US PATENT SUBCLASS 400 / 575
.~.~ Including means to regulate pawl engagement or drive

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}
575.~.~ Including means to regulate pawl engagement or drive {2}
575.1  DF  .~.~.~> By movable ratchet-wheel shield
575.2  DF  .~.~.~> By stop adjustable to limit movement of actuator

DEFINITION

Classification: 400/575

Including means to regulate pawl engagement or drive:

(under subclass 572) Subject matter wherein a predetermined extent of movement of the actuator effects movement of the pawl* to engage a notch in the ratchet* disc at a first location relative to the typewriter and moves the ratchet and the platen* through a first predetermined number of degrees of platen rotation that correspond to a first predetermined number of steps of platen incremental movement, and wherein the number of steps effected by movement of the actuator may be changed so that a second predetermined number of degrees of platen rotation will be caused that will correspond to a second predetermined number of steps of platen incremental movement.