Patents Represented by Attorney Joseph S. Ramanow
  • Patent number: 4890030
    Abstract: A low wattage metal halide discharge lamp includes a arc tube having a temperature equalizing means telescoped thereover and an evacuated outer envelope enclosing the arc tube and convection current reducing means.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: December 26, 1989
    Assignee: GTE Products Corporation
    Inventors: William M. Keeffe, Zeya K. Krasko
  • Patent number: 4804889
    Abstract: A ceramic arc tube assembly for an arc discharge lamp includes an arc tube having openings for electrode feedthroughs at opposite ends. The feedthroughs each comprise a niobium tube having a tungsten electrode welded to it. A connection wire is welded to the feedthrough at or near the end of the niobium tube, and the feedthrough is subsequently sealed into the arc tube with the connection wire abutting the arc tube. Since the connection wire is prewelded to the feedthrough, the feedthrough can be made as short as practicable without risk of damaging the seal during welding. As a result, feedthrough material cost is substantially reduced. Preferably, the connection wire is used for locating the feedthrough in the arc tube during seal formation.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: February 14, 1989
    Assignee: GTE Products Corporation
    Inventors: David A. Reid, Roger A. Johnson, John Gutta