High-pressure discharge lamp with shielded electrode

Details High-pressure discharge lamp with shielded electrode High-pressure discharge lamp with shielded electrode

1984-04-23

1986-11-04

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Having electrode shield

313623, 313631, H01J 6106, H01J 6136

Patent

active

046212167

ABSTRACT:
The invention relates to a high-pressure discharge lamp having a discharge envelope (3) with a ceramic wall provided with at least one electrode (4). The electrode (4) comprises a rod (41) which is connected to a tubular lead-through member (40) and on which an emitter-containing element (42) is arranged. By means of a screening body (43), the emitter-containing element (42) is screened on its outer side. According to the invention, the screening body (43) extends with a constant cross-section from the tubular lead-through member (40) to the end of the emitter-containing element (42) facing the discharge path. Thus, an improved temperature control is obtained within the discharge envelope (3) during operation of the lamp.

REFERENCES:
patent: 3809943 (1974-05-01), Collins et al.
patent: 3851207 (1974-11-01), McVey
patent: 3911313 (1975-10-01), Makar, Jr.
patent: 4150317 (1979-04-01), Laska et al.
patent: 4160930 (1979-07-01), Driessen et al.
patent: 4396856 (1983-08-01), Ogata et al.

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