Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...
Patent
1991-06-13
1993-11-02
O'Shea, Sandra L.
Electric lamp and discharge devices
Electrode and shield structures
Cathodes containing and/or coated with electron emissive...
313346DC, 313344, 313628, 313630, 313631, 313639, H01J 116
Patent
active
052586871
ABSTRACT:
In a mercury vapor arc discharge tube having a pair of electrodes, an emissive material disposed on the electrodes consists essentially of a single phase compound of Ba.sub.x Sr.sub.1-x Y.sub.2 O.sub.4 where x is from about 0.25 to about 0.95.
REFERENCES:
patent: 3170081 (1965-02-01), Rokosz
patent: 4044276 (1977-08-01), Keeffe et al.
patent: 4210840 (1980-07-01), Bhalla
patent: 4783611 (1988-11-01), Vogels et al.
patent: 5111108 (1992-05-01), Goodman et al.
Brates Nanu
Duggan George L.
Goodman David A.
GTE Products Corporation
McNeill William H.
O'Shea Sandra L.
Patel Ashok
Walter Robert E.
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