Oblon, Fisher, Spivak, McClelland & Maier
Electrode of discharge lamp
 An electrode of a high pressure metal-vapor lamp such as a high pressure mercury-vapor lamp including mercury and rare-gas and a high pressure sodium-vapor lamp including mercury, rare-gas and sodium, is disclosed. The electrode has an improved electron emission material containing beryllium oxide and yttrium oxide coated on the substrate of the electrode whereby the electron emission material is uniformly coated to form an electron emission material layer which is firmly bonded and the starting characteristic is excellent and the lumen maintenance is excellent. 
Mitsubishi Denki Kabushiki Kaisha
Y H
Y10T H01J
additional inventional
Masato Keiji Keiji
Saito Watanabe Fukuyama