Patents by Inventor Eduard J. P. Janssen

Eduard J. P. Janssen 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).

  • Double-ended lamp including lamp cap at each end
    Patent number: 5001388
    Abstract: The electric lamp has ceramic lamp caps (7, 8) secured to the lamp vessel (1) without the use of cement. This is realized by securing the cable (9) to the current supply conductor (5) after the lamp cap (7) has been provided. Securing is made possible by the shape of the lamp cap (7) which has a cavity (13) for the seal (2) of conductor (5), which duct runs into a recess (14) for the cable (9). A bore (15) enables the cable (9) to be connected to the current supply conductor (5) after the lamp cap (7) has been provided.
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: March 19, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Eduard J. P. Janssen, Victor R. Notelteirs
  • Electric cooking unit having an electric lamp with a helical filament contact with the lamp vessel wall
    Patent number: 4857709
    Abstract: An electric cooking unit having a housing having a base wall and side walls provided with apertures. The unit further has an IR lamp with a tubular glass lamp vessel, which is sealed in a vacuum-tight manner and in which a tungsten filament is arranged, whose turns directly engage the wall of the lamp vessel. During operation, the filament has a temperature lying between approximately 1200.degree. C. and approximately 1500.degree. C.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: August 15, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Eduard J. P. Janssen, Victor R. Notelteirs
  • Electric lamp having a fuse in a feed-through molding
    Patent number: 4570104
    Abstract: A lamp having a ceramic molding between a cap and a lamp envelope, the current supply conductors passing through the molding between the cap and the envelope. The conductors pass through separate ducts in the molding, one of the conductors includes a fuse accommodated entirely within the duct, and that duct is sealed at an end adjacent the lamp cap by a coherent mass of material such as a base cement. Flashover from a fuse arc to either the other conductor or the lamp cap is prevented.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: February 11, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Eduard J. P. Janssen, Victor R. Notelteirs
  • Electric incandescent lamp
    Patent number: 4179636
    Abstract: In tubular incandescent lamps having an axially arranged double-coiled filament on each support is present on a single-coiled part between two double-coiled parts of the filament. The single-coiled parts and the double-coiled parts have the same inside diameter, which enables a simple method of production, and hence have a different outside diameter. As a result of this a support provided on a single-coiled part cannot move onto a double coiled part. The construction results in lamps which have a usual operating life span which is closer to a desirable norm.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: December 18, 1979
    Assignee: U.S. Philips Corporation
    Inventor: Eduard J. P. Janssen