Loom harness mechanism

A loom mechanism for delaying the harness crossing during the weaving cycle comprising a pair of cams, said cams having sides and a surrounding outer camming surface, said camming surface forming at least one lobe on each side of the cam, said first cam lobe being of a lower vertical height than said second cam lobe, pivotable treadles engaging said cams' outer camming surfaces, a harness assembly joined to said treadles, said harness assembly having at least two crossable harness members each for supporting different warps of yarn, said cams' outer camming surfaces being contoured allowing said harness members to cross between 310.degree.-330.degree. of the weaving cycle.