Conveyor unloader

Claim 1

IN AN UNLOADING DEVICE FOR TRANSFERRING OBJECTS BETWEEN PARALLEL HORIZONTAL LOADING AND UNLOADING STATIONS: A GENERALLY HORIZONTAL SHAFT POSITIONED PARALLEL TO AND BETWEEN SAID LOADING AND UNLOADING STATIONS, AN ARM ATTACHED TO SAID SHAFT AND EXTENDING GENERALLY NORMAL THERETO, MEANS FOR ROTATING SAID SHAFT 180* TO SWING SAID ARM FROM ONE HORIZONTAL POSITION ADJACENT THE LOADING STATION TO ANOTHER HORIZONTAL POSITION ADJACENT THE UNLOADING STATION, AN OBJECT HOLDING HEAD ON SAID ARM HAVING MEANS WHICH WHEN ACTUATED PULLS AND HOLDS AN OBJECT ONTO SAID HEAD AND WHICH WHEN DEACTUATED RELEASES THE OBJECT, SAID HEAD FACING GENERALLY RADIALLY OUTWARDLY OF SAID SHAFT, MEANS SENSING AN OBJECT IN SAID LOADING STATION AND ACTUATING SAID HOLDING HEAD TO ATTRACT AND HOLD THE OBJECT ONTO SAID HEAD, MEANS CAUSING SAID SHAFT TO THEREAFTER ROTATE 180* TO SWING THE OBJECT TO THE UNLOADING STATION, MEANS DEACTUATING SAID HOLDING HEAD TO DROP THE OBJECT AT THE UNLOADING STATION, MEANS CAUSING SAID FIRST MENTIONED MEANS TO SWING SAID ARM BACK TO ITS HORIZONTAL POSITION ADJACENT THE LOADING STATION, A CARRIAGE AT SAID UNLOADING STATION, SAID CARRIAGE BEING MOVABLE AWAY FROM SAID HORIZONTAL SHAFT, A RATCHET OPERATIVELY CONNECTED TO SAID CARRIAGE, A CAM ON SAID HORIZONTAL SHAFT, AND MEANS INCLUDING A CAM FOLLOWER ENGAGING SAID CAM AND A PAWL ENGAGING SAID RATCHET AND OPERABLE TO INDEX SAID CARRIAGE DURING ROTATION OF SAID SHAFT.