Fluoresent lamp with double cathode and probe

Details Fluoresent lamp with double cathode and probe Fluoresent lamp with double cathode and probe

1986-10-01

1988-03-29

DeMeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

315 98, H01J 6142, H01J 61067

Patent

active

047346167

ABSTRACT:
A dual cathode structure for a fluorescent lamp comprises a pair of electron emissive cathodes which are connected with a common junction and mounted to have an included angle therebetween. The first of the pair of cathodes has first and second leads coupled to an external source of electrical current and the second cathode structure has a first terminal coupled to the first cathode at a common junction and an anode flag connected to its second terminal to collect electrons when the filaments are operating in the anode half cycle. The collected electrons pass through the second cathode. The availability of the second cathode prolongs lamp life by permitting shifting of the hot spot.

REFERENCES:
patent: 3504218 (1970-03-01), Emidy et al.
patent: 3898503 (1975-08-01), Shurgan

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