Single-ended compact halogen discharge lamp and reflector combin

Details Single-ended compact halogen discharge lamp and reflector combin Single-ended compact halogen discharge lamp and reflector combin

1989-02-14

1990-06-19

O'Shea, Sandra L.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313113, H01J 1716, H01J 6134

Patent

active

049356607

ABSTRACT:
To permit use of a metal halide discharge lamp for general service illumiion requiring a color temperature of below 4100 K., and preferably about 4000 K., or even less, for example about 3500 K., a metal halide discharge lamp is fitted into a reflector and closely surrounded by a closed transparent tube of hard glass or quartz glass, which may be coated with an indium-tin-oxide (ITO) layer. The surrounding tube is retained against the base structure of the lamp adjacent the reflector apex, or fitted against the reflector, and closed at the other end either by an end cap integral with the tube, or by a separate cap element, retrained in position by a bridging strip spanning the light exit opening of the reflector. Preferably, the reflector is faceted.

REFERENCES:
patent: 3931536 (1976-01-01), Fohl et al.
patent: 4307315 (1981-12-01), Meulemans et al.
patent: 4623815 (1986-11-01), Krieg
patent: 4717852 (1988-01-01), Dobrusskin
patent: 4799135 (1989-01-01), Inukai et al.

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