Absent an obstacle opposing it, stirrup 216 is urged by {HEAD ~ spring} 22 toward its neutral position at which upper surfaces 269 of notches 268 present rear convex edge 273 to bar 266 at the plumb of rear section of {TAIL ~ the surfaces} forming ramp 265 of brackets 259 as shown in FIG 6 
Absent an obstacle opposing it , stirrup 216 is urged by { HEAD ~ spring } 22 toward its neutral position at which upper surfaces 269 of notches 268 present rear convex edge 273 to bar 266 at the plumb of rear section of { TAIL ~ the surfaces } forming ramp 265 of brackets 259 as shown in FIG 6
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH