Mosaic printer

In a mosaic printer of the type for printing alphanumeric symbols having an integer number n of printing needles driven by separate electromechanical drives through electric lines connected to the input of selection logic having an output connected to the electromechanical drives for selecting the needles to be actuated each print cycle to form the symbols, and having an electrical power source loadable impulsively by said electromechanical drives, the current pulses corresponding to said symbols, the improvement which comprises:

• a compensation device having a plurality of compensators and compensator electric lines simulating the electrical characteristics of said electromechanical drives and their said electric lines, said plurality of compensators and compensator electric lines being positioned close to said electromechanical drives and said electric lines, said compensation device also having a compensator selector for selecting which of said plurality of compensators and compensator electric lines are to be energized, connected at the output to said compensator electric lines, said compensator selector having first second and third inputs;
• means for switching power from said power source to said compensation device at said first compensator selector input simultaneously with power to said selection logic at said input thereof;
• whereby electric impulses in said electromechanical drives and electric lines and in said power source are combined with electric impulses in said compensators and said compensator electric lines and in said power source due to said compensator current loads, thereby eliminating correspondence of the impulsive loads on said power source and radiated pulses in said electromechanical drives and electric lines, to said symbols, maintaining the security of the printed text.