Quick-release temporary articulated i-beam hanger

Claim 1

IN A HANGER ASSEMBLY FOR SUSPENDING AN ARTICLE FROM THE BASE FLANGE OF A HORIZONTALLY DISPOSED I-BEAM OR THE LIKE, IN COMBINATION, A FLAT SUSPENSION PLATE PROVIDED WITH AN ELONGATED VERTICALLY EXTENDING SLOT THEREIN, A COMBINED PIVOT AND GUIDE PIN PROJECTING HORIZONTALLY THROUGH AND SLIDABLE IN SAID SLOT, A PAIR OF FLAT HOOK PLATES DISPOSED ON OPPOSITE SIDES OF SAID SUSPENSION PLATE IN SUBSTANTIAL FACETO-FACE CONTIGUITY THEREWITH AND HAVING THEIR LOWER REGIONS CONNECTED TO THE PIN FOR RELATIVE SWINGING MOVEMENT OF THE PLATES IN OPPOSITE DIRECTIONS RESPECTIVELY ABOUT THE AXIS OF THE PIN DURING VERTICAL MOVEMENT OF THE LATTER, INTERENGAGING MEANS ON EACH HOOK PLATE AND THE SUSPENSION PLATE CONSTRAINING THE UPPER ENDS OF THE HOOK PLATES TO SWING OUTWARDLY AWAY FROM THE VERTICAL CENTRAL AXIS OF THE SUSPENSION PLATE AND ABOUT THE HORIZONTAL AXIS OF THE PIN TOWARD AN INOPERATIVE POSITION WHEREIN THE AXES THEREOF ARE DIVERGENT AS THE PIN MOVES UPWARDLY IN SAID SLOT, AND INWARDLY TOWARD SAID AXIS AND TOWARD AN INOPERATIVE POSITION WHEREIN SAID AXES ARE VERTICAL AND SUBSTANTIALLY PARALLEL TO EACH OTHER AS THE PIN MOVES DOWNWARDLY IN THE SLOT, EACH HOOK PLATE BEING FORMED WITH A HOOK PORTION THEREON ADAPTED TO OVERLIE THE BASE FLANGE ON OPPOSITE SIDES OF THE I-BEAM WEB WHEN THE HOOK PLATES ARE IN THEIR OPERATIVE POSITION, SAID INTERENGAGING MEANS COMPRISING A PIN PROJECTING THROUGH SAID SUSPENSION PLATE AND EXTENDING OUTWARDLY THEREFROM ON OPPOSITE SIDES THEREOF, EACH OF SAID HOOK PLATES BEING FORMED WITH AN ELONGATED SLOT THEREIN INTO WHICH SAID LATTER PIN PROJECTS.