JPS643925A - Sealed contact device - Google Patents
Sealed contact deviceInfo
- Publication number
- JPS643925A JPS643925A JP15906887A JP15906887A JPS643925A JP S643925 A JPS643925 A JP S643925A JP 15906887 A JP15906887 A JP 15906887A JP 15906887 A JP15906887 A JP 15906887A JP S643925 A JPS643925 A JP S643925A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- arc
- anode
- cathode
- melting point
- 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
Abstract
PURPOSE:To suppress the generation of metal vapor from both electrodes by providing a film made of a high-melting point insulating material at positions to become the cathode and anode of an arc across both fixed and movable electrodes. CONSTITUTION:A film D made of a high-melting point insulating material such as ceramic is provided at positions to become the cathode and anode of an arc across both fixed and movable electrodes 1, 3. The arc occurring at the time of current cutoff is extended in the direction determined by the current and magnetic field direction, and the arc is cut off in an extremely short time by the cooling action of hydrogen gas. In this case, the cathode and anode of the arc are moved toward both electrodes 1, 3 but stopped at both contacts 2, 4 because the high-melting point insulating film D is provided on both electrodes 1, 3. The generation of metal vapor from both electrodes can be thereby suppressed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15906887A JPS643925A (en) | 1987-06-25 | 1987-06-25 | Sealed contact device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15906887A JPS643925A (en) | 1987-06-25 | 1987-06-25 | Sealed contact device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS643925A true JPS643925A (en) | 1989-01-09 |
Family
ID=15685514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15906887A Pending JPS643925A (en) | 1987-06-25 | 1987-06-25 | Sealed contact device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS643925A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948933A (en) * | 1989-02-27 | 1990-08-14 | Scan Systems, Inc. | Apparatus for cutting precision notches in work surfaces |
JPH03138829A (en) * | 1989-10-23 | 1991-06-13 | Matsushita Electric Works Ltd | Sealed contact device |
-
1987
- 1987-06-25 JP JP15906887A patent/JPS643925A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948933A (en) * | 1989-02-27 | 1990-08-14 | Scan Systems, Inc. | Apparatus for cutting precision notches in work surfaces |
JPH03138829A (en) * | 1989-10-23 | 1991-06-13 | Matsushita Electric Works Ltd | Sealed contact device |
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