Key duplicating machine

A key duplicating machine comprising:

• a rotatable grinding wheel having a peripheral cutting edge;
• a guide member having a reference edge supported at a fixed distance relative to the cutting edge of said grinding wheel;
• a shaft disposed parallel to the axis of said grinding wheel;
• mounting means for supporting said shaft for movement along and for rotating about the axis thereof;
• a keyholder attached to said shaft, said keyholder providing for holding a key blank and an existing key having notches thereon;
• biasing means for causing said existing key on said keyholder to bear against the reference edge of the guide member as the shaft is moved along its axis to thereby cause said key blank on said keyholder to be rocked about the axis of the shaft laterally into the cutting edge of the grinding wheel to remove material therefrom in accordance with the notches on the existing key;
• a linear cam provided with a ramp thereon;
• and
• projecting means on said keyholder operable upon contacting the ramp on said linear cam as said keyholder is moved along the axis of said shaft to rock said keyholder about the axis of said shaft away from the cutting edge of the grinding wheel into a normal rest position.