Cyclically operable typewriter

Claim 2

A machine for performing sequentially effective interrelated functions comprising a continuously rotating power shaft; a primary drive shaft; a normally disengaged, selectively engageable, fixed increment clutch for selectively connecting said power shaft to said primary drive shaft; first operating mechanism operatively connected with said primary drive shaft for selectively performing a plurality of first operations of the machine upon rotation of said primary drive shaft; a secondary drive shaft; and a second operating mechanism connected with saiD secondary drive shaft for performing a further operation of said machine upon rotation of said secondary drive shaft through a fixed angle; wherein in the improvement comprises: a selectively effective power transmission serially interposed between said primary and secondary drive shafts providing a normally effective drive interconnection therebetween whereby said secondary drive shaft is invariably rotated by said primary drive shaft through a portion of said angle, said transmission being controllable to render said interconnection ineffective, and means responsive to performance of one of said first operations for controlling said power transmission to render said interconnection ineffective.

Claim 3

A typewriter having a continuously rotating power shaft; a primary drive shaft; a normally disengaged, selectively engageable, fixed increment clutch for connecting said power shaft to said primary drive shaft; a keyboard including a first plurality of depressable type keys for selecting print operations of said typewriter and at least one depressable function key for selecting an ancillary typewriter function; a secondary drive shaft; and an impact member connected with said secondary drive shaft for printing upon rotation of said secondary drive shaft through a fixed angle; wherein the improvement comprises: a universal member displaceable upon depression of any of said keys for activating said clutch, s selectively effective power transmission serially interposed between said primary and secondary drive shafts for providing a normally effective drive interconnection therebetween whereby said secondary drive shaft is invariably rotated by said primary drive shaft through a portion of said angle, said transmission being controllable to render said interconnection ineffective, and means responsive to depression of said function key for controlling said power transmission to render said interconnection ineffective.

Claim 4

A typewriter having a continuously rotating power shaft; a primary drive shaft; a normally disengaged, selectively engageable, fixed increment clutch for connecting said power shaft to said primary drive shaft; a keyboard including a first plurality of depressable type keys for selecting print operations of said typewriter and at least one depressable function key for selecting an ancillary typewriter function; a secondary drive shaft; and an impact member connected with said secondary drive shaft for printing upon rotation of said secondary drive shaft through a fixed angle; wherein the improvement comprises: a universal member displaceable upon depression of any of said keys for activating said clutch, s selectively effective power transmission serially interposed between said primary and secondary drive shafts for providing a normally effective drive interconnection therebetween whereby said secondary drive shaft is invariably rotated by said primary drive shaft through a portion of said angle, said transmission being controllable to render said interconnection ineffective, and means responsive to depression of said function key for controlling said power transmission to render said interconnection ineffective.

Claim 5

The typewriter as defined in claim 2 wherein said keyboard includes a plurality of interposers, each of said interposers being individually operatively associated with a different one of said keys for displacement thereby from an unselected to a selected position, latch means for retaining each interposer in its selected position when displaced thereto, a displacement interlock cooperable with all of said interposers for preventing more than of said interposers from being in its selected position at any given time, a power member operatively connected to said clutch for driving any interposer from its selected position, from retension by said latch means, and through an operating stroke; wherein said universal member is displaced to activate said clutch in response to any of said interposers being displaced to its selected position; and wherein said function key depression responsive means comprises the further improvement of: a control member having a first operating position for controlling said power transmission to render said interconnection ineffective and a second operating position, a bail movably positioned adjacent said interposers and operatively connected with said control member, and said interposers and said bail being mutually configurated for differential intercooperation whereby said control member is positioned in said second position by said bail whenever an interposer associated with a type key is driven through its operating stroke and said control member is positioned by said bail in its first position whenever the interposer associated with said function key is driven through its operating stroke.

Claim 6

A typewriter as defined in claim 3 wherein the improvement further comprises means biasing said control member to said first operating position.

Claim 7

Apparatus as defined in any of claims 1, 2, 3, or 4 wherein said selectively effective power transmission comprises: a first transmission clutch element connected for rotation by said primary drive shaft, a second transmission clutch elemenT connected with said secondary drive shaft and rotatable about an axis common with said first transmission clutch element, a pawl, means pivotally supporting said pawl on said second transmission clutch element for motion about a second axis, said first transmission clutch element having a drive surface thereon for receiving said pawl, said drive surface being substantially concentric with said second axis when engaged by said pawl, and an operating arm connected to said pawl for moving said pawl about said second axis to a position of nonengagement with said drive surface.

Claim 8

Apparatus as defined in any of claims 1, 2, 3, or 4, wherein said selective power transmission controlling means is effective only after said secondary drive shaft has been displaced from a home position and wherein the improvement further comprises: a crank arm operatively connected to said secondary drive shaft, and means driven by said primary drive shaft for restoring said secondary drive shaft to its home position through said crank arm.

Claim 9

Apparatus as defined in claim 5, wherein said selective power transmission controlling means is effective only after said secondary drive shaft has been displaced from a home position and wherein the improvement further comprises: a crank arm operatively connected to said secondary drive shaft, and means driven by said primary drive shaft for restoring said secondary drive shaft to its home position through said crank arm.