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

DEFINITION

Classification: 400/556.2

Via toothed ring and locking 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 first member on one of said components and a second member on the other of said components, which first member has notches extending along an arc and which second member is a projection that interfits with one of the notches in the first member, and wherein the unjoining or disengaging occurs by moving the two said members apart.