Electric lamp and discharge devices: systems – Plural series connected load devices – Discharge device loads
Patent
1997-04-07
1999-09-21
Wong, Don
Electric lamp and discharge devices: systems
Plural series connected load devices
Discharge device loads
315185R, 315324, 313596, 313286, H05B 3700
Patent
active
059558458
ABSTRACT:
A high pressure sodium discharge lamp includes first and second discharge devices electrically connected in series within an outer envelope. The discharge devices each include a discharge vessel enclosing a discharge space with an ionizable fill and first and second discharge electrode assemblies. The first discharge electrode assemblies of the discharge devices are connected so as to receive a starting pulse and lamp operating voltage. Each discharge vessel includes a first wall portion spaced from the first discharge electrode assembly and defining an ionizable gap therebetween. A conductive element bridges the discharge devices at the first wall portions and capacitively couples the first discharge electrode assemblies to induce ionization in one of the discharge devices in the ionizable gap between the first wall portion and first discharge electrode assembly.
REFERENCES:
patent: 4751432 (1988-06-01), Van Delm
patent: 5028845 (1991-07-01), Ravi et al.
patent: 5424609 (1995-06-01), Geven et al.
patent: 5541480 (1996-07-01), Renardus et al.
Egbert Walter M.
Philips Electronics North America Corporation
Philogene Haissa
Wong Don
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