ATMOSPHERIC CONTAMINANT COLLECTOR

摘要

A device for controlling the operation of an atmospheric contaminants collecting apparatus comprises means, which are responsive to the prevailing wind velocity at the site of the collecting apparatus and which generate a control signal maintaining the collecting apparatus in operation only when the prevailing wind velocity is on the one side of a predetermined limit value, that is exceeds or alternatively is less than this limit value. In a preferred embodiment the device comprises also means responsive to the prevailing wind direction for modifying or influencing the control signal to the contaminants collecting apparatus in such a manner that the collecting apparatus is maintained in operation only when the prevailing wind velocity is on the one side of the predetermined limit value and at the same time the prevailing wind direction lies within a predetermined sector angle.