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AssigneeASEA Aktiebolag
InventorsSven Gunnar Bergdahl, Erik Torsten Wangdahl
Estimating the term…
For supervising the filling level in an elongated space, such as hoppers, shafts, silos and the like, for miscellaneous granular material, the movement of the material is transformed into vibrations and the vibrations are converted into indicating signals which indicate the filling level. This may be accomplished by a plurality of rods which extend through the wall of the space and are subjected to the vibrations produced by solid materials falling through the space. This may be done by providing rods which extend beyond the wall into the space, and by accelerometers or the like which detect the vibrations and convert them into electrical signals which may control the discharge from the shaft.
Method of supervising the filling level and downward movement of granular material in a vertically elongated space, which comprises pouring said material into said space past and in engagement with at least one sensing mechanism placed at a level substantially above the bottom of said space located in the downward path of said material, transforming the movement of the material engaging said sensing mechanism when falling down into said space into vibrations, converting said vibrations into indication signals denoting the falling of material past said sensing mechanism, whereby, when material in the space has reached a level above said sensing mechanism, substantially no vibration is transmitted.
Means for supervising the filling level and downward movement of granular material in a vertically elongated space, said space having a filling opening above the bottom thereof, comprising at least one sensing member arranged in the wall of said space above the bottom and located in the downward path of material fed into said space through said filling opening, said sensing member comprising a rod device placed substantially spaced from the walls in the hole and being axially fastened near its end in the hole whereby such material will come into contact with the member when falling down into the space as long as the level of the material in the space is below said member, said member being provided with vibration transmitting means responsive to the fall of material against said member when passing into said space, and an indicating mechanism connected to said vibration transmitting means to indicate the movement of material and filling level in the space[.] other vibrations being substantially not sensed in the member because of the spaced positioning of the rod means in the hole.
[11. Means according to claim 7, in which the sensing member comprises an elongated body, one end of which is at least indirectly influenced by the movement
Dependencies are inferred from the claim text.