Tape recorder head adjusting mechanism

A tape recorder head adjusting mechanism comprising:

• a movable pin constrained for reciprocation along a path,
• means for intersecting a recording tape with said path,
• a head base including means for moving said head base with said pin,
• a head fixed to said head base, whereby said head is movable towards and away from said recording tape along said path,
• a cam rotatable about an axis transverse to said path,
• means for biasing said pin into contact with a cam surface of said cam,
• means for rotating said cam about said axis, whereby rotation of said cam causes said pin, said head base and said head to move along said path,
• first and second movable plates reciprocatable in a first direction transverse to said path,
• means for selectively moving said first plate into intersection with said path at a first position along said path, and
• means for selectively moving said second plate into intersection with said path at a second position, spaced from said first position, along said path, whereby either said cam, said first plate or said second plate can selectively restrain said pin in one of three positions along said path, so that said head can be selectively restrained in three positions relative to said tape.