(under subclass 804) Subject matter having means, separate from the belt, which detects an occurrence of a condition and in response thereto acts to start, stop, or correct the movement of the belt in response to (a) the presence or absence of the load or (b) belt damage or (c) misalignment of the belt or its support means or (d) tension in the belt or in a strand supporting the belt.
SEE OR SEARCH THIS CLASS, SUBCLASS:
502.1+, for indicators for measuring dimensions of the article on a conveyor or indicating the current position of the article along the conveyor or the abnormal speed of the conveyor.
