Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Reexamination Certificate
2007-09-18
2010-02-16
Macchiarolo, Peter J (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
C313S600000
Reexamination Certificate
active
07663318
ABSTRACT:
The restrike time for re-light up of an arc discharge lamp may be decreased by including at least one refractory bimetallic start up electrode that provides a shorter arc path intermediate the main arc path in a cool state, but when heated withdraws to have a relatively longer arc path. The longer arc path in the hot state results in a relatively higher path impedance that can be used by itself or in combination with a supplemental impedance device to extinguish the starting arc in favor of the main arc. The withdrawn bimetallic starting electrode then does not interfere with the main arc function.
REFERENCES:
patent: 6445129 (2002-09-01), Seiler
patent: 1166348 (1985-07-01), None
Koenigsberg William D
Lapatovich Walter P
Perez Victor
Scotch Adam
Macchiarolo Peter J
OSRAM SYLVANIA Inc.
Podszus Edward S.
Zimmerman Glenn
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