GB574452A - Improvements in hermetically sealed spark gaps - Google Patents
Improvements in hermetically sealed spark gapsInfo
- Publication number
- GB574452A GB574452A GB307642A GB307642A GB574452A GB 574452 A GB574452 A GB 574452A GB 307642 A GB307642 A GB 307642A GB 307642 A GB307642 A GB 307642A GB 574452 A GB574452 A GB 574452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- spark
- envelope
- faces
- sealed
- 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
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
574,452. Spark-gaps. BRITISH THOMSON-HOUSTON CO., Ltd., GRIEVE, A., WELCH, D. F., and SCOTT, W. J. April 9, 1943, No. 3076/42. [Class 39 (i)] A hermetically-sealed spark-gap comprises metal (nickel) electrodes 3, 4 located in a sealed envelope 1 containing hydrogen at a pressure above 250 mm. of mercury, the electrodes having circular faces about 12.5 mm. in diameter and spaced 3.5 mm. apart, one or both faces being concave with a radius of curvature not less than 5.5 mm., the electrodes being spaced apart by a ceramic hollow cylinder 5. The junction between the cylinder 5 and the electrodes forms a dielectric discontinuity which ionizes the gas filling during operation. Particles of magnesia may be introduced into the envelope and some of these settle ultimately on the electrodes where they form points of high local dielectric stress and further improve the ionization. The hydrogen is commercial gas containing water-vapour and the preferred pressure is 1100 mm. Such a gap will operate at 450 sparks per second at 4 kV. Specification 440,100 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB307642A GB574452A (en) | 1943-04-09 | 1943-04-09 | Improvements in hermetically sealed spark gaps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB307642A GB574452A (en) | 1943-04-09 | 1943-04-09 | Improvements in hermetically sealed spark gaps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB574452A true GB574452A (en) | 1946-01-07 |
Family
ID=9751527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB307642A Expired GB574452A (en) | 1943-04-09 | 1943-04-09 | Improvements in hermetically sealed spark gaps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB574452A (en) |
-
1943
- 1943-04-09 GB GB307642A patent/GB574452A/en not_active Expired
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