Tungsten halogen lamp with specific fill material, fill pressure

Details Tungsten halogen lamp with specific fill material, fill pressure Tungsten halogen lamp with specific fill material, fill pressure

1997-07-24

1999-03-16

Patel, Vip

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313580, 313623, 313631, H01K 150

Patent

active

058834680

ABSTRACT:
A long life, two filament tungsten halogen lamp having light transmissive envelope, a first filament with a first lead, second lead, filament coil; a second similar filament, and a fill material is disclosed. The filament coil has an increased wire weight, increased over what is commonly used. The fill material comprises a halogen for the tungsten halogen cycle, a getter, and the remainder is approximately equal portions of krypton and xenon. The basic life improvement comes from the heavier tungsten wire weight, combined with the heavier molecular weight of xenon and krypton. The new filament and fill gives a two filament tungsten halogen lamp yielding substantially longer lamp life.

REFERENCES:
patent: 4553066 (1985-11-01), Fields et al.
patent: 4591752 (1986-05-01), Thouret et al.
patent: 4683397 (1987-07-01), Johnson
patent: 5473226 (1995-12-01), Beschle et al.

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