GB1265197A - - Google Patents
Info
- Publication number
- GB1265197A GB1265197A GB1265197DA GB1265197A GB 1265197 A GB1265197 A GB 1265197A GB 1265197D A GB1265197D A GB 1265197DA GB 1265197 A GB1265197 A GB 1265197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- vapour
- container
- chromate
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/395—Filling vessels
Abstract
1,265,197. Discharge tubes; cathode processing. S.A.E.S. GETTERS S.p.A. 9 Sept., 1969 [13 Sept., 1968], No. 44495/69. Heading H1D. A member 21 is positioned internally adjacent a longitudinal opening 20 in the elongated metal container of a device for releasing metal vapour resulting from heating a particulate substance 14 to render the opening permeable to the metal vapour but impermeable to the particulate substance. As shown, the member 21 is a wire having a diameter greater than the width d of the opening 20. The wire 21 and the container, which is provided with terminals 12, are made of a Ni/Cr alloy which can be heated to a temperature of about 1000‹ K. by the passage of current. The device may be used for releasing vapours of Hg, Cs, K, Na or Ba in vessels such as electron tubes. The release of Cs in an image intensifier tube is described. The substance 14 may be a mixture of a compound of the desired metal and a reducing agent. Reducible metal compounds include caesium dichromate or more preferably caesium chromate, potassium chromate and sodium chromate. The reducing agent may be silicon or aluminium. Mercuric oxide may be used to produce mercury vapour. A Ba/Al alloy may be used to produce barium vapour. The elongated container may have any desired cross-sectional shape.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT844029 | 1968-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1265197A true GB1265197A (en) | 1972-03-01 |
Family
ID=11126692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1265197D Expired GB1265197A (en) | 1968-09-13 | 1969-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1265197A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360317A1 (en) * | 1988-09-02 | 1990-03-28 | Koninklijke Philips Electronics N.V. | Alkali metal vapour dispenser |
| GB2250752A (en) * | 1990-10-12 | 1992-06-17 | Custom Metalliz Serv Inc | Cylindrical vapor source for vacuum metallizing containing through passage; radiant shield associated therewith |
-
1969
- 1969-09-09 GB GB1265197D patent/GB1265197A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360317A1 (en) * | 1988-09-02 | 1990-03-28 | Koninklijke Philips Electronics N.V. | Alkali metal vapour dispenser |
| GB2250752A (en) * | 1990-10-12 | 1992-06-17 | Custom Metalliz Serv Inc | Cylindrical vapor source for vacuum metallizing containing through passage; radiant shield associated therewith |
| GB2250752B (en) * | 1990-10-12 | 1994-11-23 | Custom Metalliz Serv Inc | Vapor source for vacuum metallizing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |