High intensity discharge lamp electrode专利检索-高强度放电灯气体放电灯灯光专利检索查询-专利查询网

High intensity discharge lamp electrode

阅读：996发布：2021-11-02

专利汇可以提供High intensity discharge lamp electrode专利检索，专利查询，专利分析的服务。并且In horizontally operated high pressure sodium vapor lamps using alumina ceramic envelopes, spotting and blackening of the envelope has been traced to loose emission material released from the electrodes. Loss of emission material from a double layer wound tungsten electrode is prevented by wrapping a foil of refractory metal such as tungsten or molybdenum around the inner coil after the emission material has been applied, and then winding or screwing the outer coil over the foil. The outer coil holds the foil in place and the foil in turn holds the emission material in place.，下面是High intensity discharge lamp electrode专利的具体信息内容。

权利要求

2. An electrode as in claim 1 wherein the refractory metal of the support structure and overlying grid is tungsten and the refractory metal foil is molybdenum.

3. An electrode as in claim 1 wherein the emissive material is essentially dibarium calcium tungstate.

4. An electrode for a high intensity arc discharge lAmp comprising a refractory metal shank, an inner coil of refractory metal having spaced apart central turns wound around said shank, an electron-emissive material filling the spaces between said turns, a refractory metal foil wrapped around said inner coil to retain said electron-emissive material in place, and an outer coil of refractory metal wire wound over said metal foil to retain it in place around said inner coil.

5. An electrode as in claim 4 wherein the shank, the inner coil, and the outer coil are of tungsten and the foil is of molybdenum.

6. An electrode as in claim 4 wherein the electron-emissive material is essentially dibarium calcium tungstate.

7. A high intensity sodium vapor discharge lamp comprising a slender tubular ceramic envelope, a pair of electrodes sealed into opposite ends, a filling of sodium, mercury, and an inert gas within said envelope, each electrode comprising a refractory metal shank, an inner coil with spaced apart central turns wound around said shank, an electron-emissive material filling the spaces between turns of said inner coil, a wrapping of refractory metal foil around said inner coil, and an outer coil wound over said wrapping to retain it in place.

8. A lamp as in claim 7 wherein the shank, the inner coil, and the outer coil are of tungsten and the metal foil is of molybdenum.

9. A lamp as in claim 7 wherein the electron-emissive material within the electrode is essentially dibarium calcium tungstate.

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