Single print element selection apparatus with multiple selection inhibiting means

A selection apparatus for a printer of the single element type, having a single print element carried by a print carrier, comprising:

• at least one cylinder supported for both axial and rotational movement, and having a plurality of axially spaced apart camming surface means thereon to effect differing axial displacement of said cylinder;
• a plurality of selection pins, each selectively engageable with one of said camming surface means to impart a predetermined but differing axial motion to said cylinder upon engagement of a selected one of said pins within an associated camming surface means and upon rotation of said cylinder;
• pin selection means to effect propulsion of each of said pins into engagement with an associated camming surface means;
• and pin motion inhibiting means associated with said pin selection means, said pin motion inhibiting means comprising a plurality of slides having code means therein, said code means comprising means defining a plurality of apertures in said slides, said slides dimensioned to permit passage of pins therethrough, and said pins including recessed portions dimensioned to permit engagement of said aperture defining means in a recessed portion thereby engaging at least some of said pins when said slides are in a first position and at least other of said pins when said slides are in a second position to inhibit multiple pin engagement with their associating camming surface means to thereby prevent more than one pin engaging more than one camming surface means at the same time.