The hook is operatively connected to a power jack in such a manner that, upon actuation of the power jack, the frame is pulled toward the slat engaged by the hook thereby causing {HEAD ~ the carpet} to be pulled by the prong members toward {TAIL ~ the adjacent wall edge} 
The hook is operatively connected to a power jack in such a manner that , upon actuation of the power jack , the frame is pulled toward the slat engaged by the hook thereby causing { HEAD ~ the carpet } to be pulled by the prong members toward { TAIL ~ the adjacent wall edge }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL