a plurality of worm gears each having a helical thread and being rotatably received within said peripheral openings of said sleeve, one of said {HEAD ~ followers} being received within {TAIL ~ the helical thread} of one of said worm gears, 
received within
a plurality of worm gears each having a helical thread and being rotatably received within said peripheral openings of said sleeve , one of said { HEAD ~ followers } being received within { TAIL ~ the helical thread } of one of said worm gears ,
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 HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH