US PATENT SUBCLASS 400 / 332
.~.~.~ Via toothed rack

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

283  DF  CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM {11}
319  DF  .~ Carriage-feed mechanism (e.g., escapement, etc.) {14}
329  DF  .~.~ Carriage escapement controlled by pawl {5}
332.~.~.~ Via toothed rack {3}
332.1  DF  .~.~.~.~> And plural pawls {3}
332.5  DF  .~.~.~.~> Including plural toothed racks (e.g., pivoted, etc.)
332.6  DF  .~.~.~.~> Including particular structure of rack (e.g., toothed, slidable, etc.)

DEFINITION

Classification: 400/332

Via toothed rack:

(under subclass 329) Subject matter wherein the regulating mechanism includes (a) a ratchet* that is in the form of a bar having teeth or notches along one of its sides, and (b) a pawl* that cooperates with the ratchet, the assemblage of parts cooperating to effect the restraint and momentary release of the carriage*.

(1) Note. In a "platen-carriage" typewriter (see the discussion of platen carriage in the definition of carriage in the Glossary, section III), the ratchet is usually a carriage-rack*. In a "type-head carriage" typewriter (see the discussion of type-head* carriage in the Glossary, section III) the ratchet [defined in (a) above] is usually fixed to the frame of the typewriter.