{HEAD ~ Device} 3, wherein {TAIL ~ the impulse sending wheel} is a cup shaped sheet metal piece which is separately attached by an additional nut to a head of the axial fastening bolt of the device and radially surrounds the nut  
wherein
{ HEAD ~ Device } 3 , wherein { TAIL ~ the impulse sending wheel } is a cup shaped sheet metal piece which is separately attached by an additional nut to a head of the axial fastening bolt of the device and radially surrounds the nut
HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL 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