{HEAD ~ The shaft} is drivingly coupled to {TAIL ~ the movable switch elements} and the detent mechanism 
{ HEAD ~ The shaft } is drivingly coupled to { TAIL ~ the movable switch elements } and the detent mechanism
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH