Patents by Inventor Louis B. Dubowicz

Louis B. Dubowicz 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).

  • Dual arc tube discharge lamp having a lamp frame with coplanar spot welds and slip-free construction
    Patent number: 5408157
    Abstract: A high pressure discharge lamp includes a pair of arc tubes connected electrically in parallel within an outer envelope, which includes a lamp stem having a pair of stem conductors entering the lamp envelope in a common plane. The arc tubes include conductive feed-throughs at each end thereof. A lamp frame supports the arc tubes in a plane parallel with the stem conductors and is welded directly to each of the feed-throughs with all welds in a common plane with the welds between the frame and the stem conductors. The frame includes a resiliently deformable transverse member which allows for independent changes in length of the arc tubes during lamp operation due to thermal expansion/contraction. The frame is free of slip fit connections with the feed-throughs and free of additional conductive straps connected to the feed-throughs.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: April 18, 1995
    Assignee: North American Philips Corporation
    Inventors: John C. Alderman, Kathleen P. Bernard, Louis B. Dubowicz, Edward A. Putnam, Norman King