In the preferred embodiments switches are electromagnetic relays; other types of switches suitable for the voltages and currents of the motor circuit, or {HEAD ~ even digital logic}, can be employed in {TAIL ~ alternative embodiments} 
employed in
In the preferred embodiments switches are electromagnetic relays ; other types of switches suitable for the voltages and currents of the motor circuit , or { HEAD ~ even digital logic } , can be employed in { TAIL ~ alternative embodiments }
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 OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL