EP 0867914 A1 19980930 - Mercury vapour discharge lamp including an amalgam
Title (en)
Mercury vapour discharge lamp including an amalgam
Title (de)
Quecksilberdampf-Entladungslampe mit einem Amalgam
Title (fr)
Lampe à dècharge à vapeur de mercure contenant un amalgame
Publication
Application
Priority
GB 9706399 A 19970327
Abstract (en)
A mercury discharge lamp includes an amalgam for controlling the mercury vapour pressure within the lamp, the amalgam being selected and positioned within the lamp to provide a substantially optimum vapour pressure of mercury at the temperature of the amalgam corresponding to the maximum rated operating power of the lamp. The optimum vapour pressure is close to a minimum (B) at the temperature corresponding to maximum operating power, and adjacent a region (D) of steeply rising mercury vapour pressure with falling temperature. By operating the lamp in this region, a reduction in the operating power of the lamp causes a fall in temperature and hence an increase in the vapour pressure of the mercury to effect dimming of the lamp. <IMAGE>
IPC 1-7
H01J 61/28; H01J 61/20; H01J 61/12; H01J 61/70; H01J 61/72; C22C 7/00; C22C 13/00
IPC 8 full level
C22C 7/00 (2006.01); H01J 61/20 (2006.01); H01J 61/28 (2006.01)
CPC (source: EP)
C22C 7/00 (2013.01); H01J 61/20 (2013.01); H01J 61/28 (2013.01)
Citation (search report)
- [A] US 5598069 A 19970128 - VAN OS RON [US], et al
- [DPA] WO 9713000 A1 19970410 - GEN ELECTRIC [US], et al
- [DA] BLOEM J ET AL: "SOME NEW MERCURY ALLOYS FOR USE IN FLUORESCENT LAMPS", JOURNAL OF THE ILLUMINATING ENGINEERING SOCIETY, vol. 6, no. 3, April 1977 (1977-04-01), pages 141 - 147, XP000615021
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0867914 A1 19980930; EP 0867914 B1 20000920; DE 69800314 D1 20001026; DE 69800314 T2 20010426; GB 2323701 A 19980930; GB 9706399 D0 19970514; JP H113681 A 19990106
DOCDB simple family (application)
EP 98302183 A 19980324; DE 69800314 T 19980324; GB 9706399 A 19970327; JP 6917598 A 19980319