Conveyors: power-driven – With alarm or indicator – Means responsive to conveyor movement to indicate speed or...
Patent
1990-10-05
1992-03-17
Dayoan, D. Glenn
Conveyors: power-driven
With alarm or indicator
Means responsive to conveyor movement to indicate speed or...
198807, 198810, B65G 4304
Patent
active
050960440
ABSTRACT:
The run of a belt, such as a conveyor belt or a belt of a weighing scale, is monitored for keeping the belt in a substantially centered position. For this purpose, the belt has a marking element, and a stationary sensor is so arranged that it can scan at least two edges of the marking element. One marking edge extends perpendicularly to the belt running direction. The other marking edge extends at a slant or angle to the belt running direction. Thus, the sensor produces two marker signals at least one of which changes when the belt makes an off-center excursion. The two marker signals and a belt speed representing signal are processed in a computer to provide a belt deviation signal which may be used to correct the belt direction eitehr normally or automatically. The marking element has a triangular configuration and is so arranged that one side of the triangle extends substantially perpendicularly to the belt running direction.
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Guiding and Controlling Conveyor Belts; Automation-Dec. 1972; pp. 56-58.
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Carl Schenck AG
Dayoan D. Glenn
Fasse W. G.
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