Claims
- 1. A process for dosing the arc tube of an unsaturated vapor high pressure sodium lamp comprising the steps of:
- locating a fill consisting essentially of a sodium-and-oxygen-containing compound, an oxygen-absorbing getter, mercury and a rare gas within said arc tube; and
- sealing said arc tube whereby thermal decomposition of said sodium-and-oxygen-containing compound is effected within said arc tube to provide sodium and oxygen with said getter removing said oxygen to prevent sodium-and-oxygen-containing compound reformation.
- 2. The process of claim 1 wherein said sodium-and-oxygen-containing compound is in the form of sodium aluminate.
- 3. The process of claim 1 wherein oxygen-absorbing getter is an alloy of metals selected from the group consisting of aluminum, titanium, scandium, cerium, hafnium, lanthanum, yttrium, thorium an zirconium.
- 4. The process of claim 1 wherein said mercury is in the form of a mercury-containing compound which decomposes to provide mercury.
- 5. The process of claim 1 wherein said mercury is in the form of a liquid.
- 6. The process of claim 1 wherein said sodium-and-oxygen-containing compound is in the form of sodium aluminate and said oxygen-absorbing getter is in the form of a titanium metal alloy.
Parent Case Info
This is a continuation of copending application Ser. No. 07/277,467, filed on Nov. 23, 1988, now abandoned, which is a continuation of parent case Ser. No. 06/473,892, filed on Mar. 10, 1983, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0128172 |
Nov 1978 |
JPX |
0133732 |
Oct 1980 |
JPX |
0143771 |
Nov 1980 |
JPX |
1211175 |
Nov 1970 |
GBX |
1211176 |
Nov 1970 |
GBX |
Continuations (2)
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Number |
Date |
Country |
Parent |
277467 |
Nov 1988 |
|
Parent |
473892 |
Mar 1983 |
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