| 400 / | HD | TYPEWRITING MACHINES |
| 283 | DF | CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM {11} |
| 337 | ![]() | .~ Carriage-retarder mechanism {4} |
| 338 | DF | .~.~> Including governor responsive to speed or momentum {2} |
| 339 | DF | .~.~> Using fluid or fluent-material retarder |
| 340 | DF | .~.~> Using frictional retarder (e.g., strap, disc, drum, etc.) |
| 341 | DF | .~.~> Carriage-buffer stop or rebound control |