US PATENT SUBCLASS 400 / 370
.~ Via continously rotated power roll

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

365  DF  HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION {7}
370.~ Via continously rotated power roll {5}
371  DF  .~.~> And oscillatable cam
372  DF  .~.~> And rotatable cam (e.g., single-lobe cam) {1}
374  DF  .~.~> And friction leg (e.g., other than by cam)
375  DF  .~.~> Snatch roll {4}
376  DF  .~.~> With control of impact force

DEFINITION

Classification: 400/370

Via continuously rotated power roll:

(under subclass 365) Subject matter wherein said shaft is turned uninterruptedly (i.e., continuously rotated) and is fixed to a generally cylindrical member for similar continuous rotation of the member, which cylindrical member is positioned transversely of the type-bar* action mechanisms and the key* lever mechanisms of the typewriter, and is provided with surface modifications or characteristics intended to be engaged temporarily with a component that is connected to a type-bar action or to means for actuating a function* when a typist depresses a selected key element that initiates said one action or said one function*.

(1) Note. This subclass includes a typewriter having (a) a plurality of pulleys fixed on a continuously rotated drive shaft, each type-bar action being selectively connected with its respective pulley by a flexible band, or (b) a continuously rotated cam-shaped element selectively engageable by each key lever to limit the rate of depression of the key lever and to drive the selected key lever to its rest position subsequent to impact of the type-bar against the record-medium*.

(2) Note. A power roll of this subclass (370) differs from a drive shaft of subclass 365 in that a drive shaft is merely a continuously rotated shaft, whereas a power roll is located in the typewriter in a particular transverse relationship, has a surface that is particularly modified to engage a selected component for movement of the component, and cooperates with the selected component under control of the typist by way of key lever elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

186, for a continuously rotated power roll selectively connected to plural functions.