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.)
Publication of NL38990BpublicationCriticalpatent/NL38990B/xx
H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
H01H9/20—Interlocking, locking, or latching mechanisms
H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts