Small printer

A printer for printing characters on a recording medium defining a printing area on which printing occurs comprising a frame, carriage means slidably mounted on said frame for reciprocal lateral displacement across said printing medium, printing means carried on said carriage means for selectively printing characters at predetermined positions in said printing area along lines of said printing medium, drive means for reciprocating said carriage means with non-uniform speed in said printing area of said recording medium so that said printing means reciprocates through said predetermined positions with non-uniform speed and printing position control circuit means for determining when said printing means is in each said predetermined position and for selectively supplying a printing signal to said printing means so that said printing means will print a character at said selected predetermined positions, said printing position control circuit means including generator means for producing reference timing signals in response to the motion of said drive means and division circuit means for receiving said reference timing signals and dividing said reference timing signals by an integer N to produce N timing signals, printing position memory means for producing decision signals representative of the predetermined printing positions of said printing means, coincidence circuit means for receiving said N timing signals and said decision signals and for producing printing signals in response thereto, said printing signals being applied to said printing means so that said printing means will only print in said predetermined positions.

A printer for printing characters on a printing medium comprising a frame, carriage means slidably mounted on said frame for reciprocal lateral displacement across said printing medium, printing means carried on said carriage means for selectively printing characters at predetermined positions along lines of said printing medium, motor means for providing a rotary motion, coupling means coupling said motor means to said carriage means for selectively converting the rotary motion of said motor means into non-uniform reciprocation of said carriage means so that said printing means reciprocates through said predetermined positions, printing position control circuit means for determining when said printing means is in each said predetermined position and for selectively supplying a printing signal to said printing means so that said printing means will print a character at selected predetermined positions, said coupling means including crank means having crank gear means rotatably mounted on said frame and engaged with said motor means for rotation thereby and transmission lever means, said transmission lever means having first and second ends, said first end of said transmission lever means being pivotally coupled to said crank gear means and said second end of said transmission lever means being pivotally coupled to said carriage means for converting the rotation of said crank gear means into reciprocation of said carriage means.