Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Patent
1981-09-30
1983-12-20
Smith, Alfred E.
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
313639, H01J 6120
Patent
active
044220111
ABSTRACT:
High-pressure mercury vapor discharge lamp containing rare gas, mercury, sodium halide and at least one halide of at least one of the rare earth metals Ce, Pr, Nd and Lu. The lamp is suitable for a nominal power in the range from 10 to 2000 W. The molar ratio of rare earth metal to sodium, Ln:Na, has a value from 1:20 to 1:1 and the quantity of mercury, A, has a value from 2 to 100 mg/cm.sup.3. Ln:Na and A have in these ranges a low value for lamps having a high value of the power, and higher values according as the nominal power of the lamp has a lower value.
REFERENCES:
patent: 3334261 (1967-08-01), Butler et al.
patent: 3786297 (1974-01-01), Zollweg et al.
patent: 3798487 (1974-03-01), Zollweg et al.
patent: 4229673 (1980-10-01), McAllister
Bruninx-Poesen Leonce M. J.
Drop Peter C.
Endevoets Willy J. C.
Kaldenhoven Lambert C. I.
Lorenz Roland
Fields Carolyn E.
Smith Alfred E.
Spain Norman N.
U.S. Philips Corporation
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