US PATENT SUBCLASS 400 / 556.3
.~.~.~.~ Including pivotable locking 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}
556.2  DF  .~.~.~ Via toothed ring and locking member(s) {2}
556.3.~.~.~.~ Including pivotable locking member(s)

DEFINITION

Classification: 400/556.3

Including pivotable locking member(s):

(under subclass 556.2) Subject matter wherein said second member (i.e., the projection) is mounted to swing to-and-fro about an axis, thus enabling the projection to move in an arc of a circle.