(under subclass 339.1) Apparatus including indicia or other identification means associated with the conveyed load, or a signalling device associated with either the conveyor or separate work means, which provides an attendant or workman with information regarding operation of the conveyor or handling of the load.
SEE OR SEARCH CLASS
340, Communications: Electrical,
500+, for electrical automatic condition responsive indicating systems, especially subclass 676 relating to conveyor belts.