JPS6448333A - Sealed-in type contact device - Google Patents

Sealed-in type contact device

Info

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
Application number
JP20333687A
Other languages
Japanese (ja)
Inventor
Kazuo Nomura
Yoshinobu Takegawa
Keiichi Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP20333687A priority Critical patent/JPS6448333A/en
Publication of JPS6448333A publication Critical patent/JPS6448333A/en
Pending legal-status Critical Current

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.
JP20333687A 1987-08-15 1987-08-15 Sealed-in type contact device Pending JPS6448333A (en)

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)

Similar Documents

Publication Publication Date Title
JPS6479545A (en) Pump for pumping up hydrogen
FR2538025B1 (en)
GB2059682A (en) Method of manufacturing gas-filled electric switch
JPS5319181A (en) Low pressure reaction apparatus
SE7711149L (en) HIGH PRESSURE URL CHARGE LAMP
JPS6448333A (en) Sealed-in type contact device
JPS5394468A (en) Metal vapor discharge lamp
GB2020888A (en) Electrochemical Cell Container
FR2565664B1 (en) CONTAINMENT AND INTERVENTION ENCLOSURE FOR THE TRANSPORT AND EMPTYING OF BOTTLES CONTAINING TOXIC AND / OR CORROSIVE GASES AND PRESENTING A LEAKAGE OR MALFUNCTION OF THE TAP.
JPS52103879A (en) Metallic vapor discharge lamp
ES8100488A1 (en) Arrangement and method for detecting the development of a failure in a weld deposit.
NO932051L (en) BOTTLE OR WALL STRUCTURE FOR A METALLURGICAL TANK
JPS5426657A (en) Cathode ray tube
JPS5494776A (en) Metallic vapor discharge lamp
DE69802409T2 (en) SEALED VESSEL FOR TREATING OXIDIZABLE LIQUID METAL
JPS6452349A (en) Sealed contact device
JPS5440204A (en) Vacuum degassing vessel
JPS6452350A (en) Sealed contact device
JPS6459368A (en) Developing device
JPS5231649A (en) Cathode structure for electronic tube
SU1448677A1 (en) DEVICE FOR PORTABLE VACUUMING OF LIQUID METAL
JPS5373629A (en) Preventing device for wave leakage
JPS538833A (en) Furnace hot water leakage detector
JPS5424083A (en) Inspection method of gas leakage from welded part of weld structuae airtight vessel
JPS55100631A (en) Secondary electron multiplier electrode