Discharge lamp with an outer bulb surrounded by a wire gauze as explosion protection
AssigneeOSRAM GmbH
InventorsJohannes Buttstaedt, Stefan Dunkel, Andreas Genz, Maik Hegewald
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Abstract
A bushing for a high-pressure discharge lamp, which is suitable for connecting an electrode in the interior of a ceramic discharge vessel to a supply lead in a gastight manner on the exterior of the discharge vessel, wherein the bushing is an electrically conductive ceramic composite consisting of a mixture of LaB6 and at least one second material from the group Al2O3, Dy2Al5O12, AlN, AlON and Dy2O3 is disclosed.
Claims10
A high pressure discharge lamp comprising a discharge vessel sealed in vacuum-tight fashion, said discharge vessel defining a longitudinal axis, containing an ionizable filling and two electrodes and being enclosed by an outer bulb, wherein the outer bulb has a cylindrical central part, wherein at least the cylindrical central part is closely surrounded by a wire gauze as explosion protection, wherein the wire gauze is characterized by the wire diameter and the mesh length of the gauze, and wherein the ratio of mesh length to wire diameter is in the range of 25 to 60, boundary values inclusive,
- wherein the outer bulb further comprising a plurality of ends tapering relative to the central part, and
- wherein end regions of the wire gauze each have a reduced mesh width so that the wire gauze adheres to the outer bulb without any mount.
Dependencies are inferred from the claim text.