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.)
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.)
Akashi Seisakusho KK
Original Assignee
Akashi Seisakusho KK
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 Akashi Seisakusho KKfiledCriticalAkashi Seisakusho KK
Priority to JP4931179ApriorityCriticalpatent/JPS5815730B2/ja
Publication of JPS55141651ApublicationCriticalpatent/JPS55141651A/ja
Publication of JPS5815730B2publicationCriticalpatent/JPS5815730B2/ja
Method for the self-monitoring of an opto-electronic crack detection device, particularly by the magnetic-powder method, and device for carrying out this method