Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1979-10-17
1985-10-08
Krawczewicz, Stanley T.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313 17, 313 33, 313 44, 313 47, H01J 102, H01J 724, H01J 6152
Patent
active
045462844
ABSTRACT:
A low-pressure mercury vapor discharge lamp having a lamp envelope (1) which encloses a folded tubular discharge vessel (2), the discharge vessel being provided with an appendix (6) which is kept at a relatively low temperature by a heat shield (7) located within the lamp envelope. The heat shield shields the outer wall surface of the appendix from the outer wall of the discharge vessel. The cooler appendix serves to maintain the mercury vapor pressure at an optimum value during operation of the lamp.
REFERENCES:
patent: 2200940 (1940-05-01), Uyterhoeven et al.
patent: 3209188 (1965-09-01), Freeman
patent: 4129800 (1978-12-01), Benthem et al.
Renardus Max L. P.
Sieswerda Bauke
Krawczewicz Stanley T.
Smith Robert S.
U.S. Philips Corporation
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