EP 0942456 A2 19990915 - Mercury and lead free high pressure sodium lamp
Title (en)
Mercury and lead free high pressure sodium lamp
Title (de)
Quecksilber- und Bleilose Natrium-Hochdruckentladungslampe
Title (fr)
Lampe au sodium sans mercure ni plomb
Publication
Application
Priority
- US 7769898 P 19980312
- US 24425299 A 19990203
Abstract (en)
A long-life, environmentally disposable high pressure sodium lamp comprising: an arc tube capable of withstanding internal wall temperatures of 1250 to 1300 DEG C and having electrodes sealed therein and being designed for operation at a given wattage; a discharge space within the arc tube and an arc generating and sustaining medium within the discharge space, the medium being mercury-free and containing sodium in an amount of about 0.02 mg to 0.06 mg/watt of designed operation, and xenon at a pressure of 100 to 200 Torr; mounting means supporting the arc tube, within a glass outer envelope, the glass outer envelope being lead-free and arsenic-free; and an electrically conductive base closing the outer envelope and containing lead-in wires affixed to the electrodes, the lead-in wires being attached to the base by welding. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 5/62 (2006.01); H01J 61/22 (2006.01); H01J 61/30 (2006.01); H01J 61/34 (2006.01); H01J 61/82 (2006.01)
CPC (source: EP)
H01J 5/62 (2013.01); H01J 61/22 (2013.01); H01J 61/302 (2013.01); H01J 61/34 (2013.01); H01J 61/825 (2013.01)
Citation (applicant)
- US 5682082 A 19971028 - WEI GEORGE [US], et al
- US 8598998 A 19980528
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0942456 A2 19990915; EP 0942456 A3 19990929; EP 0942456 B1 20040804; CA 2261380 A1 19990912; DE 69919056 D1 20040909; DE 69919056 T2 20041230; HU 222332 B1 20030628; HU 9900559 D0 19990528; HU P9900559 A2 19991028; HU P9900559 A3 20010428; JP H11288692 A 19991019
DOCDB simple family (application)
EP 99103825 A 19990227; CA 2261380 A 19990208; DE 69919056 T 19990227; HU P9900559 A 19990309; JP 6492099 A 19990311