US PATENT SUBCLASS 400 / 574.1
.~.~.~ And 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}
574  DF  .~.~ Including pawl carrier coaxial with ratchet wheel {1}
574.1.~.~.~ And means to regulate pawl engagement or drive

DEFINITION

Classification: 400/574.1

And means to regulate pawl engagement or drive:

(under subclass 574) Subject matter wherein a predetermined extent of movement of the actuator effects a predetermined extent of movement of said member and the pawl* mounted thereon to move the ratchet* disc and the platen* connected thereto 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 a movement of the actuator may be changed by changing the location at which said pawl engages a notch of said ratchet disc to a second location relative to the typewriter so that a second predetermined number of degrees of rotation of the platen will be caused, that will correspond to a second predetermined number of steps of platen incremental movement.