Metal halide lamp with ceramic discharge vessel

Details Metal halide lamp with ceramic discharge vessel Metal halide lamp with ceramic discharge vessel

H - Electricity

01

J

H01J 61/36 (2006.01) H01J 17/04 (2006.01) H01J 61/30 (2006.01)

Patent

CA 2424099

A metal halide lamp with ceramic discharge vessel (4), the discharge vessel having two ends (6) that are sealed with ceramic stoppers that in each case contain an elongated capillary tube (12), termed stopper capillary below, of inside diameter K, and wherein an electrically conducting lead-through (9, 10), which comprises an inner part (14) and an outer part (13) with reference to the discharge, is guided through this stopper capillary (12) and is sealed outside with glass solder (18), there being fastened on the lead-through an electrode (16) with a stem (15) that projects into the interior of the discharge vessel, the outside diameter S of the inner part being coordinated with the inside diameter K, the inner part (14) being a composite component that comprises a core pin (18) of diameter D onto which there is mounted as a double ply a coil with an effective diameter d of the core wire, the following relationships being fulfilled: 0.8 K <= S <= 0.98 K d <= D D max <= 0.5 mm 0.16 K <= D <= 0.40 K 0.10 K <= d <= 0.195 K.

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