400 / | HD | TYPEWRITING MACHINES |
545 | DF | FOR LINE-SPACING BY INCREMENTAL ROTATION OF PLATEN {15} |
555 | DF | .~ By irregular increments of platen rotation (e.g., for adjustment of platen relative to its actuator, etc.) {6} |
565 | .~.~ Detent-release structure {2} | |
566 | DF | .~.~.~> With friction brake for platen |
566.1 | DF | .~.~.~> With simultaneous disengagement of drive pawl |