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1. 发明专利

JPH07288073A LEVEL SENSOR 失效
公开(公告)号：JPH07288073A
公开(公告)日：1995-10-31
申请号：JP10142893
申请日：1993-04-27
申请人： FLYGT AB ITT
发明人： BENGUTO SOODERUGAARUDO
IPC分类号： G01F23/68 , G01F23/36 , G01F23/44 , H01H35/18
摘要： PURPOSE: To perform errorless function in any environment without containing material dangerous to environment by operating a microswitch into a connect/ cutoff position by a balance weight rotatably movable between two different terminal positions. CONSTITUTION: When a hollow body 1 is in the air, the body 1 takes a vertical position. The center of gravity 10 of a balance weight 9 is therefore positioned on the left side of a shaft 8, and the weight 9 is going to rotate counterclockwise around the shaft 8. This rotation is stopped when one face comes in contact with the left edge of a disc 5. Immediately before the weight 9 reaches this position, the face 13 actuates a microswitch 15 fitted to the disc 5 so as to connect or cut off an electronic circuit. When the water level rises, the body 1 starts inclining and reaches a horizontal position before long. At this time, the weight 9 shifts the center of gravity 10 to the lower right side of the shaft 8 and rotates clockwise around the shaft 8. During this movement, the surface 13 of the weight 9 loses contact with the disc 5 and an elastic yoke 16, and the switch 15 is operated into the other position. The weight 9 is relatively heavy, but the minimum value obtaining acceptable safety is 30% of the whole weight.

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