Claims
- 1. An arc tube assembly for a high intensity discharge lamp, said assembly comprising: an arc tube having an arc chamber, oppositely disposed press seals at the ends of said arc chamber, an electrode and an electrode lead-in sealed into each of said press seals, said electrodes terminating in said arc chamber and said lead-ins terminating externally of said press seal, and an arc generating and sustaining medium in said arc chamber; and an hermetically sealed jacket containing a partial pressure of a gas that will support lamp starting surrounding said arc tube, said arc tube lead-ins extending beyond said jacket whereby electrical connection can be made thereto; a first electrically conductive member affixed to one of said lead-ins within said jacket and outside of said arc tube; and a second electrically conductive member affixed to the other of said lead-ins and extending outside of said jacket, whereby a capacitive coupling is formed between said first electrically conductive member and said second electrically conductive member, said jacket has an upper portion through which projects a first of said arc tube lead-ins and a base through which projects a second of said arc tube lead-ins, said base containing additionally a dummy lead-in, said first electrically conductive member being electrically connected to said second of said arc tube lead-ins and said second electrically conductive member having a first end connected to said first of said arc tube lead-ins and a second end connected to said dummy lead-in.
- 2. The arc tube assembly of claim 1 wherein said gas is nitrogen.
- 3. The arc tube assembly of claim 2 wherein said partial pressure is about 400 torr.
- 4. The arc tube assembly of claim 3 wherein said second electrically conductive member has the end adjacent said base helically formed.
- 5. The arc tube assembly of claim 4 wherein said second electrically conductive member is stainless steel.
- 6. The arc tube assembly of claim 5 wherein said helical portion comprises three turns.
- 7. The arc tube assembly of claim 6 wherein said first electrically conductive member is a molybdenum wire.
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/075,327 filed Feb. 20, 1998.
US Referenced Citations (6)
Provisional Applications (1)
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Number |
Date |
Country |
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60/075327 |
Feb 1998 |
US |