H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/104
H01J 61/10 (2006.01) H01J 61/28 (2006.01) H01J 61/42 (2006.01)
Patent
CA 1212985
-13- 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.
434394
Anderson John W. Jr.
Roche William J.
Schlitt Steven C.
Yong Thomas S.
Gte Products Corporation
R. William Wray & Associates
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