As the rod 33 rotates, the follower rod 37 rotates counter clockwise, whereby the pin 38 fixedly mounted on {HEAD ~ the rod} 37 causes {TAIL ~ the photographic positioning cam sleeve} 7 to turn circumferentially against the resilience of the coiled spring 17 
causes
As the rod 33 rotates , the follower rod 37 rotates counter clockwise , whereby the pin 38 fixedly mounted on { HEAD ~ the rod } 37 causes { TAIL ~ the photographic positioning cam sleeve } 7 to turn circumferentially against the resilience of the coiled spring 17
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 OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH