EP 0123397 A1 19841031 - Unsaturated vapor pressure type high pressure sodium lamp.
Title (en)
Unsaturated vapor pressure type high pressure sodium lamp.
Title (de)
Ungesättigte Hochdrucknatriumdampflampe.
Title (fr)
Lampe à vapeur de sodium à haute pression non saturée.
Publication
Application
Priority
US 47389583 A 19830310
Abstract (en)
An unsaturated vapor pressure high pressure sodium lamp includes an arc tube (17) positioned within an evacuated glass envelope (3) and containing a gas fill including mercury and sodium and a getter having a free energy of formation per mole of oxygen more negative that that of sodium oxide.
IPC 1-7
IPC 8 full level
H01J 61/26 (2006.01); H01J 61/82 (2006.01)
CPC (source: EP)
H01J 61/26 (2013.01); H01J 61/825 (2013.01)
Citation (search report)
- [A] US 3805105 A 19740416 - GUNGLE W
- [A] GB 1580991 A 19801210 - EGYESUELT IZZOLAMPA
- [A] DE 2645930 A1 19770526 - GEN ELECTRIC
- [A] PATENT ABSTRACT OF JAPAN, unexamined applications, M section, vol. 3, no. 12, January 31, 1979 THE PATENT OFFICE JAPANESE GOVERNMENT page 16 M 47 & JP-A-53-135 187 (hitachi)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0123397 A1 19841031; EP 0123397 B1 19881228; AU 2547884 A 19840913; AU 578603 B2 19881103; CA 1222273 A 19870526; DE 3475855 D1 19890202; JP S59169050 A 19840922
DOCDB simple family (application)
EP 84301612 A 19840309; AU 2547884 A 19840309; CA 448953 A 19840306; DE 3475855 T 19840309; JP 4415684 A 19840309