| 474 / | HD | ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS | 
| 101 | DF | MEANS FOR ADJUSTING BELT TENSION OR FOR SHIFTING BELT, PULLEY OR GUIDE ROLL {11} | 
| 133 | DF | .~ Guide roll mounted for movement of its axis along arcuate path to tension belt {2} | 
| 135 |  | .~.~ Guide roll spring biased in belt-tensioning direction |