Electric Lamp With Electrode Rods Having Longitudinal Grooves
AssigneeKoninklijke Philips Electronics N.V.
InventorsPeter Claus, Ger Van Hees, Jan De Laet, Luc Smets
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Abstract
An electric lamp provided with a bulb (1) of quartz glass and a metal electrode rod (3;21,22). The electrode rod (3;21,22) is at least partly embedded in the quartz glass material of the bulb. At least a major part of the surface of the electrode rod (3;21,22) that is in contact with the quartz glass material is provided with grooves (6) having a substantially longitudinal direction.
Claims11
An electric lamp provided with a bulb (1) of quartz glass and a metal electrode rod (3;21,22), which electrode rod (3;21,22) is at least partly embedded in the quartz glass material of the bulb (1), characterized in that at least a major part of the surface of the electrode rod (3;21,22) that is in contact with the quartz glass material is provided with grooves (6) having a substantially longitudinal direction.
A method of manufacturing an electric lamp provided with a bulb (1) of quartz glass and a metal electrode rod (3;21,22), wherein a part of the electrode rod (3;21,22) is embedded in the quartz glass material of the bulb (1), characterized in that, before the electrode rod (3;21,22) is embedded in the quartz glass material, at least a major part of the surface of the electrode rod (3;21,22) that will be in contact with the quartz glass material is provided with grooves (6) having a substantially longitudinal direction.
Dependencies are inferred from the claim text.