Discharge lamp which incorporates divalent cerium halide and cesium halide and a high mercury loading
Abstract
Abstract ARC-DICHARGE DEVICE WHEREIN THE DISCHARGE-SUSTAINING FILLING INCLUDES AS ESSENTIAL ELEMENTS PREDETERMINED AMOUNTS OF AT LAST ONE OF PRASEODYMIUM HALIDE, NEODYMIUM HALIDE AND CERIUM HALIDE PLUS CESIUM HALIDE AND SUFFICIENT MERCURY TO PROVIDE AN OPERATING MERCURY-VAPOR PRESSURE OF FROM 3 TO 15 ATMOSPHERES, IN ADDITION TO THE USUAL STARTING GAS. THE RAREEARTH METAL HALIDE PROVIDES A VERY EFFICIENT DISCHARGE AND THE CESIUM HALIDE PLUS THE HIGH MERCURY LOADING PERMITS A HIGH EFFICIENCY TO BE OBTAINED WITH A RELATIVELY LOW MINIMUM ENVELOPE TEMPERATURE. THE RATIO OF TOTAL GRAM-ATOMS OF HALOGEN TO TOTAL GRAM-ATOMS OF METAL IN THE PRASEODYNIUM, NEODYMIUM OR CERIUM HALIDES IS FROM ABOUT 1.88:1 TO ABOUT 2.7:1, AND THIS PROVIDES A VERY DIFFUSE, STABLE DISCHARGE WHICH IMPROVES THE PERFORMANCES OF THE DEVICE. OTHER DISCHARGE-SUSTAINING MATERIALS DESIRABLE ARE ADDED TO THE FOREGOING ESSENTIAL COMSTITUENTS TO MODIFY THE COLOR OF THE DISCHARGE.
Inventors
- 👤 R Zollweg
- 👤 K Blackham
- 👤 W Burnham
Bibliographic Details
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