US PATENT SUBCLASS 400 / 330.1
.~.~.~.~ And plural pawls

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}
330  DF  .~.~.~ Via ratchet wheel connected to pinion and carriage-rack {5}
330.1.~.~.~.~ And plural pawls {4}
330.2  DF  .~.~.~.~.~> For half-drop escapement
330.3  DF  .~.~.~.~.~> Mounted on pivotable pawl carrier or rocker {1}
330.7  DF  .~.~.~.~.~> Mounted on movable (e.g., rotatable, slidable) pawl carrier
330.8  DF  .~.~.~.~.~> Including particular structure of pawl (e.g., pivoted, unitary, with roller, etc.)

DEFINITION

Classification: 400/330.1

And plural pawls:

(under subclass 330) Subject matter wherein the regulating mechanism includes more than one pawl* member.

(1) Note. Usually two pawls are provided, one of the pawls disengaging from between two adjacent teeth of a ratchet* momentarily, and the other of the pawls holding the ratchet against movement in excess of one increment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

332.1, for escapement mechanism having plural pawls and one or more ratchet racks.