US PATENT SUBCLASS 400 / 330.2
.~.~.~.~.~ For half-drop escapement

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  DF  .~.~.~.~ And plural pawls {4}
330.2.~.~.~.~.~ For half-drop escapement

DEFINITION

Classification: 400/330.2

For half-drop escapement:

(under subclass 330.1) Subject matter wherein significance is attributed to an action of the pawl* and ratchet* mechanism that restrains, momentarily releases, and again restrains the movement of said carriage* to produce a "half-drop" escapement.

(1) Note. The term half-drop escapement is discussed in (2) Note to subclass 329 above, wherein the action of various forms of carriage escapement (including "speed" escapement) is discussed and compared.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329.2, for "speed" escapement and see (1) Note above.