US PATENT SUBCLASS 400 / 556.1
.~.~.~ Via relatively displaceable pin and slot members

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}
556.1.~.~.~ Via relatively displaceable pin and slot members

DEFINITION

Classification: 400/556.1

Via relatively displaceable pin and slot members:

(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 at least one projection on one of said components that interfits with at least one aperture on the other of said components, and wherein the unjoining or disengaging occurs by moving the projection to disengage it from the aperture.