gas filled volume through which arc discharge occurs.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: November 23, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: Robert J. Cosco, John A. Pappas, Roger T. Hebert