400 / | HD | TYPEWRITING MACHINES |
283 | DF | CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM {11} |
319 | DF | .~ Carriage-feed mechanism (e.g., escapement, etc.) {14} |
336 | .~.~ Spring-biasing carriage for feed {1} | |
336.1 | DF | .~.~.~> Torsion spring in rotatable barrel |