GB288737A - Improvements in or relating to vapour electric apparatus - Google Patents
Improvements in or relating to vapour electric apparatusInfo
- Publication number
- GB288737A GB288737A GB139127A GB139127A GB288737A GB 288737 A GB288737 A GB 288737A GB 139127 A GB139127 A GB 139127A GB 139127 A GB139127 A GB 139127A GB 288737 A GB288737 A GB 288737A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercury
- added
- copper
- metal
- vapour
- 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
- H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J13/02—Details
- H01J13/04—Main electrodes; Auxiliary anodes
- H01J13/06—Cathodes
- H01J13/08—Cathodes characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J13/02—Details
- H01J13/48—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0072—Disassembly or repair of discharge tubes
- H01J2893/0073—Discharge tubes with liquid poolcathodes; constructional details
- H01J2893/0074—Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control
- H01J2893/0075—Cathodic cups
- H01J2893/0076—Liquid electrode materials
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
288,737. Tomlinson, A. V., (Cooper Hewitt Electric Co.). Jan. 17, 1927. Low-pressure metallic-vapour apparatus. - Liquid electrodes of vapour lamps &c. are composed of mercury alloyed or combined with a metal or metalloid altering the angle of contact of the mercury with the wall of the container in the cold, non-operative state to facilitate starting the lamp, the quantity of the metal or metalloid being so small that, whilst it neutralizes or reverses the convex meniscus of the mercury, it does not permanently leave the mercury and so blacken the container. In a 110 volt lamp 50 inches long, 0.03 to 0.003 per cent, and preferably 0.01 per cent, by weight of copper may be added to the mercury. Nickel or chromium may be added in the same molecular proportions, or 0.01 grs. of aluminium may. be added to each ounce of mercury, or mixtures of these metals may be added. A concave meniscus with thin films rising against the wall gives high electron emission and facilitates starting. The copper &c. does not affect the vapour tension and any copper leaving the mercury is readily carried back. When aluminium, or other metal which produces an amalgam reacting with air, is added, leaky containers can be detected by a scum on the mercury.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB139127A GB288737A (en) | 1927-01-17 | 1927-01-17 | Improvements in or relating to vapour electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB139127A GB288737A (en) | 1927-01-17 | 1927-01-17 | Improvements in or relating to vapour electric apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB288737A true GB288737A (en) | 1928-04-17 |
Family
ID=9721165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB139127A Expired GB288737A (en) | 1927-01-17 | 1927-01-17 | Improvements in or relating to vapour electric apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB288737A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE920498C (en) * | 1949-12-30 | 1954-11-22 | Gen Electric | Electric discharge device |
-
1927
- 1927-01-17 GB GB139127A patent/GB288737A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE920498C (en) * | 1949-12-30 | 1954-11-22 | Gen Electric | Electric discharge device |
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