JPS6448333A - Sealed-in type contact device - Google Patents
Sealed-in type contact deviceInfo
- Publication number
- JPS6448333A JPS6448333A JP20333687A JP20333687A JPS6448333A JP S6448333 A JPS6448333 A JP S6448333A JP 20333687 A JP20333687 A JP 20333687A JP 20333687 A JP20333687 A JP 20333687A JP S6448333 A JPS6448333 A JP S6448333A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen gas
- oxide film
- film
- leakage
- long period
- 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.)
- Pending
Links
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Abstract
PURPOSE:To maintain short are decay time for a long period by providing a film for preventing hydrogen gas leakage on the surface of a metal wall. CONSTITUTION:A sealing vessel 1 comprises a drum part 4, a ceiling plate 6, a bottom plate 5, a vent pipe 9, a supporting tube 7 and a metallic bellows 11. Among these the bottom plate 5, the ceiling plate 6, the supporting tube 7 and the vent pipe 9 are oxidation-treated and an oxide film C is formed over the surface of each part. In a area covered with the oxide film C, transmissivity of hydrogen gas is extremely lowered and leakage of hydrogen gas is blocked effectively. In other words, the oxide film C becomes a preventive film for hydrogen gas leakage. It is therefore possible to maintain the state of short arc decay time for a long period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20333687A JPS6448333A (en) | 1987-08-15 | 1987-08-15 | Sealed-in type contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20333687A JPS6448333A (en) | 1987-08-15 | 1987-08-15 | Sealed-in type contact device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448333A true JPS6448333A (en) | 1989-02-22 |
Family
ID=16472328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20333687A Pending JPS6448333A (en) | 1987-08-15 | 1987-08-15 | Sealed-in type contact device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448333A (en) |
-
1987
- 1987-08-15 JP JP20333687A patent/JPS6448333A/en active Pending
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