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:
Feb. 20, 2007
Filed:
Jun. 15, 2004
Rolf Erwin DE Man, Eindhoven, NL;
Peter Hubertus Franciscus Deurenberg, Eindhoven, NL;
Theodorus Maria Hendriks, Eindhoven, NL;
Rolf Erwin De Man, Eindhoven, NL;
Peter Hubertus Franciscus Deurenberg, Eindhoven, NL;
Theodorus Maria Hendriks, Eindhoven, NL;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
Low-pressure mercury vapor discharge lamp comprises a light-transmitting discharge vessel () enclosing, in a gastight manner, a discharge space () provided with a filling of mercury and a rare gas. The discharge vessel comprises discharge means () for maintaining a discharge in the discharge space. The discharge vessel is provided with a container comprising an amalgam (). The container is provided with releasing means () for the controlled release of mercury vapor from the amalgam. The releasing means is open during lamp operation and is substantially closed when, during lamp operation, the temperature of the amalgam becomes higher than a pre-determined temperature. Preferably, the pre-determined temperature corresponds to a temperature of a range of temperatures at which the mercury-vapor pressure above the amalgam is relatively stable.