Electric lamp and discharge devices – With gas or vapor – Incandescent filament lamp
Patent
1990-02-20
1991-04-23
DeMeo, Palmer C.
Electric lamp and discharge devices
With gas or vapor
Incandescent filament lamp
313318, H01K 146
Patent
active
050102729
ABSTRACT:
To provide a compact structure in which a base core (17, 48) can be fitted nto a metallic base sleeve (9, 40) to which a holding structure (4, 7, 34) of a halogen incandescent lamp can be attached, the base core or the sleeve are formed with interengaging rim - engagement surfaces, and the base sleeve, further, is formed with projecting tabs which engage over or into the base core, through slits and recesses formed therein, to hold the base core in position; the base sleeve is additionally formed with a positioning or locating ring or plate (10, 44) so that the lamp holding structure (4, 7, 34) can be welded to the base sleeve to accurately position the filament of the lamp with respect to the locating plate or ring so that the filament can be located with respect to the focal point of a reflector, the tabs permitting compensation for tolerances in the base core, which may be substantial when made of ceramic material. Ceramic, typically Steatite, base cores are highly temperature-resistant, important when the lamp is a halogen incandescent lamp.
REFERENCES:
patent: 4396860 (1983-08-01), Hellwig et al.
patent: 4412273 (1983-10-01), Helbig et al.
patent: 4492893 (1985-01-01), Steiner et al.
patent: 4950942 (1990-08-01), Braun et al.
Eckhardt Fritz
Helbig Peter
Schoenherr Walter
DeMeo Palmer C.
Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
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