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:
Mar. 16, 2004
Filed:
Aug. 17, 2000
Willem Johannes Van Den Bogert, Eindhoven, NL;
Hindrik Hermannus Stel, Eindhoven, NL;
Johannes Theodorus Jacobus Van Haastrecht, Roosendaal, NL;
Jeroen Jan Wits, Eindhoven, NL;
Ronald Arjan Van Den Brakel, Terneuzen, NL;
Pieter Cornelis Ooms, Terneuzen, NL;
Cornelis De Putter, Terneuzen, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A low-pressure mercury vapor discharge lamp is provided with a discharge vessel ( ). The discharge vessel comprises tubular end portions ( ′), which each have a longitudinal axis ( ′). The discharge vessel ( ) encloses a discharge space ( ) containing a filling of mercury and an inert gas in a gastight manner. Electrodes ( ′) are arranged in the discharge space ( ). An auxiliary amalgam is provided on a carrier ( ′) in the proximity of the electrodes ( ′). According to the invention, a part of the carrier ( ′) is arranged in a plane transverse to the longitudinal axis ( ′). Preferably, a stem ( ′) in the tubular end portion ( ′) carries, apart from the electrode ( ′), a support in the form of a wire ( ′) or an extended exhaust tube, which support carries the carrier ( ′). In an alternative embodiment, the carrier is clamped directly onto the stem. Preferably, the carrier ( ′) is electrically insulated with respect to the electrode. Preferably, a distance d between the carrier ( ′) and the electrode ( ′) lies in the range 1≦d≦3 mm. According to the invention, the discharge lamp has a relatively short run-up time.