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.)
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 filedfiledCritical
Priority to JP7221373UpriorityCriticalpatent/JPS5341723Y2/ja
Publication of JPS5021666UpublicationCriticalpatent/JPS5021666U/ja
Application grantedgrantedCritical
Publication of JPS5341723Y2publicationCriticalpatent/JPS5341723Y2/ja
H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
H01H33/66—Vacuum switches
H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
H01H33/6647—Contacts; Arc-extinguishing means, e.g. arcing rings having fixed middle contact and two movable contacts