Measuring apparatus to determine the dimensions of an object in three dimensions

A measuring apparatus to determine the dimensions of an object in three dimensions, the apparatus comprising

• a base plate member;
• object receiving means mounted on said base plate member adapted to rotatably but axially and radially immovably fix an object to be measured;
• a measuring carriage assembly mounted on said base plate member distantly to said object receiving means, said measuring carriage assembly including a guiding column projecting from said base plate member and extending in a first direction, and a measuring carriage slidably mounted on said guiding column to be movable along said guiding column;
• a measuring rail slidably mounted on said measuring carriage to be movable in a second direction perpendicular to said first direction;
• first driving means provided on said guiding column and adapted to drive said measuring carriage to a movement along said guiding column in said first direction, and second driving means provided on said measuring carriage and adapted to drive said guiding rail to a linear movement in said second direction;
• measuring calliper means mounted on said measuring rail at one end thereof;
• locking means provided on said measuring carriage and adapted to lock the movement of said measuring carriage along said guiding column to fix said measuring carriage in an arbitrary position on said guiding column;
• said first and second driving means each provided with a rotatable driving member, with a reversing gear assembly coaxially mounted and operatively coupled to said driving member, and with a driven member coaxially mounted and operatively coupled to said reversing gear assembly to drive said driven member to a first speed, said first and second driving means each including auxiliary driving member means engagable with said driving member to directly drive said driven member to a second speed lower than said first speed;
• said measuring calliper means including a measuring calliper with a calliper body and a calliper head mounted on said calliper body and displaceable with regard to said calliper body, said calliper head being connected to said calliper body such that any constant measuring force acting on said calliper head in an arbitrary direction between and including said first and said second directions results in a displacement of said calliper head with regard to said calliper body with identical value and direction, and said measuring calliper means further including position detecting means adapted to display the position of said calliper head with regard to said calliper body.