The universal mounting consists of a first housing having a base attached to the boom and {HEAD ~ a power driven worm} in drive relation with a worm gear in {TAIL ~ the housing} 
The universal mounting consists of a first housing having a base attached to the boom and { HEAD ~ a power driven worm } in drive relation with a worm gear in { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL