US PATENT SUBCLASS 400 / 557
.~.~.~ Via ball or roller clutching member(s)


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}
557.~.~.~ Via ball or roller clutching member(s)


DEFINITION

Classification: 400/557

Via ball or roller clutching member(s):

(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 spherical or cylindrical member, the surface of which member frictionally engages a surface of each of said two components, and wherein the unjoining or disengaging occurs by moving the surface of the member away from a surface of either or both components.