US PATENT SUBCLASS 400 / 560.1
.~.~.~.~ Friction member(s) acting on inner periphery of drum

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}
556  DF  .~.~ Including disconnecting ratchet wheel from platen (e.g., declutching ratchet, etc.) {6}
560  DF  .~.~.~ Via frictional engagement of periphery of cylindrical member {1}
560.1.~.~.~.~ Friction member(s) acting on inner periphery of drum {2}
560.2  DF  .~.~.~.~.~> Pivotable member(s)
561  DF  .~.~.~.~.~> Expandable band or split ring

DEFINITION

Classification: 400/560.1

Friction member(s) acting on inner periphery of drum:

(under subclass 560) Subject matter wherein said first member is hollow and has an interior circumferential surface and said second member contacts said interior surface for joining or engaging the components or moves away from the interior surface for unjoining or disengaging the components.