second end 64 of the brake band 54 is attached the height of the bight leg 72 of the first bracket 60 and the bight leg 96 of the second bracket 66 is the same so that the spacings of the two top and bottom legs is identical the two brackets are arranged so as to be overlapping such that the top leg 68 of the first bracket 60 overlies the top leg 92 of the second bracket 66 and the bottom leg 70 of the first bracket 60 overlies the bottom leg 94 of the second bracket 66 the bight leg 96 of the second bracket is positioned from the vantage point of fig3 at the right radially outward edge 108 again the top and bottom walls have perimeters in alignment along the bight leg 96 and radially inwardly to a radially inward end 110 and along the radial inward end to a point just to the left of the apertures 98 100 the top leg angles radially outwardly and rightwardly back toward the radial outward end 108 from a point just to the left of the post aperture 98 but the bottom wall 94 extends radially outwardly and somewhat to the left to end in a left radially outward edge 112 the perimeter of the bottom wall then extends in a concave arcuate manner indicated at 114 back toward the right radially outward edge 108 the centers of the apertures 78 80 and 102 104 for the pivot pins 82 106 are positioned radially inwardly of the centers of the apertures for the post.