Elevators for articles

Claim 1

AN ELEVATOR COMPRISING (1) A PAIR OF SPACED ENDLESS CHAINS SUPPORTED TO MOVE IN PARALLEL PLANES, (2) STATIONARY GUIDE RAILS, (3) PAIRS OF OPPOSITE CARRYING MEMBERS SPACEDLY SECURED TO SAID CHAINS FOR SWINGING MOVEMENTS PARALLEL TO SAID PLANES, (4) A SHAFT ROTATABLY FIXED TO EACH OF SAID MEMBERS TO EXTEND PARALLEL TO SAID PLANES, (5) PAIRS OF OPPOSITE CAM MEANS SPACEDLY SUPPORTED BY SAID GUIDE RAILS, (6) AT LEAST A SINGLE UNIT OF GRABBING MEANS FOR EACH OF SAID MEMBERS, (A) SAID UNIT OF GRABBING MEANS BEING CONSTITUTED BY TWO GRABBING ARMS AND A THIRD ARM, SAID GRABBING ARMS AND SAID THIRD ARM FORMING A TWO-ARMED LEVER, SAID LEVER BEING KEYED TO SAID SHAFT TO PIVOT THEREABOUT FOR LATERAL MOVEMENTS FROM AN OUTWARD OR INOPERATIVE AND NONOBSTRUCTING POSITION TO AN INWARD OR OPERATIVE POSITION, AND VICE VERSA, (B) SAID PAIRS OF CAM MEANS BEING FORMED TO CAUSE SAID GRABBING MEANS TO CARRYING OUT LATERAL SWINGING MOVEMENTS FROM SAID OUTWARD INTO SAID INWARD POSITION, (7) FEELER MEANS PROVIDED AT THE FREE END OF SAID THIRD ARM TO RECURRENTLY COOPERATE WITH SAID PAIRS OF CAM MEANS, AND (8) RESILIENT TENSION MEANS CONNECTING SAID MEMBERS AND GRABBING MEANS AND NORMALLY URGING SAID GRABBING MEANS INTO SAID OUTWARD POSITION.