US PATENT SUBCLASS 400 / 221
.~.~ Alternative gear drive including gear directly connected to spool or spindle

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

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
218  DF  .~ Ribbon-reversing mechanism {4}
221.~.~ Alternative gear drive including gear directly connected to spool or spindle {2}
221.1  DF  .~.~.~> And gears mounted on ends of axially shiftable common shaft
221.2  DF  .~.~.~> And gears mounted on ends of pivoted common shaft

DEFINITION

Classification: 400/221

Alternative gear drive including gear directly connected to spool or spindle:

(under subclass 218) Subject matter wherein opposite ends of the ribbon* are attached respectively to first and second cylindrical members, the first member having a first toothed-driven wheel secured thereto, and the second member having a second toothed-driven wheel secured thereto, the first and second driven wheels being driven by a toothed driving wheel selectively engageable with either of the driven wheels or being driven by first or second driving wheels engageable respectively with the first or the second driven wheels, the driving wheel or wheels having a different axis of rotation than the driven wheels, and wherein shiftable means are provided to selectively cause a driving wheel to operatively engage the first driven wheel to move the ribbon the first direction by winding the ribbon on the first member, or to cause a driving wheel to operatively engage the second driven wheel to move the ribbon in the opposite direction by winding the ribbon on the second member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

236.2, for gear drive for ribbon feeding.