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AssigneeNorth American Philips Corporation
InventorsJoseph E. Canale, Norman R. King
Estimating the term…
A high pressure lamp assembly having an improved structure for supporting the discharge tube while providing an opening bi-metallic switch for electrically disconnecting the auxiliary electrode. Metallic frames are disposed at the upper and lower ends of the discharge lamp to provide at least partial support to the discharge tube. A non-conductive bridge assembly is connected between the lead through of the auxiliary electrode and a conductive rod extending from the stem. The non-conductive bridge provides at least partial mechanical support to the discharge tube. Connected across the non-conductive bridge is the starting resistor and bi-metallic switch element. When the bi-metallic element is unheated, it provides electrical connection through the starting resistor to the auxiliary electrode. When heated by the heat from the discharge tube, the bi-metallic switch moves out of engagement with the ceramic bridge and thus breaks the electrical connection to the auxiliary electrode.
In an electric lamp having an outer envelope, a light source having main electrodes and a auxiliary electrode with associated lead through and first and second conductors for providing current from a point outside of said envelope to within said envelope, the improvement comprising:
Dependencies are inferred from the claim text.