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Rev. A.1, 8/01 Page- 6
FIG 5: MORTISE UNLATCH SIDE VIEW IN REST (SECURE) POSITION
DEADLATCH PIN
SPRINGLATCH
DEADLATCH
FINGERS
SPRINGLATCH
PLUNGER
IN THE REST (SECURE) POSITION, THE SPRINGLATCH IS ALLOWED TO COME OUT BY THE SPRINGLATCH
PLUNGER THEREBY SECURING THE DOOR. THE DEADLATCH FINGERS, HOWEVER, PUSH IN THE
DEADLATCH PIN WHICH "FREEZES" THE SPRINGLATCH FOR BEST SECURITY.
FIG 6: MORTISE UNLATCH IN OPERATION
DEADLATCH PIN
SPRINGLATCH
SPRINGLATCH
DEADLATCH PIN
IN THE FIRST OPERATIONAL STEP, THE DEADLATCH
FINGERS WITHDRAW WHICH ALLOWS THE DEADLATCH
PIN TO COME OUT. THIS "UNFREEZES" THE
SPRINGLATCH
FINALLY, BOTH THE DEADLATCH FINGERS AND
THE SPRINGLATCH PLUNGER MOVE FORWARD
TOGETHER. THIS PUSHES OUT THE SPRING-
LATCH AND DEADLATCH PIN AND THEREBY
RELEASES THE DOOR
DEADLATCH
FINGERS
DEADLATCH
FINGERS
SPRING-
LATCH
PLUNGER
SPRING-
LATCH
PLUNGER