Drive unit construction for conveyors

Claim 1

A DRIVE UNIT CONSTRUCTION FOR AN ENDLESS CONVEYOR MEMBER SUCH AS A BELT COMPRISING (A) FRAME STRUCTURE (B) A MOTORIZED PULLEY ABOUT WHICH SAID ENDLESS MEMBER IS ADAPTED TO BE TRAINED, SAID MOTORIZED PULLEY INCLUDING AN AXLE EXTENDING FROM EACH END THEREOF, (C) SAID FRAME INCLUDING AN END MEMBER ADJACENT EACH END OF SAID MOTORIZED PULLEY AXLE, MEANS PIVOTALLY SECURING AT LEAST ONE OF SAID END MEMBERS TO SAID FRAME FOR SWINGING MOVEMENT ON AN AXIS DISPOSED IN TRANSVERSE SPACED RELATION TO SAID PULLEY AXLE, MEANS FOR DETACHABLY SECURING SAID ONE END MEMBER TO SAID FRAME AGAINST SUCH SWINGING MOVEMENT IN A CLOSED POSITION EXTENDING SUBSTANTIALLY PARALLEL TO THE OTHER OF SAID END MEMBERS, (D) MEANS MOUNTING SAID PULLEY AXLE ON SAID END MEMBERS FOR ADJUSTING MOVEMENT RELATIVE TO THE PATH OF TRAVEL OF SAID CONVEYOR MEMBER, SAID MOUNTING MEANS INCLUDING A PULLEY AXLE MOUNTING PLATE SLIDABLY AND DETACHABLY ENGAGING THE INNER FACE OF SAID ONE END MEMBER IN THE CLOSED POSITION THEREOF, MEANS FOR SECURING SAID PULLEY AXLE TO SAID MOUNTING PLATE, AND (E) PULLEY AXLE ADJUSTING MEANS CARRIED ON EACH OF SAID END MEMBERS, SAID ADJUSTING MEANS INCLUDING A MOTION TRANSMITTING MEMBER ON SAID ONE END MEMBER DETACHABLY ENGAGING SAID MOUNTING PLATE, (F) SAID PULLEY AXLE MOUNTING PLATE BEING DISENGAGED FROM SAID ONE END MEMBER AND FROM SAID MOTION TRANSMITTING MEMBER UPON MOVEMENT OF SAID ONE END MEMBER OUT OF THE CLOSED POSITION THEREOF.