Patents by Inventor Alfons Eugeen Maria Hardies

Alfons Eugeen Maria Hardies 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).

  • Electric lamp with molybdenum contact pins surrounded by non-corrosive metal sleeves
    Patent number: 4015165
    Abstract: Electric lamps having a quartz glass lamp envelope frequently have outer current conductors of molybdenum because this metal has a coefficient of expansion which corresponds best to that of quartz glass. Because molybdenum is sensitive to oxidation the current conductors quickly oxidize so that a good electric contact with connection terminals of a current source is no longer possible. According to the invention, the outer current conductors are surrounded by a sleeve of non-corrosive metal and are rigidly connected thereto by a local kink in the current conductor and the sleeve.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: March 29, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Alfons Eugeen Maria Hardies