Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1982-08-23
1985-01-22
Demeo, Palmer
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313546, 313551, H01J 6110, H01J 6142, H01J 6128
Patent
active
044954409
ABSTRACT:
An arc-extinguishing ampul and a low-pressure arc discharge lamp, such as a fluorescent lamp, having such ampul on each electrode structure, the ampul comprising a thin-walled glass body enclosing an arc-extinguishing gas, at least one electrically conductive support wire, and a heat-conductive coating covering the outer surface of the ampul and portions of the support wire. Upon depletion of the electron-emissive coating on one electrode filament at the end of the useful life of the lamp, the arc discharge is attracted to the ampul by the support wire. The heat of the arc softens and melts the ampul to the point where the arc-extinguishing gas within the ampul escapes and renders the lamp inoperable without loss of the lamp's hermetic seal.
REFERENCES:
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patent: 3898511 (1975-08-01), Johnson et al.
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Anderson, Jr. John W.
Roche William J.
Schlitt Steven C.
Yong Thomas S.
Demeo Palmer
GTE Products Corporation
Romanow Joseph S.
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