... 262, 40 4, 40 5, 40 8, 42 7, 44 0, 44 1, 44 4, 44 5, 45 0, 45 6, 508, 538 , 656point (contact), instantaneous, 202, 225, 230 , 242 , 252, 260, 261, 2 64, 40 5, 40 8, 41 4, 42 7, 44 0, 44 1, 44 4, 508, 525, 533 , 538 ,656Contact ... 30 2Centrodescircular gears, of, 38 , 45 , 49 , 50, 115, 137 , 211,2 74, 280, 288, 289, 296, 298, 35 2noncircular gears, of, 31 8, 32 2 33 4, 33 7, 33 8, 34 1, 34 3 34 6, 34 8, 34 9, 35 5, 35 6, 35 9, 36 0Circular pitch, 39 0Clearance, ... axes, 35 , 44 , 44 1Screw involute surface, 40 5, 4 43 44 5, 45 6Screw motion, 28, 54, 41 4, 41 5, 42 1, 4 23, 42 8, 4 43 , 44 4, 45 6, 48 8 49 0, 49 5, 49 6instantaneous axis, of, 55parameter, 28, 32 , 55, 90, 94 Screw...