Sodium vapor lamp with emission aperture

Details Sodium vapor lamp with emission aperture Sodium vapor lamp with emission aperture

1977-04-01

1978-01-31

Rolinec, Rudolph V.

Electric lamp and discharge devices

With temperature modifier

For envelope wall

313 17, 313 46, 313227, 313113, H01J 6152

Patent

active

040717992

ABSTRACT:
A low pressure sodium vapor lamp including a sodium vapor discharge tube and a light reflector partially surrounding the discharge tube and defining a light transmission aperture for desired directional light output. The light reflector is in tangential contact with the discharge tube on the surface thereof opposite to the light aperture. The contact between discharge tube and light reflector provides a thermal coupling for heat conduction from the discharge tube. The area of this thermal coupling thus becomes the coolest portion of the discharge tube, the "cold spot" of the lamp where excess sodium is condensed.

REFERENCES:
patent: 3821578 (1974-06-01), Beck et al.

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