Rotation-breakoff Alarm for Photo-recording Cylinder of Geomagnetism
Sun Hua · 2001
The continuity of geomagnetic observation is of great importance.In order to solve the problem of cylinder's breakoff,the operation principle of Rotatio-breakoff Alarm for photo-recording cylinder of Geomagnetism is introduced in detail,and the method how to make it is presented.The circuit diagram is provided for reference and manufacture.