The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 1981
Filed:
Dec. 14, 1979
Gijsbert Kuus, Eindhoven, NL;
Adriaan J De Ridder, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A halogen incandescent lamp having a light-pervious envelope containing a gas filling comprising a rare gas, hydrogen and bromine. The envelope also contains a tungsten filament and an oxygen getter. The oxygen getter consists of an intermetallic compound of at least one first metal from the group consisting of Ta, Ti, Zr, Hf and Nb and at least one second metal from the group consisting of Pd, Pt and Au, but which intermetallic compound is not a tantalum-gold or a niobium-gold compound. These intermetallic compounds are sufficiently stable that although they react with oxygen, they do not react with hydrogen bromide. Consequently the presence of such an intermetallic compound in such a halogen incandescent lamp does not interfere with the tungsten-bromine cycle, and thus the maximum quantity of the intermetallic compound which is present in such a lamp is not critical.