US 4,198,169 AGranted

Type disc printer

AssigneeAdlerwerke vorm. Heinrich Kleyer A.G.

InventorsWalter Stuiber, Manfred Mansfeld, Heinz Geis, Friedrich Teichmann

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Abstract

An electromechanical printer having characters of a type font located on radial spokes of a circular type disc is disclosed. The type disc is normally arrested and connected to be driven about its axis by a unidirectional motor source via a slip clutch. Selection-print activating mechanism responsive to source, e.g. keyboard, generated mechanical outputs serve to select a character stop, in an assembly of character stops, corresponding to characters located on the spokes of the type disc and, incident to selection of a character stop, to release the normally arrested type disc. The type disc is provided with counterstops adapted to engage selected character stops positioned in the path thereof and to move the character stop assembly to a frame supported final positioning stop which arrests the type disc with the selected character opposite a print point. The encounter of the character stop assembly with the final positioning stop is employed to operate a print hammer to drive the selected character against a platen to print. Following printing, means are provided to reset selected character stops and to restore the character stop assembly to normal position.

Claims8

Dependent claims

A type disc printer having

a frame,
a drive shaft and a driven shaft rotatably supported in said frame,
a slip clutch coupling said drive and driven shafts,
type disc means secured to said driven shaft,
said type disc means having axially flexible radial spokes with type characters thereon,
home stop means on said frame and said type disc means for releasably holding said driven shaft against rotation,
a type character stop plate having an array of angularly located character stops corresponding to type characters on said spokes,
said stops being supported for axial movement from unset to set positions,
said type character stop plate being supported on said frame for limited rotation to a final stop position from a rest position,
means for moving a selected character stop to a set position,
counterstop means on said type disc means for engaging character stops in set position and for carrying said character stop plate to said final stop position whereat rotation of said type disc means is arrested at the selected type character,
means for momentarily moving said home stop means to release said type disc means for rotation to a selected set character stop,
means for restoring said character stop plate to rest position,
means for resetting selected character stops to unset position,
an impact hammer,
and means responsive to movement of said character stop plate to its final stop position for operating said impact hammer to drive an oppositely located spoke to print, and for operating said character stop resetting means, and said characters stop plate restoring means.

13 more elements

Dependencies are inferred from the claim text.