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:
May. 16, 2017
Filed:
Dec. 10, 2010
Barbara Roswitha Muelders, Aachen, DE;
Reiner Feder, Simmerath, DE;
Barbara Roswitha Muelders, Aachen, DE;
Reiner Feder, Simmerath, DE;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The invention describes an electrode () for use in a lamp () comprising a quartz glass envelope () enclosing a chamber (), which electrode () comprises a tip for extending into the chamber () and base for embedding in a sealed portion () of the quartz glass envelope (), characterized in that the base comprises a plurality of essentially smooth concave channels () arranged around the body of the electrode () and wherein the depth (d) of a channel () is preferably at most 8 percent, more preferably at most 5 percent, most preferably at most 3 percent of a diameter (D) of the electrode (). The invention further describes a method of manufacturing an electrode () for use in a lamp () comprising a chamber () in a quartz glass envelope (), which method comprises the step of removing material from the body of the electrode () to form a plurality of channels () around the body of the electrode such that a channel () comprises channel side walls () and an essentially concave channel floor (), and such that depth (d) of a channel () is preferably at most 8 percent, more preferably at most 5 percent, most preferably at most 3 percent of a diameter (D) of the electrode (). The invention also describes a lamp () comprising such electrodes (), and a method of manufacturing such a lamp ().