Note, in FIG 4, that the transmitter 47 and {HEAD ~ the antenna} 49 may be mounted on {TAIL ~ the pendulum} 86 
mounted on
Note , in FIG 4 , that the transmitter 47 and { HEAD ~ the antenna } 49 may be mounted on { TAIL ~ the pendulum } 86
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH