| 474 / | HD | ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS | 
| 237 | DF | FRICTION DRIVE BELT {14} | 
| 253 | DF | .~ Including particular means connecting opposite ends to form loop {2} | 
| 255 | DF | .~.~ Including discrete connector {3} | 
| 256 |  | .~.~.~ Connector comprises element inserted into longitudinal openings in belt ends |