US PATENT SUBCLASS 400 / 573
.~.~ Including rectilinearly movable pawl

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

545  DF  FOR LINE-SPACING BY INCREMENTAL ROTATION OF PLATEN {15}
572  DF  .~ By pawl and ratchet wheel drive {3}
573.~.~ Including rectilinearly movable pawl {1}
573.1  DF  .~.~.~> And resilient drive

DEFINITION

Classification: 400/573

Including rectilinearly movable pawl:

(under subclass 572) Subject matter wherein the pawl* is moved to-and-fro by an actuator along a straight line to contact and rotate the ratchet* incrementally.