each of said magnets having a radially outside surface which is in {TAIL ~ contact} with said surrounding ferrous cylindrical case and a radially inside surface which is in contact with the radially outside end of its respective pole piece, said inside end of each pole piece being in contact with said outside surface of said ferrous cylindrical wall so that {HEAD ~ a continuous, gapless magnetic path} exists between the poles of each of said magnets, 
each of said magnets having a radially outside surface which is in { TAIL ~ contact } with said surrounding ferrous cylindrical case and a radially inside surface which is in contact with the radially outside end of its respective pole piece , said inside end of each pole piece being in contact with said outside surface of said ferrous cylindrical wall so that { HEAD ~ a continuous , gapless magnetic path } exists between the poles of each of said magnets ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH