Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1977-07-18
1980-05-20
Demeo, Palmer C.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313217, 313221, 313493, 313219, H01J 6130, H01J 6136, H01J 6142
Patent
active
042041376
ABSTRACT:
The invention relates to electrode mount assemblies for electric discharge and fluorescent lamps. In accordance with the first aspect of the invention the portions of the electrode support wires which are exposed to electron bombardment within the body of the lamp have at least their surface formed of refractory material. The exposed portions may be coated with a refractory material such as boron nitride or made wholly of a refractory metal such as molybdenum. According to a second aspect of the invention relatively cheap soda-lime silicate glass can be used for the end flares of the lamp tubes, because the provision of refractory surfaces on the vulnerable portions of the support wires enables a metal to be chosen for the portions of the wires passing through the glass seal which closely matches the glass in thermal expansion coefficient. The invention improves the life of lamps by reducing end blackening, reduces the incidence of cracks in the punch seal or neck regions of the lamp and may enable cheaper materials to be used for various structural items.
REFERENCES:
patent: 2000395 (1935-05-01), Jones
patent: 2479164 (1949-08-01), Inman
patent: 2945977 (1960-07-01), Schonherr
patent: 2961566 (1960-11-01), Waymouth et al.
patent: 3069580 (1962-12-01), Waymouth, Jr.
patent: 3249788 (1966-05-01), Wainio et al.
patent: 4013914 (1977-03-01), Clune et al.
"Materials and Techniques for Electron Tubes" by Walter H. Kohl, 1966, Chap. 2, Ceramics, pp. 103, 108.
DeMeo Palmer C.
O'Connell Robert F.
Thorn Electrical Industries Limited
LandOfFree
Fluorescent lamp with refractory metal electrode supports and gl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluorescent lamp with refractory metal electrode supports and gl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent lamp with refractory metal electrode supports and gl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-451467