Conveyor trolley interlocking pusher and cam system

Claim 1

IN A CONVEYOR SYSTEM, IN COMBINATION, A LOAD CARRYING DRIVEN MEMBER AND A DRIVING MEMBER THEREFOR, A TRACKWAY ASSEMBLY FOR GUIDING SAID DRIVEN MEMBER AND SAID DRIVING MEMBER AND INCLUDING AT LEAST ONE PICK UP STATION THEREALONG, ONE OF SAID MEMBERS HAVING A RIGID LUG PROJECTING TOWARD THE OTHER MEMBER, SAID OTHER MEMBER HAVING A PAIR OF DOGS PIVOTALLY ATTACHED THERETO ABOUT AXES PARALLEL TO THE DIRECTION OF TRAVEL OF SAID OTHER MEMBER AND DISPOSED IN LONGITUDINALLY SPACED RELATION TO EACH OTHER, SAID DOGS HAVING OPPOSED FACES EXTENDING GENERALLY TRANSVERSE TO THEIR PIVOTAL AXES TO PRESENT OPPOSED ABUTMENT SURFACES TO HOLD SAID LUG CAPTIVE THEREBETWEEN AND BEING WEIGHTED TO ASSUME NORMAL POSITIONS IN WHICH SAID LUG IS CAPTIVE, AT LEAST ONE OF SAID DOGS HAVING AN OUTER FACE EXTENDING ANGULARLY WITH RESPECT TO THE AFORESAID PIVOTAL AXES TO PRESENT A CAM SURFACE ENGAGEABLE WITH SAID LUG AT SAID PICK UP STATION TO MOMENTARILY PIVOT SAID ONE DOG TO ONE SIDE TO PERMIT SAID LUG TO BE DISPOSED BETWEEN SAID DOGS, THE IMPROVEMENT CONSISTING OF CAM MEANS CARRIED BY SAID TRACKWAY ASSEMBLY IN THE PATH OF MOVEMENT OF SAID DOGS ADJACENT SAID PICK UP STATION TO ASSURE NORMAL POSITIONING OF SAID DOGS TO HOLD SAID LUG CAPTIVE THEREBETWEEN.