Philips Electronics North America Corporation

John S Bailey

Franciscus H Van Lierop

Gregory J Nelson

A ceramic metal halide arc tube is surrounded by a protective sleeve supported by a metal frame having current carrying wire frame members brazed into the metal ferrules of a PAR-lamp. Each frame member has an S-shaped bend which engages the lower end of the sleeve, and a spacer separates the upper ends of the frame to create a rigid self-supporting structure.

Metal halide lamp with metal frame supporting a protective sleeve

A quartz protective sleeve surrounding a ceramic metal halide arc tube is supported by a pair of frame members received inside the sleeve. A short frame member extends only partially into the sleeve, while a long frame member extends through the sleeve and includes a loop which engages a dimple at the top of the lamp envelope. The sleeve is fitted over the frame members, which are spring loaded apart. Axial positioning may be provided by terminals or other features fixed to the frame members. In an alternative embodiment, shoulders for positioning the sleeve and terminals for connecting to the arc tube are formed integrally with the frame members.

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Bradford, NY, United States of America

John S Bailey