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Rev. A.1, 8/01
FIG 5: MORTISE UNLATCH SIDE VIEW IN REST (SECURE) POSITION
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.
SPRING-
LATCH
PLUNGER
IN THE FIRST OPERATIONAL STEP, THE DEADLATCH
FINGERS WITHDRAW WHICH ALLOWS THE DEADLATCH
PIN TO COME OUT. THIS "UNFREEZES" THE
SPRINGLATCH
SPRINGLATCH
PLUNGER
FIG 6: MORTISE UNLATCH IN OPERATION
DEADLATCH PIN
DEADLATCH
FINGERS
SPRINGLATCH
DEADLATCH PIN
SPRINGLATCH
SPRING-
LATCH
PLUNGER
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 PIN
DEADLATCH
FINGERS
SPRINGLATCH
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