As door 12 is opened hook {HEAD ~ 60 slips} out of cocking {TAIL ~ hole} 24 and the second configuration signal device 20 swings downward by gravity into the triggered position to indicate mail delivery 
out of cocking
As door 12 is opened hook { HEAD ~ 60 slips } out of cocking { TAIL ~ hole } 24 and the second configuration signal device 20 swings downward by gravity into the triggered position to indicate mail delivery
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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