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US 4,252,452 AGranted
Arabic language typewriter
AssigneeTriumph-Werke Nuremberg A.G.
InventorHerbert Decker
Life of this patent
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Abstract
An Arabic language or other right to left writing typewriter having mechanism normally effecting letter feeding movement from right to left in response to type actions is provided with additional mechanism selectively operatively positionable to effect power operated left to right letter feeding movement in response to type actions.
Claims2
In an Arabic language or other right to left writing typewriter having a frame,
- a carriage movable relative to said frame,
- spring means conncted to urge said carriage to move in a right to left direction,
- escapement means normally controlling the movement of said carriage by said spring means step by step in right to left direction in response to each type action,
- means power operated in response to each type action,
- normally disengaged means positionable for driving engagement with said power operated means and connected to incrementally move said carriage step by step in a left to right writing direction,
- and operator controlled means for positioning said normally disengaged means into or out of driving engagement with said power operated means whenever a change in writing direction is desired,
- said power operated means including a power shaft cyclically driven in response to each type action,
- a cam on said power shaft,
- said normally disengaged means including an output shaft,
- means connecting said output shaft to drive said carriage, and
- an axially positionable friction roll mounted on said output shaft for driving said output shaft when positioned for driving engagement by said cam.
8 more elements
Dependencies are inferred from the claim text.