198 / | HD | CONVEYORS: POWER-DRIVEN |
463.1 | DF | CONVEYOR SYSTEM FOR MOVING A SPECIFIC LOAD AS A SEPARATE UNIT {9} |
464.1 | .~ System includes control means responsive to sensing means {2} | |
464.2 | DF | .~.~> Responsive to load presence or absence {1} |
464.4 | DF | .~.~> Responsive to undesired condition of load |