Patents by Inventor Tjepke Hendrik Ekkelboom

Tjepke Hendrik Ekkelboom 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-pressure discharge lamp
    Patent number: 4117367
    Abstract: A high-pressure discharge lamp having at least one electrode fabricated by an isostatic compression process.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: September 26, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Jan Rudolf DE Bie, Tjepke Hendrik Ekkelboom, Johannes Jacobus Franciscus Geytenbeek, Willem Lodewijk VAN Hoorn, Otmar Schob
  • Method of manufacturing an article containing at least one glass part in which a metal part is sealed in
    Patent number: 4086075
    Abstract: A method of making glass beads for current leading-in wires of lamps by internal and external high-frequency heating of a glass tube which surrounds a metal rod.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: April 25, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Tjepke Hendrik Ekkelboom, Thomas Geeven
  • Solder joint connection between lead-in conductor and electrode
    Patent number: 4038579
    Abstract: A soldered joint between articles of at least one of the high melting point metals, high melting point carbides and high melting point metal oxides, which joint contains zirconium in which at least the external surface layer of the soldered joint consists of zirconium nitride.The soldered joint is preferably used for securing electrodes for high-pressure gas discharge lamps to current supply conductors.The soldered joint can be obtained by soldering with zirconium in a rare gas atmosphere whereafter the soldering area is heated for some time in a nitrogen-containing atmosphere.
    Type: Grant
    Filed: December 6, 1973
    Date of Patent: July 26, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Tjepke Hendrik Ekkelboom
  • Electrode for a discharge lamp
    Patent number: 4002940
    Abstract: Electrodes for a discharge lamp having a semispherical fused body to produce a very stable arc.The electrodes can be manufactured inter alia by compressing a mixture of tungsten powder, metal carbide powder and a binder to a moulding, sintering the moulding, and fusing it then at least partly in a discharge arc, the sintered moulding serving as one of the electrodes.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: January 11, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Tjepke Hendrik Ekkelboom, Antonius Johannes Alberta VAN Stratum