US PATENT SUBCLASS 400 / 336.1
.~.~.~ Torsion spring in rotatable barrel

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
336  DF  .~.~ Spring-biasing carriage for feed {1}
336.1.~.~.~ Torsion spring in rotatable barrel

DEFINITION

Classification: 400/336.1

Torsion spring in rotatable barrel:

(under subclass 336) Subject matter wherein said yieldable element is in the form of an elongated member wound in a plurality of spiral convolutions housed within a hollow drum, one end of the member being fixed to the drum to effect rotation of the drum when the yieldable element is tensioned.