Electromagnetically operated printer

A serial printer suitable for operable connection to an electronic calculator and the like, said printer comprising:

• a frame means;
• a platen mounted on said frame means;
• a carriage on said frame means being movable in step-by-step fashion adjacent said platen in parallel relation to the axis of said platen;
• a type-head for carrying type indicia, said type-head being mounted on said carriage for translational and rotational type-shifting movements and for printing movement toward said platen;
• type-head shifter means for impelling said type-head toward said platen;
• and
• printer actuating means comprising:
• first electromagnet means mounted on said frame means;
• first cable means operably connected to said first electromagnet means for being displaced by operation of said first electromagnet means;
• type-head translating means for translating said type-head independently of minor variations in length of said first cable means including:
• first shiftable means mounted on and carried by said carriage in driving connection with said type-head, said first shiftable means being connected to said first cable means to be shifted to a plurality of translation adjustment positions in response to selective operation of said first electromagnet means for translating said type-head in a manner changing the type indicia disposed in printing position,
• first stop means mounted on said carriage and being engageable with said first shiftable means to:
• define said translation adjustment positions,
• locate said first shiftable means in said translation adjustment positions, and
• prevent overtravel of said first shiftable means beyond said translation adjustment positions;
• second electromagnet means mounted on said frame means;
• second cable means operably connected to said second electromagnet means for being displaced by operation of said second electromagnet means;
• and
• type-head rotating means for rotating said type-head independently of minor variations in length of said second cable means including:
• second shiftable means mounted on and carried by said carriage in driving connection with said type-head, said second shiftable means being connected to said second cable means to be shifted to a plurality of rotary adjustment positions in response to selective operation of said second electromagnet means for rotating said type-head in a manner changing the type indicia disposed in printing position, and
• second stop means mounted on said carriage and being engageable with said shiftable means to:
• define said rotary adjustment positions,
• locate said second shiftable means in said rotary adjustment positions, and
• prevent overtravel of said second shiftable means beyond said translation adjustment positions.