In the illustrated embodiment, this is accomplished by mounting the timing disc 51 on a keyed shaft and providing a plurality of {TAIL ~ offset keyslots} on {HEAD ~ the disc} 51 
In the illustrated embodiment , this is accomplished by mounting the timing disc 51 on a keyed shaft and providing a plurality of { TAIL ~ offset keyslots } on { HEAD ~ the disc } 51
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH