Type action for hand-operated typewriters

Claim 1

IN A HAND-OPERATED TYPEWRITER HAVING: (A) FRAME, (B) A SET OF KEY LEVERS PIVOTALLY MOUNTED ON SAID FRAME ON LONGITUDINAL VERTICAL PLANES, (C) A TYPE LEVER ASSOCIATED WITH EACH ONE OF SAID KEY LEVERS, (D) A FIRST SUBSTANTIALLY SEMICIRCULAR PIVOT FOR ROCKABLY MOUNTING SAID TYPE LEVERS ON INDIVIDUAL RADIAL PLANES, SAID PIVOT LYING IN A TRANSVERSE PLANE AND HAVING A CIRCLE DIAMETER SUBSTANTIALLY SHORTER THAN THE DISTANCE BETWEEN THE PLANES OF THE TWO OUTER KEY LEVERS OF SAID SET, SAID PIVOT FURTHER BEING SHIFTABLE IN A DIRECTION PARALLEL TO SAID VERTICAL PLANES AND TO SAID TRANSVERSE PLANE, (E) A TYPE ACTION COMPRISING IN COMBINATION: (F) A FIRST ARM FORMED ON EACH ONE OF SAID KEY LEVERS AND ROCKABLE THEREWITH IN THE VERTICAL PLANE THEREOF, SAID ARM BEING SUBSTANTIALLY PARALLEL TO SAID DIRECTION AND DIRECTED UPWARDS, (G) A SUBLEVER ASSOCIATED WITH EACH ONE OF SAID TYPE LEVERS, (H) A SECOND SUBSTANTIALLY SEMICIRCULAR PIVOT FOR ROCKABLY MOUNTING SAID SUBLEVER ON THE RADIAL PLANE OF THE ASSOCIATED TYPE LEVER, SAID SECOND PIVOT BEING COAXIAL WITH SAID FIRST PIVOT, (I) A ROD CONNECTING SAID SUBLEVER TO THE ASSOCIATED TYPE LEVER FOR CONCOMITANT ROTATION, (J) A SECOND ARM FORMED ON SAID SUBLEVER SUBSTANTIALLY DIRECTED RADIALLY OUTWARDS AND SUBSTANTIALLY LYING IN THE PLANE OF SAID SECOND PIVOT, (K) THE LENGTH OF SAID FIRST ARM INCREASING FROM THE CENTRAL TYPE ACTION TO THE OUTER TYPE ACTIONS SUBSTANTIALLY ACCORDING TO THE SAME RATIO AS THE LENGTH OF THE SECOND ARM, (L) AND A ROD SUBSTANTIALLY LYING ON THE INTERSECTION LINE OF EACH ONE OF SAID VERTICAL PLANES WITH THE ASSOCIATED RADIAL PLANE FOR DIRECTLY CONNECTING SAID FIRST ARM TO SAID SECOND ARM.