US PATENT SUBCLASS 400 / 566
.~.~.~ With friction brake for platen

Current as of: June, 1999
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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  DF  .~.~ Detent-release structure {2}
566.~.~.~ With friction brake for platen

DEFINITION

Classification: 400/566

With friction brake for platen:

(under subclass 565) Subject matter wherein said second mechanism also includes means for restraining rotation of the platen* while the detent is out of mesh with the notches of the ratchet* disc, which means includes a first surface on or connected to the platen and a second surface nonrotatably associated with the platen and relatively movable into nonslidable contact with the first surface to prevent platen

rotation.