Electrode structure for high pressure sodium vapor lamps

(19)

(11)

EP 0 096 804 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.08.1984 Bulletin 1984/34

(43)	Date of publication A2:
	28.12.1983 Bulletin 1983/52

(21)	Application number: 83105413

(22)	Date of filing: 01.06.1983

(84)	Designated Contracting States:
	BE DE FR GB IT NL

(30)

Priority:

11.06.1982 US 387394

(71)	Applicant: GENERAL ELECTRIC COMPANY
	()

(72)	Inventor:
	McVey, Charles Irving ()

(54)	Electrode structure for high pressure sodium vapor lamps

(57) An electrode structure for sodium vapor lamps is disclosed having molybdenum metal wire coils wound around a tungsten shank to replace the customary all-tungsten electrode structure in these lamps. The improved electrode structures provide increased initial lumens with acceptable lumen maintenance.

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