Patent ID: 6300716
Filing Date: 2001-10-09
Classification: H01J,H05B,Y02B

Abstract:
A high-intensity discharge lamp, comprising:a discharge lamp light-transmissive ceramic enclosure having an envelope defining a discharge space and a small diameter cylinder portion communicating with the envelope and having a diameter smaller than the envelope;a feed-conductor, which in comprised of a sealable portion including a coil portion, and a refractory portion coupled to the coil portion by inserting its base end into the coil portion, the feed-conductor being inserted into the small diameter cylinder portion of the discharge lamp light-transmissive ceramic enclosure, thus resulting narrow gaps for both the refractory portion and the inner surface of the small diameter cylinder portion;an electrode mounted on the end of the refractory portion of the feed-conductor;a sealant for sealing gaps between the small diameter cylinder portion of the discharge lamp light-transmissive ceramic enclosure and the sealable portion of the feed-conductor so that at least the sealable portion fails to be exposed to the discharge space; andan ionizing agent filled in the discharge lamp light-transmissive ceramic enclosure.