Alumina ceramic alkali metal lamp having metal getter structure

Details Alumina ceramic alkali metal lamp having metal getter structure Alumina ceramic alkali metal lamp having metal getter structure

1976-08-02

1977-05-24

Rolinec, Rudolph V.

Electric lamp and discharge devices

Liquid electrode discharge devices

Auxiliary starting or holding electrode

313174, 313178, H01J 6124

Patent

active

040258122

ABSTRACT:
A high pressure sodium vapor lamp utilizing an alumina arc tube within an outer envelope has a getter structure comprising a niobium portion operating in a high temperature range and a titanium portion operating in a lower temperature range. The niobium portion includes a connection extending from a niobium end closure structure of the arc tube to the titanium portion. The titanium portion may form one of the lead supports within the outer envelope or it may merely extend along one of the lead supports. This eliminates the need for the conventional barium getter flash which tends to coat the outer envelope and absorb light.

REFERENCES:
patent: 2749462 (1956-06-01), Kenty et al.
patent: 2926981 (1960-03-01), Stout et al.
patent: 3384798 (1968-05-01), Schmidt
Stout et al., "Journal of Applied Physics," Dec. 1955, pp. 1488-1492.

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