Clamp for piles of cloth and other resilient material

Claim 1

A CLAMP FOR RESILIENT MATERIAL, COMPRISING A BASE PLATE DEFINING A STATIONARY FIRST JAW, A BAR SECURED TO AND EXTENDING UPWARDLY FROM SAID PLATE, SAID BAR BEING NONCIRCULAR IN CROSS SECTION, SAID BAR HAVING WIDER OPPOSITE SIDES GENERALLY PARALLEL TO EDGES OF SAID BASE PLATE AND HAVING NARROWER OPPOSITE FRONT AND REAR SIDES EXTENDING GENERALLY TRANSVERSE TO THE EDGES OF THE BASE PLATE, AND A SECOND JAW MOVABLY MOUNTED ON SAID BAR, SAID SECOND JAW HAVING A DOWNWARDLY INCLINED FORWARD PORTION DEFINING A TOOTH EXTENDING FOR THE ENTIRE WIDTH OF THE SECOND JAW, SAID SECOND JAW HAVING A GENERALLY RECTANGULAR REAR PORTION WITH A CENTRALLY LOCATED HOLE THEREIN, SAID WIDER SIDES OF THE BAR HAVING CENTRALLY LOCATED OPPOSING VERTICAL GROOVES THEREIN, SAID HOLE HAVING A RIM WITH CONVEX INWARDLY EXTENDING OPPOSING PROJECTIONS SLIDABLY ENGAGED IN SAID GROOVES, RESPECTIVELY, WHEREBY WHEN THE SECOND JAW IS TILTED ON THE BAR, SAID PROJECTIONS ENGAGE WITH SAID GROOVES AT TWO UPPER REAR POINTS AND TWO LOWER FRONT POINTS OF THE PROJECTIONS, THE NARROWER FRONT SIDE OF THE BAR HAVING A THIRD VERTICAL GROOVE THEREIN WITH TWO FLAT VERTICAL LANDS AT OPPOSITE EDGES OF THE THIRD GROOVE, THE NARROWER REAR SIDE OF THE BAR HAVING A FOURTH VERTICAL GROOVE THEREIN WITH TWO OTHER FLAT VERTICAL LANDS AT OPPOSITE EDGES OF THE FOURTH GROOVE, WHEREBY THE FRONT AND REAR EDGE PORTIONS OF THE HOLE ENGAGE THE BAR AT FOUR POINTS, SO THAT THE SECOND JAW GRIPS THE BAR AT EIGHT POINTS IN ALL.