Metal halide lamp assembly

Details Metal halide lamp assembly Metal halide lamp assembly

1988-10-14

1990-10-02

O'Shea, Sandra

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313634, 313113, H01J 1702, H01J 6134

Patent

active

049610198

ABSTRACT:
An electric lamp includes a lamp assembly mounted in a lamp envelope including a reflector, a lens and a base for connection to an electrical source. The lamp assembly includes an arc tube having a longitudinal axis aligned with the optical axis of the reflector, an arc tube support strap attached to one end of the arc tube and including legs extending laterally in opposite directions from the axis of the arc tube, bulb spacers coupled to the legs of the support strap for positioning the arc tube relative to the lamp envelope, a light-transmissive shroud around the arc tube, and electrode supports coupled to the upper and lower electrode leads of the arc tube. The shroud includes an open end which abuts against the legs of the support strap and a domed end which substantially encloses one end of the arc tube. The electrode supports are electrically isolated from the support strap, the bulb spacers and the reflector. The shroud is secured between the support strap and one of the electrode supports. The domed end of the shroud is preferably located at the lens end of the arc tube, but can also be located at the base end of the arc tube.

REFERENCES:
patent: 2879449 (1959-03-01), Macksoud
patent: 4499396 (1985-02-01), Fohl et al.

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