18. An electronic printer having a single tracing element for tracing alphanumeric characters, comprising spacing means for relatively moving said tracing element and the paper in a letter spacing relationship, storing means for storing addressable numerical instructions for each one of said characters, addressing means for addressing each time the instructions of a predetermined character, control means conditioned by said addressed instructions, driving means controlled by said control means for driving a pair of electromagnets each having a movable member, and kinematic means supporting said tracing element and connected to said movable members for converting the movements of the said two movable members into the movements of said tracing element along a pair of coordinates, said kinematic means comprising a group of hinged arms, the hinges of which are formed by flexible leaf springs.
18. An electronic printer having a single tracing element for tracing alphanumeric characters, comprising spacing means for relatively moving said tracing element and the paper in a letter spacing relationship, storing means for storing addressable numerical instructions for each one of said characters, addressing means for addressing each time the instructions of a predetermined character, control means conditioned by said addressed instructions, driving means controlled by said control means for driving a pair of electromagnets each having a movable member, and kinematic means supporting said tracing element and connected to said movable members for converting the movements of the said two movable members into the movements of said tracing element along a pair of coordinates, said kinematic means comprising a group of hinged arms, the hinges of which are formed by flexible leaf springs. 34. A printer according to claim 18, wherein said tracing element comprises a stylus, an ink ribbon being interposed between said stylus and the paper, the printing being effected by the pressure exerted by said stylus against said ribbon.