Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For plural electrodes of discharge device
Patent
1978-06-30
1979-04-17
Vertiz, O. R.
Electric lamp and discharge devices
With support and/or spacing structure for electrode and/or...
For plural electrodes of discharge device
106 734, 423625, C04B 3544, C01F 702
Patent
active
041503171
ABSTRACT:
Increased optical transmission is provided for a body of light transmissive polycrystalline alumina having relatively uniform size equiaxed grains of alumina and which is essentially free of porosity and secondary phase material. A tube of the improved optical material can be used as the light transmissive envelope for high intensity discharge lamps especially sodium and other metal vapor lamps exhibiting increased light output as a result of said improved optical transmission. A method of producing the improved optical material is also disclosed.
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Grimm Nelson
Laska Harry M.
Bell Mark
General Electric Company
Kempton Lawrence R.
McDevitt John F.
Neuhauser Frank L.
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