Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Patent
1981-06-04
1983-11-01
Moore, David K.
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
313617, H01J 6100
Patent
active
044132069
ABSTRACT:
A high-pressure metal halide arc discharge lamp having an arc tube with a pair of main electrodes disposed within the tube at opposite ends and a starting electrode located adjacent one of the main electrodes. A tubular sleeve of insulating material, such as quartz, is disposed about the starting electrode, which is recessed within the sleeve but exposed through the open end thereof to the interior atmosphere of the arc tube. Since the starting electrode does not project beyond the open end of the sleeve, conduction between that electrode and the adjacent main electrode is minimized or prevented during normal lamp operation, thereby minimizing or preventing electrolysis.
REFERENCES:
patent: 2660692 (1953-11-01), St. Louis et al.
patent: 2716198 (1955-08-01), McCallum
patent: 3909660 (1975-09-01), Sulcs et al.
Karlotski Robert J.
Kulik, Jr. Joseph S.
Muzeroll Martin E.
Coleman Edward J.
GTE Products Corporation
Moore David K.
O'Shea Sandra L.
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