US PATENT SUBCLASS 400 / 560
.~.~.~ Via frictional engagement of periphery of cylindrical member

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.~.~.~ Via frictional engagement of periphery of cylindrical member {1}
560.1  DF  .~.~.~.~> Friction member(s) acting on inner periphery of drum {2}

DEFINITION

Classification: 400/560

Via frictional engagement of periphery of cylindrical member:

(under subclass 556) Subject matter wherein the ratchet* wheel and the platen* (i.e., the two components referred to below in this definition) are normally joined or engaged by way of a first member connected to one of the components and a second member connected to the other of the components, which first member has a cylindrical circumferential surface and which second member has a surface that is movable toward the circumferential surface to be in nonslidable contact therewith for normal incremental rotation of the platen, and wherein the second member is movable away from the circumferential surface for unjoining or disengaging the members.