During its reciprocating movement, braking force is applied to the shutter opening and closing members, and, in association with {HEAD ~ forward movement} of {TAIL ~ the shutter opening and closing members}, synchro switch contacts are closed, while they are opened in association with the backward movement thereof 
During its reciprocating movement , braking force is applied to the shutter opening and closing members , and , in association with { HEAD ~ forward movement } of { TAIL ~ the shutter opening and closing members } , synchro switch contacts are closed , while they are opened in association with the backward movement thereof
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 REL TAIL TAIL 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