Electric lamp and discharge devices – With temperature modifier – Mounted on lead-in or electrode support
Patent
1975-11-03
1976-08-10
Rolinec, R. V.
Electric lamp and discharge devices
With temperature modifier
Mounted on lead-in or electrode support
313 43, 313 46, 313 47, 313229, H01J 6152
Patent
active
039744108
ABSTRACT:
A high intensity sodium vapor lamp comprises a tubular envelope of alumina ceramic provided with end closures and containing a charge of sodium mercury amalgam in excess of that vaporized during operation. One closure includes a refractory metal tube sealed off at its tip and wherein unvaporized excess of amalgam collects as a liquid pool. In order to have a sufficiently high temperature at the amalgam pool, a metal slug of high heat conductivity such as molybdenum is placed in it and extends from the seal region towards the tip. Such slug also prevents overheating the seal between the ceramic tube and the end cap.
REFERENCES:
patent: 3450924 (1969-06-01), Knochel et al.
patent: 3558963 (1971-01-01), Hanneman
patent: 3716743 (1973-02-01), Mizumo et al.
patent: 3723784 (1973-03-01), Sules et al.
Collins Byron R.
McVey Charles I.
General Electric Company
Hostetter Darwin R.
Kempton Lawrence R.
Legree Ernest W.
Neuhauser Frank L.
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