Electric lamp and discharge devices – With gas or vapor – Having particular electrode structure
Patent
1991-07-18
1992-08-18
Yusko, Donald J.
Electric lamp and discharge devices
With gas or vapor
Having particular electrode structure
313623, 313626, 313334, 313335, H01J 1718, H01J 6136
Patent
active
051402220
ABSTRACT:
To reduce the quantity of a noble gas, typically xenon, and improve the sk and vibration resistance of the quartz glass bulb upon possible movement of electrode support shafts (4, 4') in transport or handling, a support element (6, 6') is engaged against a constriction between the bulb portion (1) and the neck portions (2, 2') of the discharge vessel structure. A spiral spring (8), preferably of tungsten, is engaged against one or more ceramic, perferably aluminum oxide disks, backed up against a melt seal, and pressing the respective disk or disks against the support element. The ceramic disks are loosely seated on the electrode shaft and located within the neck portions with clearance, so that, upon operation of the lamp, and expansion due to heating of the ceramic disks, the stability of the arc is improved and ignition is facilitated due to the lower fill pressure of the noble gas. The disks support the electrode shaft, decrease stress on the support element (6, 6') and permit better heat radiation to the necks, which can still be improved by coating the neck portions with a radiation emitting coating (11').
REFERENCES:
patent: 3636401 (1972-01-01), Cortorillo et al.
patent: 4463281 (1984-07-01), Triebel et al.
patent: 4559472 (1985-12-01), Triebel et al.
patent: 4734612 (1988-03-01), Sasaki et al.
Patel Ashok
Patent Treuhand Gesellschaft fur elektrische Gluhlampen m.b.H
Yusko Donald J.
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