US PATENT SUBCLASS 400 / 558
.~.~.~ Via binding jaws gripping annular flange between jaws

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}
558.~.~.~ Via binding jaws gripping annular flange between jaws

DEFINITION

Classification: 400/558

Via binding jaws gripping annular flange between jaws:

(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 which is on one of said components and is a radially projecting rim or ring having parallel radial faces on opposite sides of the rim, and a second member which is on the other of said components and includes two parts that straddle the rim of the first member, the two parts of the second member being movable toward each other with the rim therebetween to frictionally engage the radial faces of the first member, and wherein the unjoining or disengaging occurs by moving the parts of the second member away from each other and the corresponding radial faces of the first member.