GB554707A - Improvements in or relating to starting electrodes for electric discharge devices - Google Patents
Improvements in or relating to starting electrodes for electric discharge devicesInfo
- Publication number
- GB554707A GB554707A GB4726/42A GB472642A GB554707A GB 554707 A GB554707 A GB 554707A GB 4726/42 A GB4726/42 A GB 4726/42A GB 472642 A GB472642 A GB 472642A GB 554707 A GB554707 A GB 554707A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mesh
- april
- conductor
- seconds
- layers
- 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
- H01J13/34—Igniting arrangements
- H01J13/36—Igniting arrangements having resistive or capacitative igniter
- H01J13/38—Igniting arrangements having resistive or capacitative igniter having resistive igniter only
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
554,707. Cellulose-derivative compositions. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 10, 1942, No. 4726. Convention date, April 10, 1941. Drawings to Specification. [Class 2 (ii)] [Also in Group XL] In producing a starting electrode, particularly for mercury pool devices, by coating a conductor, such as tungsten or molybdenum, with a plurality of layers of high resistance material, the conductor is first dipped in a mixture of equal parts of 320 mesh (320 holes per linear mesh) boron carbide and 500 mesh silicon carbide with a few per cent. of silicon, suspended in nitro-cellulose dissolved in amyl acetate or diethyl carbonate, and withdrawn in 5-45, preferably 15, seconds. After drying in air, or firing in hydrogen for ten minutes at 1100‹ C. the second layer is formed by dipping in a similar mixture with three parts siliconcarbide to one of boron carbide, and withdrawing in 15-30 seconds. A larger number of layers may be applied with gradually increasing proportions of silicon carbide. Boron nitride may be included in the compositions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US554707XA | 1941-04-10 | 1941-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB554707A true GB554707A (en) | 1943-07-15 |
Family
ID=21998036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4726/42A Expired GB554707A (en) | 1941-04-10 | 1942-04-10 | Improvements in or relating to starting electrodes for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB554707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11812763B2 (en) | 2013-04-29 | 2023-11-14 | Conopco, Inc. | Apparatus and process for coating edible receptacles |
-
1942
- 1942-04-10 GB GB4726/42A patent/GB554707A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11812763B2 (en) | 2013-04-29 | 2023-11-14 | Conopco, Inc. | Apparatus and process for coating edible receptacles |
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